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EM83055H
KEYBOARD ENCODER
GENERAL DESCRIPTION
The EM83055H microcontroller is dedicated to a keyboard encoder ,specially designed for IBM PC AT and all compatible machines. The EM83055H controll all scan codes, three LEDs status, scan timing and communications between the keyboard and PC. It is easy to implement a high performance, low cost keyboard with the minimal external components.
FEATURES
* * * * * * * * * * * * Low cost - eliminate need external components. Phantom key detects. RC oscillator ( 1.8432MHz ). Support scan code set 1 ,2 and 3. Support PC AT and PS/2 keyboard . Low power CMOS device technology. Internal pull-up resistor. Tri-state outputs for easy board application. Built-in 4K ROM. Support WINDOWSTM 95, 98, 2000, ME keys. 104/107 keys with multi-media or other special application keyboard encoder. WINDOWS is registered trademarks of Microsoft corperation.
APPLICATION
* * * * * * IBM PC AT or compatible machine keyboard. IBM PS/2 model 30,50,60,80 or compatible machine keyboard. Japanese keyboard. Korean keyboard. Brazilian keyboard. European keyboard.
PIN ASSIGNMENTS
P90 CLK DATA OSCO GND R_OSCI VDD CAPS 39 38 37
5 4 3 2 1
P91 P92 P93 P94 P95 P50 P51 P52 P53 P54
6 7 8 9 10 11 12 13 14 15
EM83055H
36 35 34 33 32 31 30 29 28 27
NUM SCROLL P67 P66 P65 P64 P63 P62 P61 P60
* This specification are subject to be changed without notice.
P55 P56 P57 P80 P81 P82 P83 P84 P85 P86 P87
16 17 18 19 20 21 22 23 24 25 26
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KEYBOARD ENCODER
PIN DESCRIPTIONS
Symbol P50 P51 P52 P53 P54 P55 P56 P57 P80 P81 P82 P83 P84 P85 P86 P87 P90 P91 VSS SCROLL NUM CAPS P60 P61 P62 P63 P64 P65 P66 P67 CLK DATA VDD OSCO R_OSCI I/O O O O O O O O O O O O O O O O O O O I O O O I I I I I I I I I/O I/O I O I Function Column 3 Low output scan line, 3-state Column 4 Low output scan line, 3-state Column 5 Low output scan line, 3-state Column 6 Low output scan line, 3-state Column 7 Low output scan line, 3-state Column 14 Low output scan line, 3-state Column 13 Low output scan line, 3-state Column 12 Low output scan line, 3-state Column 11 Low output scan line, 3-state Column 15 Low output scan line, 3-state Column 10 Low output scan line, 3-state Column 8 Low output scan line, 3-state Column 9 Low output scan line, 3-state Column 0 Low output scan line, 3-state Column 16 Low output scan line, 3-state Column 17 Low output scan line, 3-state Column 1 Low output scan line, 3-state Column 2 Low output scan line, 3-state Ground Scroll Lock Indicator NUM Lock Indicator Caps Lock Indicator Row 0 Input scan line, internal pull high ( 17K ) Row 1 Input scan line, internal pull high ( 17K ) Row 2 Input scan line, internal pull high ( 17K ) Row 3 Input scan line, internal pull high ( 17K ) Row 4 Input scan line, internal pull high ( 17K ) Row 5 Input scan line, internal pull high ( 17K ) Row 6 Input scan line, internal pull high ( 17K ) Row 7 Input scan line, internal pull high ( 17K ) CLOCK line for IBM communication , internal pull high ( 2.2K ) DATA line for IBM communication , internal pull high ( 2.2K ) +5V Power Supply CLOCK output Connect 51K OHM resistor for 1.8432 MHz oscillation
* This specification are subject to be changed without notice.
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EM83055H
KEYBOARD ENCODER
FUNCTION DESCRIPTIONS Keyboard buffer The keyboard will buffer 16 bytes in a first-in-first-out order when the system is able to receive scan codes from the keyboard. The response codes and repeated codes will not be buffered. If keystrokes generate a multiple-byte sequence, the entire sequence must fit into the buffer or the keystroke is discarded and a bufferoverrun condition occurs. Power-on Reset and self test The duration of the keyboard Power-on-Reset(POR) should be within 150 milliseconds and 2 seconds after the power is applied to the keyboard. After executing POR , the keyboard executes a self test. The LEDs are turned on at the beginning and off at the end of the self test. The self test takes a minimum 300 milliseconds and a maximum 500 milliseconds. If the self test is successful, a completion code AA hex is sent to the system and the keyboard starts scanning. If the self test fails, and error code is sent, the keyboard is disabled and waits for a command from the system. The completion codes are sent between 450 milliseconds and 2.5 seconds after POR, and between 300 and 500 milliseconds after a RESET command is acknowledged. Keyboard data output When the keyboard is ready to send data to the system, it first checks clock and data lines. If either one is in the low state, data is stored in the keyboard buffer. If both are in the high state, keyboard starts clocking data out. Data will be valid before the trailing edge and after the leading edge of the clock pulse. During the transmission the keyboard checks the clock line at least every 60 microseconds . If the system lowers the clock lines before the leading edge of the 10th clock, the keyboard should stop sending, then buffer the data and return clock and data lines to high state. Keyboard data input When the system is ready to send data to the keyboard, it first checks clock line to see if keyboard is sending data. If keyboard is not sending data or it is sending data but has not reached the 10th clock, the system can inhibit the interface by forcing the clock line low for more than 60 microseconds and prepares to send data. The keyboard checks clock line status at least every 5 milliseconds. If a system Request to Send(RTS) is detected, the keyboard clocks 11 bits in. After the 10th bit, the keyboard checks for a high state in data line then pulls it low and clocks one more bit to signal the system that data has been received. If data is low after the 10th bit, it indicates a frame error. The keyboard should continue to count until data line goes high, then pulls it low and issues a RESEND to the system. Command from the system The system can send commands to the keyboard at any time. The keyboard needs to respond within 20 milliseconds, unless the system prevents keyboard output, when doing self test or executing a RESET. The following are the keyboard input commands and the actions that keyboard needs to take. Set /Reset Status indicators ( Hex ED ) - Responds ACK. - Receives option byte. * This specification are subject to be changed without notice. 9.25.2001
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- Responds ACK. - Updates status indicators. - Returns to previous scanning state. Echo ( Hex EEH ) - Responds with EE hex. - Returns to previous scanning state. Invalid commands ( Hex EF and F1 ) - Returns a RESEND command. - Returns to previous scanning state. Select Alternate Scan Codes ( Hex F0 ) - Responds ACK. - Clears output buffer. - Sets the default typematic rate/delay. - Clears last typematic key. - Receives option byte. - Responds ACK. - Option byte = 01 : selects scan code set 1 02 : selects scan code set 2 03 : selects scan code set 3 - Returns to previous scanning rate. Read ID (F2) - Responds with ACK. - Discontinues scanning. - Sends two ID bytes. The second byte will be sent within 500 uS after first byte. - Resumes scanning. Set Typematic Rate/Delay ( Hex F3 ) - Responds ACK. - Receives rate/delay value byte - Responds ACK. - Set rate/delay (* Note 1) - Returns to previous scanning state. * Note 1 1. Repeat period = ( 8+A ) x ( 2B) x 0.00417 seconds A : binary value of bits 2, 1, and 0. B : binary value of bits 4 and 3. 2. Delay = ( C +1 ) x 250 milliseconds C : binary value of bits 6 and 5. Bit 7 is always 0. * This specification are subject to be changed without notice.
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KEYBOARD ENCODER
bit 4~ bit 0 00000 00001 00010 00011 00100 00101 00110 00111 01000 01001 01010 01011 01100 01101 01110 01111
typematic rate 20% 30.0 26.7 24.0 21.8 20.0 18.5 17.1 16.0 15.0 13.3 12.0 10.9 10.0 9.2 8.6 8.0
bit 4~ bit 0 10000 10001 10010 10011 10100 10101 10110 10111 11000 11001 11010 11011 11100 11101 11110 11111
typematic rate 20% 7.5 6.7 6.0 5.5 5.0 4.6 4.3 4.0 3.7 3.3 3.0 2.7 2.5 2.3 2.1 2.0
3. Default rate = 10.9 chars/sec + 20% Default delay = 500 mS 20% Enable ( Hex F4 ) - Responds with ACK. - Clears output buffer. - Clears last typematic key. - Start scanning. Default Disable (Hex F5) - Responds with ACK. - Resets all conditions to power-on state. - Clears output buffer. - Sets the default key type ( scan code set 3 only ). - Set the default typematic rate/delay. - Clears last typematic key. - Stops scanning, Set Default (Hex F6 ) - Responds with ACK. - Resets all conditions to power-on state. - Clears output buffer. - Sets the default key type ( scan code set 3 only ). - Set the default typematic rate/delay. - Clears last typematic key. - Continues scanning, Set All Keys ( Hex F7,F8,F9,FA ) * This specification are subject to be changed without notice.
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- Responds ACK. - Clears output buffer. - Sets all key type (affect only scan code set 3 operation). F7 : Typematic F8 : Make/Break F9 : Make FA : Typematic/Make/Break - Returns to previous scanning rate. Set Key Type ( Hex FB,FC,FD ) - Responds ACK. - Clears output buffer. - Receives key ID byte - Responds ACK. - Sets key ID type (affect only scan code set 3 operation). FB : Typematic FC : Make/Break FD : Make - Returns to previous scanning rate. Resend ( Hex FE ) - Sends the previous output again. If the previous byte is RESEND, the last byte before RESEND shall be sent. Reset ( Hex FF ) - Responds ACK. - Checks clock and data lines - Reset in the high state for at least 500 microseconds or receives another command. - Default to scan code set 2. Command to the system The following are the keyboard output commands. Acknowledge ( Hex FA ) The keyboard sends an acknowledge in response to any valid command from the system except for RESEND and ECHO. BAT Completion Code ( Hex AA ) This command is issued after successful completion of keyboard self test. Echo ( Hex EE ) The keyboard sends this code in response to an ECHO command.
* This specification are subject to be changed without notice.
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KEYBOARD ENCODER
Keyboards ID ( Hex 83AB ) The 2 byte ID is issued to respond to READ ID command. The low byte is sent first, followed by the high byte. Keyboard buffer Overrun ( Hex 00 or FF ) If keyboard buffer overflows, the overrun code will replace the last byte in the buffer. If the keyboard is using scan code set 1 , the code is hex FF. For sets 2 and 3, the code is hex 00. Resend ( Hex FE ) When the keyboard receives an invalid input or any input with incorrect parity, the RESEND command is sent. Keyboard Scan Code Table The keyboard contains 3 scan code sets. The system defaults to scan code set 2, but can be switched to set 1 or set 3 . The following tables show the key numbers and three scan code sets in hexadecimal values. All the keys are typematics except for the pause key. When a key is pressed down, the make scan code is sent to the system. When the key is released, its break code is sent. If two or more keys are held down, only the last key pressed repeats at the typematic rate. Typematic operation stops when the last pressed key is released, even if other keys are being released or some other keys are still held down. The following table shows three scan code sets used in the keyboard.
scan code set 1 Key (~) 1 2 3 4 5 6 7 8 9 0 -(-) =(+) BACK SPACE TAB Q W E R T Y Make code 29 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 Break code A9 82 83 84 85 86 87 88 89 8A 8B 8C 8D 8E 8F 90 91 92 93 94 95 Key X C V B N M ,(<) .(>) /(?) SHIFT_R CTRL_L ALT_L SPACE ALT_R CTRL_R NUM (7) (4) (1) (8) (5) Make code 2D 2E 2F 30 31 32 33 34 35 36 1D 38 39 E0 38 E0 1D 45 47 4B 4F 48 4C Break code AD AE AF B0 B1 B2 B3 B4 B5 B6 9D B8 B9 E0 B8 E0 9D C5 C7 CB CF C8 CC
* This specification are subject to be changed without notice.
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KEYBOARD ENCODER
Key U I O P [({) ](}) \( )@1 CAPS A S D F G H J K L ;(:) '(") K42 @2 ENTER SHIFT_L K45 @2 Z Key INS DEL LEFT HOME END UP DOWN PAGE UP PAGE DOWN RIGHT
Make code 16 17 18 19 1A 1B 2B 3A 1E 1F 20 21 22 23 24 25 26 27 28 2B 1C 2A 56 2C
Break code 96 97 98 99 9A 9B AB BA 9E 9F A0 A1 A2 A3 A4 A5 A6 A7 A8 AB 9C AA D6 AC
Key (2) () (*) (9) (6) (3) (DEL) (-) (+) (ENTER) ESC F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 SCROLL Shift Case @3 Make/Break E0 AA E0 52 / E0 D2 E0 2A E0 AA E0 53 / E0 D3 E0 2A E0 AA E0 4B / E0 CB E0 2A E0 AA E0 47 / E0 C7 E0 2A E0 AA E0 4F / E0 CF E0 2A E0 AA E0 48 / E0 C8 E0 2A E0 AA E0 50 / E0 D0 E0 2A E0 AA E0 49 / E0 C9 E0 2A E0 AA E0 51 / E0 D1 E0 2A E0 AA E0 4D / E0 CD E0 2A
Make code 50 52 37 49 4D 51 53 4A 4E E0 1C 01 3B 3C 3D 3E 3F 40 41 42 43 44 57 58 46
Break code D0 D2 B7 C9 CD D1 D3 CA CE E0 9C 81 BB BC BD BE BF C0 C1 C2 C3 C4 D7 D8 C6
Base Case,or Shift + Nun Lock Make/Break E0 52 / E0 D2 E0 53 / E0 D3 E0 4B / E0 CB E0 47 / E0 C7 E0 4F / E0 CF E0 48 / E0 C8 E0 50 / E0 D0 E0 49 / E0 C9 E0 51 / E0 D1 E0 4D / ED CD
Num Lock Make/Break E0 2A E0 52 / E0 D2 E0 AA E0 2A E0 53 / E0 D3 E0 AA E0 2A E0 4B / E0 CB E0 AA E0 2A E0 47 / E0 C7 E0 AA E0 2A E0 4F / E0 CF E0 AA E0 2A E0 48 / E0 C8 E0 AA E0 2A E0 50 / E0 D0 E0 AA E0 2A E0 49 / E0 C9 E0 AA E0 2A E0 51 / E0 D1 E0 AA E0 2A E0 4D / E0 CD E0 AA 9.25.2001
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* This specification are subject to be changed without notice.
EM83055H
KEYBOARD ENCODER
Key (/) Key PRINT
Scan Code Make/Break E0 35 / E0 B5 Scan Code Make/Break E0 2A E0 37 / E0 B7 E0 AA
Shift Case Make/Break @3 E0 AA E0 35 / E0 B5 E0 2A Ctrl Case, Shift Case Make/ Break E0 37 / E0 B7 Alt Case Make/Break 54 / D4
Key PAUSE @4 Note .
Make Code E1 1D 45 E1 9D C5
Ctrl Key Pressed E0 46 E0 C6
@1 : 101-key keyboard only. @2 : 102-key keyboard only. @3 : If the left Shift key is held down, the AA/2A shift make and break is sent with the other scan codes. If the right Shift key is held down, B6/36 is sent. If both Shift keys are down, both sets of codes are sent with the other scan code. @4 : This key is not typematic. All associated scan codes occur on the make of the key. scan code set 2 Key (~) 1 2 3 4 5 6 7 8 9 0 -(-) =(+) BACK SPACE TAB Q W E R T Y U I O P [({) ](}) \( )@5 Make code 0E 16 1E 26 25 2E 36 3D 3E 46 45 4E 55 66 0D 15 1D 24 2D 2C 35 3C 43 44 4D 54 5B 5D Break code F0 0E F0 16 F0 1E F0 26 F0 25 F0 2E F0 36 F0 3D F0 3E F0 46 F0 45 F0 4E F0 55 F0 66 F0 0D F0 15 F0 1D F0 24 F0 2D F0 2C F0 35 F0 3C F0 43 F0 44 F0 4D F0 54 F0 5B F0 5D Key X C V B N M ,(<) .(>) /(?) SHIFT_R CTRL_L ALT_L SPACE ALT_R CTRL_R NUM (7) (4) (1) (8) (5) (2) (0) (*) (9) (6) (3) (DEL) Make code 22 21 2A 32 31 3A 41 49 4A 59 14 11 29 E0 11 E0 14 77 6C 6B 69 75 73 72 70 7C 7D 74 7A 71 Break code F0 22 F0 21 F0 2A F0 32 F0 31 F0 3A F0 41 F0 49 F0 4A F0 59 F0 14 F0 11 F0 29 E0 F0 11 E0 F0 14 F0 77 F0 6C F0 6B F0 69 F0 75 F0 73 F0 72 F0 70 F0 7C F0 7D F0 74 F0 7A F0 71 9.25.2001
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* This specification are subject to be changed without notice.
EM83055H
KEYBOARD ENCODER
Key CAPS A S D F G H J K L ;(:) '(") K42 @6 ENTER SHIFFT_L K45 @6 Z Key
Make code 58 1C 1B 23 2B 34 33 3B 42 4B 4C 52 5D 5A 12 61 1A
Break code F0 58 F0 1C F0 1B F0 23 F0 2B F0 34 F0 33 F0 3B F0 42 F0 4B F0 4C F0 52 F0 5D F0 5A F0 12 F0 61 F0 1A
Key (-) (+) (ENTER) ESC F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 SCROLL Shift Case @7 Make/Break E0 F0 12 E0 70 / E0 F0 70 E0 12 E0 F0 12 E0 71 / E0 F0 71 E0 12 E0 F0 12 E0 6B / E0 F0 6B E0 12 E0 F0 12 E0 6C / E0 F0 6C E0 12 E0 F0 12 E0 69 / E0 F0 69 E0 12 E0 F0 12 E0 75 / E0 F0 75 E0 12 E0 F0 12 E0 72 / E0 F0 72 E0 12 E0 F0 12 E0 7D / E0 F0 7D E0 12 E0 F0 12 E0 7A / E0 F0 7A E0 12 E0 F0 12 E0 74 / E0 F0 74 E0 12
Make code 7B 79 E0 5A 76 05 06 04 0C 03 0B 83 0A 01 09 78 07 7E
Break code F0 7B F0 79 E0 F0 5A F0 76 F0 05 F0 06 F0 04 F0 0C F0 03 F0 0B F0 83 F0 0A F0 01 F0 09 F0 78 F0 07 F0 7E
INS DEL LEFT HOME END UP DOWN PAGE UP PAGE DOWN RIGHT
Base Case,or Shift + Nun Lock Make/Break E0 70 / E0 F0 70 E0 71 / E0 F0 71 E0 6B / E0 F0 6B E0 6C / E0 F0 6C E0 69 / E0 F0 69 E0 75 / E0 F0 75 E0 72 / E0 F0 72 E0 7D / E0 F0 7D E0 7A / E0 F0 7A E0 74 / E0 F0 74
Num Lock Make/Break E0 12 E0 70 / E0 F0 70 E0 F0 12 E0 12 E0 71 / E0 F0 71 E0 F0 12 E0 12 E0 6B / E0 F0 6B E0 F0 12 E0 12 E0 6C / E0 F0 6C E0 F0 12 E0 12 E0 69 / E0 F0 69 E0 F0 12 E0 12 E0 75 / E0 F0 75 E0 F0 12 E0 12 E0 72 / E0 F0 72 E0 F0 12 E0 12 E0 7D / E0 F0 7D E0 F0 12 E0 12 E0 7A / E0 F0 7A E0 F0 12 E0 12 E0 74 / E0 F0 74 E0 F0 12
Key (/) Key PRINT
Scan Code Make/Break E0 4A / E0 F0 4A Scan Code Make/Break E0 12 E0 7C / E0 F0 7C E0 F0 12
Shift Case Make/Break @7 E0 F0 12 E0 4A / E0 F0 4A E0 12 Alt Case Make/Break 84 / F0 84 9.25.2001
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Ctrl Case, Shift Case Make/ Break E0 7C / E0 F0 7C
* This specification are subject to be changed without notice.
EM83055H
KEYBOARD ENCODER
Key PAUSE @8 Note .
Make Code E1 14 77 E1 F0 14 F0 77
Ctrl Key Pressed E0 7E E0 F0 7E
@5 : 101-key keyboard only. @6 : 102-key keyboard only. @7 : If the left Shift key is held down, the F0 12/12 shift make and break is sent with the other scan codes. If the right Shift key is held down, F0 59/59 is sent. If both Shift keys are down, both sets of codes are sent with the other scan code. @8 : This key is not typematic. All associated scan codes occur on the make of the key. scan code set 3 Key (~) 1 2 3 4 5 6 7 8 9 0 -(_) =(+) BACK SPACE TAB Q W E R T Y U I O P [({) ](}) \( ) @9 CAPS A S D F G H Make Code 0E 16 1E 26 25 2E 36 3D 3E 46 45 4E 55 66 0D 15 1D 24 2D 2C 35 3C 43 44 4D 54 5B 5C 14 1C 1B 23 2B 34 33 Break Code F0 0E F0 16 F0 1E F0 26 F0 25 F0 2E F0 36 F0 3D F0 3E F0 46 F0 45 F0 4E F0 55 F0 66 F0 0D F0 15 F0 1D F0 24 F0 2D F0 2C F0 35 F0 3C F0 43 F0 44 F0 4D F0 54 F0 5B F0 5C F0 14 F0 1C F0 1B F0 23 F0 2B F0 34 F0 33 Default Key State Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Make/Break Typematic Typematic Typematic Typematic Typematic Typematic 9.25.2001
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* This specification are subject to be changed without notice.
EM83055H
KEYBOARD ENCODER
Key J K L ;(:) '(") K42 @10 ENTER SHIFT_L K45 @10 Z X C V B N M ,(<) .(>) /(?) SHIFT_R CTRL_L ALT_L SPACE ALT_R CTRL_R INS DEL LEFT HOME END UP DOWN PAGE UP PAGE DOWN RIGHT NUM (7) (4) (1) (/) (8) (5) (2) (0) (*) (9) (6) (3)
Make Code 3B 42 4B 4C 52 53 5A 12 13 1A 22 21 2A 32 31 3A 41 49 4A 59 11 19 29 39 58 67 64 61 6E 65 63 60 6F 6D 6A 76 6C 6B 69 77 75 73 72 70 7E 7D 74 7A
Break Code F0 3B F0 42 F0 4B F0 4C F0 52 F0 53 F0 5A F0 12 F0 13 F0 1A F0 22 F0 21 F0 2A F0 32 F0 31 F0 3A F0 41 F0 49 F0 4A F0 59 F0 11 F0 19 F0 29 F0 39 F0 58 F0 67 F0 64 F0 61 F0 6E F0 65 F0 63 F0 60 F0 6F F0 6D F0 6A F0 76 F0 6C F0 6B F0 69 F0 77 F0 75 F0 73 F0 72 F0 70 F0 7E F0 7D F0 74 F0 7A
Default Key State Typematic Typematic Typematic Typematic Typematic Typematic Typematic Make/Break Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Make/Break Make/Break Make/Break Typematic Make only Make only Make only Typematic Typematic Make only Make only Typematic Typematic Make only Make only Typematic Make only Make only Make only Make only Make only Make only Make only Make only Make only Make only Make only Make only Make only 9.25.2001
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* This specification are subject to be changed without notice.
EM83055H
KEYBOARD ENCODER
Key (DEL) (-) (+) (ENTER) ESC F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 PRINT SCROLL PAUSE Note .
Make Code 71 84 7C 79 08 07 0F 17 1F 27 2F 37 3F 47 4F 56 5E 57 5F 62
Break Code F0 71 F0 84 F0 7C F0 79 F0 08 F0 07 F0 0F F0 17 F0 1F F0 27 F0 2F F0 37 F0 3F F0 47 F0 4F F0 56 F0 5E F0 57 F0 5F F0 62
Default Key State Make only Make only Typematic Make only Make only Make only Make only Make only Make only Make only Make only Make only Make only Make only Make only Make only Make only Make only Make only Make only
@9 : 101-key keyboard only @10 : 102-key keyboard only
New key codes for scan set 1: New key LWIN RWIN APP N-CHG (131) CHG (132) ROMA (133) K14 K56 K107 KL KR POWER SLEEP WAKE UP Make 5B 5C 5D 7B 79 70 7D 73 7E F1 F0 E0 5E E0 5F E0 63 E0 E0 E0 Break DB DC DD FB F9 F0 FD F3 FE X X E0 DE E0 DF E0 E3 E0 E0 E0
* This specification are subject to be changed without notice.
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New key codes for scan set 2: New key LWIN RWIN APP N-CHG (131) CHG (132) ROMA (133) K14 K56 K107 KL KR POWER SLEEP WAKE UP New key codes for scan set 3: New key LWIN RWIN APP N-CHG (131) CHG (132) ROMA (133) K14 K56 K107 KL KR POWER SLEEP WAKE UP Windows 2000 Multi-Media key Code. K130 : WWW Back K131 : WWWForward K132 : WWWstop K133 : WWWRefresh K134 : WWWSearch K135 : WWWFavorites K136 : WWWWeb/Home K137 : Mail K138 : Mute K139 : VolumeK140 : Volume+ K141 : Play/Pause K142 : Stop K143 : PreTrack K144 : Nexttrack K145 : Media Select K146 : MyComputer K147 : Calculator SET1 MAKE E06A E069 E068 E067 E065 E066 E032 E06C E020 E02E E030 E022 E024 E010 E019 E06D E06B E021 BREAK E0EA E0E9 E0E8 E0E7 E0E5 E0E6 E0B2 E0EC E0A0 E0AE E0B0 E0A2 E0A4 E090 E099 E0ED E0EB E0A1 SET2 MAKE E038 E030 E028 E020 E010 E018 E03A E048 E023 E021 E032 E034 E03B E015 E04D E050 E040 E02B BREAK E0F038 E0F030 E0F028 E0F020 E0F010 E0F018 E0F03A E0F048 E0F023 E0F021 E0F032 E0F034 E0F03B E0F015 E0F04D E0F050 E0F040 E0F02B 9.25.2001
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Make 1F 27 2F 67 64 13 6A 51 6D F1 F2 E0 37 E0 3F E0 5E E0 E0 E0
Break F0 F0 F0 F0 67 F0 64 F0 13 F0 6A F0 51 F0 6D X X E0 F0 E0 F0 E0 F0 E0 E0 E0
1F 27 2F
37 3F 5E
Make 8B 8C 8D 85 86 87 5D 51 7B F1 F2 X X X
Break F0 F0 F0 F0 F0 F0 F0 F0 F0 X X X X X 8B 8C 8D 85 86 87 5D 51 7B MAKE/BREAK MAKE/BREAK MAKE/BREAK MAKE MAKE MAKE TYPEMATIC TYPEMATIC TYPEMATIC
* This specification are subject to be changed without notice.
EM83055H
KEYBOARD ENCODER
Turbo Function: Fn+ F1 F2 F3 F4 F5 2.1hz 4.2hz 7.2hz 16.3hz 21hz F6 F7 F11 30hz 46hz keyLoak
Internal-Multikey Function 1: Multi-Media Function Pad_2 VolumePad_3 Play/Pause Pad_4 PreTrack Pad_5 Media Pad_6 NextTrack Pad_7 Mute Pad_8 Volume+ Pad_9 Stop Internal Function Pad_Enter Web/Home Pad_+ Mail Pad_Favorites Pad_. Search Right Arrow Forward left Arrow Back Down Arrow Stop Up Arrow Refresh O.S. Function Pad_0 MyComputer Pad_1 Calculator
Fn+ (M/Mode)
E
Eur Key
Internal-Multikey Function 2: Multi-Media Function Pad_Enter VolumeDown Play/Pause Left PreTrack F9 Media Right NextTrack F12 Mute Pad_+ Volume+ Up Stop Internal Function F1 Web/Home F8 Mail F2 Favorites F3 Search F6 Forward F7 Back F5 Stop F4 Refresh O.S. Function F10 MyComputer F11 Calculator
Fn+ (M/Mode)
E
Eur Key
* This specification are subject to be changed without notice.
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K130
K131
K132
K133
K134
K135
K136
K137
K138
K139
K140
K141
K142
K143
K144
K145
ESC
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
PRINT
SCROLL
PAUSE
K146
K147
(~) `
1
2
3
4
5
6
7
8
9
10
(_) -
(+) =
SPACE
INS
HOME
PAGE UP
NUM
(/)
(*)
(-)
TAB
Q
W
E
R
T
Y
U
I
O
P
[({)
](})
\( )
DEL
END
PAGE DOWN
(7)
(8)
(9) (+)
CAPS
A
S
D
F
G
H
J
K
L
;(:)
'(")
ENTER
(4)
(5)
(6)
SHIFT_L
Z
X
C
V
B
N
M
,(<)
.(>)
/(?)
SHIFT_R
UP
(1)
(2)
(3)
(ENTER)
CTRL_L
ALT_L
SPACE
ALT_R
CTRL_R
LEFT
DOWN
RIGHT
(0)
(*)
Fig 1. The Windows 2000 keyboard layout
F9 F10 F11 F12
POWER SLEEP
WAKE UP
ESC
F1
F2
F3
F4
F5
F6
F7
F8
(~) `
1
2
3
4
5
6
7
8
9
10
(_) -
(+) =
PRINT SPACE INS
SCROLL
PAUSE
NUM HOME END
PAGE UP PAGE DOWN
(/)
(*)
(-)
TAB
Q
W
E
R
T
Y
U
I
O
P
[({)
](})
\( )
DEL
(7)
(8)
(9) (+)
CAPS
A
S
D
F
G
H
J
K
L
;(:)
'(")
ENTER
(4)
(5)
(6)
SHIFT_L
Z
X
C
V
B
N
M
,(<)
.(>)
/(?)
SHIFT_R
APP
UP
(1)
(2)
(3)
(ENTER)
CTRL_L
LWIN
ALT_L
SPACE
ALT_R
RWIN
CTRL_R
LEFT
DOWN
RIGHT
(0)
(*)
Fig 2. The 107-key keyboard layout
ESC
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
PRINT
SCROLL
PAUSE
(~) `
1
2
3
4
5
6
7
8
9
10
(_) -
(+) =
SPACE
INS
HOME
PAGE UP
NUM
(/)
(*)
(-)
TAB
Q
W
E
R
T
Y
U
I
O
P
[({)
](})
\( )
DEL
END
PAGE DOWN
(7)
(8)
(9) (+)
CAPS
A
S
D
F
G
H
J
K
L
;(:)
'(")
ENTER
(4)
(5)
(6)
SHIFT_L
Z
X
C
V
B
N
M
,(<)
.(>)
/(?)
SHIFT_R
APP
UP
(1)
(2)
(3)
(ENTER)
CTRL_L
LWIN
ALT_L
SPACE
ALT_R
RWIN
CTRL_R
LEFT
DOWN
RIGHT
(0)
(*)
Fig 3. The 104-key keyboard layout
* This specification are subject to be changed without notice.
9.25.2001
16
EM83055H
KEYBOARD ENCODER
ABSOLUTE MAXIMUM RATINGS
Parameter Supply Voltage Input Voltage Output Voltage Temperature under bias Storage temperature Sym. VCC VIN VOUT TB TS Ratings -0.5V to +7V -0.3V to +6V -0.3V to +6V 0C to 70C -65C to 150C
DC ELECTRICAL CHARACTERISTICS
Parameter Operating voltage Operating supply current Input leakage Input high voltage Input low voltage Output low voltage Output low voltage for LEDS Internal Pull-high resistance ( port 6,9 ) Internal Pull-high resistance for DATA, CLK Output low voltage for DATA CLK Sym. VCC ICCI IIN VIH VIL VOL1 VOL2 RPH1 RPH2 VOL3 Min. Typ. 4.5 5 Max. 5.5 3 1 2.0 0.8 0.4 3.2 23 3 0.4 Unit V mA A V V V V K K V Fosc=1.8432MHz VIN=VCC ,VSS Condition
12 1.5
2.2
IOL1 = 3.0 mA IOL2 = 10 mA VPH1 = 0V VPH2 = 0V IOL3 = 5 mA
AC ELECTRICAL CHARACTERISTICS
Parameter Time from DATA transition to falling edge of CLK Time from rising edge of CLK to DATA transition Duration of CLK inactive Duration of CLK active Time to auxiliary device inhibit after clock 11 to ensure the auxiliary device does not start another transmission Time from inactive to active CLK transition, used to time when auxiliary device samples DATA System clock Sym. T1 T2 T3 T4 T5 T6 FCLK Min. 5 5 30 30 Typ. Max. 25 T4 - 5 50 50 50 25 1.843 Unit S S S S S S MHz
40 40
5
* This specification are subject to be changed without notice.
9.25.2001
17
EM83055H
KEYBOARD ENCODER
TIMING DIAGRAMS
1ST CLK
T3 T1 T2 T4
CLK
2nd CLK
10th CLK
11th CLK
T5
DATA
Start Bit
Bit 0
Parity Bit
Stop Bit
Fig 3. Keyboard output data timings
1ST CLK
T3 T4 T6
I/O Inhibit
2nd CLK
9th CLK
10th CLK
11th CLK
CLK
DATA
Start Bit
Bit 0
Parity Bit
Stop Bit
Fig 4. Keyboard input data timings
* This specification are subject to be changed without notice.
9.25.2001
18
EM83055H
KEYBOARD ENCODER
APPLICATION CIRCUIT
VCC
CAPS LED DATA CLK C1 51K NUM LED
SCROLL LED
P90 CLK DATA OSCO GND
39 38 37
5 4 3 2 1
R_OSCI VDD CAPS
R3 VCC R
P91 P92 P93 P94 LED P95 P50 C3 P51 C4 P52 C5 P53 C6 P54 C7
C2
6 7 8 9 10 11 12 13 14 15
EM83055H
36 35 34 33 32 31 30 29 28 27
NUM SCROLL P67 P66 P65 P64 P63 P62 P61 P60
R7 R6 R5 R4 R3 R2 R1 R0
InternalMulti Func. 2 InternalMulti Func. 1 Turbo func. C14 C13 C12
P55 P56 P57 P80 P81 P82 P83 P84 P85 P86 P87
16 17 18 19 20 21 22 23 24 25 26
C17 C16 C0 C9 C11 C15 C10 C8
* This specification are subject to be changed without notice.
9.25.2001
19
EM83055H
KEYBOARD ENCODER
R0 C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17
PAUSE 126 Q 017 W 018 E 019 R 020 U 023 I 024 O 025 P 026 SCROLL 125 K14 014 7 (K) 091 8 (K) 096 9 (K) + (K) 101 106 4 (K) 5 (K) 6 (K)
R1
POWER TAB 016 CAP 030 F3 114 T 021 Y 022 ](}) 028 F7 118 [({) 027
R2
R3
SLEEP
R4
CTRL-R 064 Z 046 X 047 C 048 V
R5
WAKE UP N-CHG 131 CHG 132 ROMA 133 B 050 N 051 K56 056 APP APP /(?) 055 ALT-R 062 F12 123 084 089 105 079 NextTrack
R6
CTRL-L 058 `(~) 001 F1 112 F2 113 5(%) 006 6(^) 007 +`(=) 013 F8 119 _(-) 012
R7
F5 116 1(!) 002 2(@) 003 3(#) 004 4($) 005 7(&) 008 8(*) 009 9(')') 010 0(')') 011 PRINT 124
A 031 S 032 D 033 F 034 J 037 K 038 L 039 ;(:) 040 Fn
ESC 110 K45 045 F4 115 G 035 H 036 F6 117
049 M 052 ,(<) 053 .(>) 054 K42 042 M/Mode ENTER 043 NUM 090 / (K) 095 * (K) 100 Play/Pause Volume+ WWWBack Stop
'(") 041 ALT-L 060 F11 122 SPACE 061 0 (K) 099 (K) 104 083
Volume-
BACK 015 092 097 102
\(|) 029 1 (K) 093 2 (K) 098 3 (K) 103 ENTER (K) 108 SHIFT-R 057
WWWForward
F9 120 DEL 076 INS 075 PAGE UP 085 HOME 080 PrevTrack Mute
F10 121 POWER SLEEP PAGE DOWN 086 END 081 Media WWWSearch K151
K107 SHIFT-L 044
wake up
Mail K150 (KC-L)
WWWstop
WIN-L
WWWFavorite
WWWRefresh Calculator
WIN-R
MyCpmputer
Web/Home
(KC-R)
* This specification are subject to be changed without notice.
9.25.2001
20
EM83055H
KEYBOARD ENCODER
PAD DIAGRAM
DATAIO CLKIO OSCO OSCI
39
GND
4 P90 P91 P92 P93 P94 P95 P50 P51 P52 P53 P54 5 6 7 8 9 10 11 12 13 14 15
3
2
1
38 37 36 35 34 33 32 P70 P71 P72 P67 P66 P65 P64 P63 P62 P61 P60
(0,0)
VDD
31 30 29 28 27
EM83055H
16
17
18
19
20
21
22
23
24
25
26
P55
P56
P57
P80
P81
P82
P83
P84
P85
P86
Pad No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Symbol GND OSCO DATA CLK P90 P91 P92 P93 P94 P95 P50 P51 P52 P53 P54 P55 P56 P57 P80 P81 P82 P83 P84 P85 P86
X 197.9 -220.2 -353.1 -476.3 -659.8 -659.8 -659.8 -659.8 -659.8 -659.8 -659.8 -659.8 -659.8 -659.8 -659.8 -521.0 -401.3 -281.6 -161.9 -42.3 77.3 197.0 316.7 436.4 556.1
P87
Y 720.4 715.2 728.1 728.1 623.2 503.5 383.9 264.3 144.6 25.0 -94.7 -214.4 -334.1 -453.8 -577.9 -749.9 -749.9 -749.9 -749.9 -749.9 -749.9 -749.9 -749.9 -749.9 -749.9 9.25.2001
21
* This specification are subject to be changed without notice.
EM83055H
KEYBOARD ENCODER
Pad No. 26 27 28 29 30 31 32 33 34 35 36 37 38 39 Chip Size : 1650 x 1830 m
Symbol P87 P60 P61 P62 P63 P64 P65 P66 P67 P72 P71 P70 VDD OSCI
X 675.8 660.0 660.0 660.0 660.0 660.0 660.0 660.0 660.0 656.9 656.9 656.9 458.0 316.3
Y -749.9 -549.9 -430.3 -311.8 -192.2 -72.5 47.2 166.8 290.8 410.4 528.9 648.5 726.7 715.2
* This specification are subject to be changed without notice.
9.25.2001
22

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