View EM83811_587981.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

EM83811 EM83811
ALL-IN-ONE PLUG & PLAY SCROLLING SERIAL MOUSE CONTROLLER
inary Pr e l i m
GENERAL DESCRIPTION
The EM83811 PnP Serial Mouse Controller is specially designed to control mouse device for WINDOWS 95 system. This single chip can interface three key-switches , four X,Y photo signals and two Z direction signals to RS-232C.
FEATURES
* * * * * 1 % resistor RC oscillation. Microsoft compatible four bytes format output in 1200 baud rate. 100 bytes PnP ID code could be filled by code layer. Three key-switches, four X,Y photo-couples inputs. Three type Z direction input: 1. Photo couples input. 2. Key-switches input. 3. Voltage-sensing input. Both key-in and key-realse debounce interval 13 ms. The sampling rate of motion detector is about 65kHz. Photo-couple detector using noise immunity. RTS debouncing circuits. Three step dynamic input impedance. Using voltage comparator to detect photo-couple input. Photo couples test mode included. Built-in two zener diodes between Vdd to Vss,and RTS to Vdd. CMOS push-pull output. Package type: a. EM83811A : 16 DIP, Z-axis--photo input. b. EM83811B : 16 DIP, Z-axis--key input. c. EM83811C : 16 DIP, Z-axis--voltage input. d. EM83811D : 18 DIP, Z-axis--three type option.
* * * * * * * * * *
* This specification are subject to be changed without notice.
2.2.1998
1
EM83811
ALL-IN-ONE PLUG & PLAY SCROLLING SERIAL MOUSE CONTROLLER
PIN ASSIGNMENTS
inary P r el i m
EM83811A/B/C EM83811D
OSC.OUT Z1 Z2 RTS RXD OPT ZS1 VSS ZS2 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 VDD OSCR Y2 Y1 X2 X1 L M R
VDD OSC.OUT Z1 Z2 RTS RXD OPT V SS
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
OSCR Y2 Y1 X2 X1 L M R
FUNCTION BLOCK DIAGRAM
ZS1 ZS2
THREE TYPES SELECTOR
Z1 Z2
COMPARATOR
VOLTAGE SENSOR Z-AXIS COUNTER
KEY-SWITCH DETECTOR
RXD
OPT X1 X2 Y1 Y2
C O M P A R A T O R
D ME OT TE IC OT NO R
P/S COUNTER MULTIPLEXER
L M R
D E B O U N C E
PnP ID CODE
TIMING CONTROLLER
RTS
SYSTEM CLOCK GENERATOR
OSCR OSC.OUT
RC& CRYSTAL OSCILLATION
* This specification are subject to be changed without notice.
2.2.1998
2
EM83811
ALL-IN-ONE PLUG & PLAY SCROLLING SERIAL MOUSE CONTROLLER
PIN DESCRIPTIONS
Symbol ZS1 ZS2 I/O I
inary Pr e l i m
Function Both pins input pull high with 200kohm resistor. ZS1=1, and ZS2= 1: Z-axis selected to photo input. ZS1=0, and ZS2= 1: Z-axis selected to key input. ZS1=1, and ZS2= 0: Z-axis selected to voltage input. INPUT: 200kohm pull high to VDD. When OPT is connected to VSS, EM83810 will enter test mode. In test mode, L will be the output of X1,while M will be the output of X2. Toggling R key can change these output to be Y1,Y2 respectively. OUTPUT: 2kHz Z-axis LED driving source. " 1"= VRTS, "0"= floating . High duty is about 30us. RC oscillation use 1 % 50 Kohm resistor. 12V signal with 10mA driving. Used as EM83810 ID code output trigger signal from low (-12V) to high (+12V). While under normal operating, RTS will keep on +12V driving. EM83810 clamp it by 6V zener diode to VDD and use it as RXD positive voltage. The RTS sensing debounce time is about 15us to 30us. One report contains 4 data bytes, 7 data bits without parity in the data byte. The data byte is shifted out from LSB through MSB, started by start bit and ended by stop bit.The RXD signal swing between +6V and -6V Three key-switches inputs. 200kohm resistor pull low. Three step dynamic input impedance. Use voltage comparator to measure photo-couples "ON" ,or "OFF".
OPT
I/O
OSC.OUT OSCR RTS
O I I
RXD
O
R M L X1 X2 Y1 Y2 Z1 Z2
I
I
I
VSS VDD
Z-axis inputs. Photo mode: Three step dynamic input impedance. Voltage comparator. Key mode: 200kohm resistor pull low. Voltage mode: 200kohm resistor pull low. 8 level voltage comparator. Negative power. Connect to TXD (-12V) signal. Power line. Connect to GND.
FUNCTION DESCRIPTIONS
Operating Mode (A) Data format In microsoft mode, the transmission cycle consists of four bytes in one report. Each byte contains one start bit, 7 data bits and two stop bits. The first byte contains "L","R" key status and four bits of the two most
* This specification are subject to be changed without notice.
2.2.1998
3
EM83811
ALL-IN-ONE PLUG & PLAY SCROLLING SERIAL MOUSE CONTROLLER
significant bits in horizontal counter and vertical counter. The second byte represents the value accumulated by horizontal counter, the third byte is the data of the vertical counter. The last byte contains "M" key status and Z-axis value. The vertical data is transmited in 2's complement. Output byte arrange bit 1st 2nd 3rd 4th no. ...... byte...... byte...... byte...... byte...... 6 1 0 0 0 5 L H5 V5' 0 4 R H4 V4' M 3 V7' H3 V3' Z3 2 V6' H2 V2' Z2 1 H7 H1 V1' Z1 0 H6 H0 V0' Z0
inary P r el i m
(B) Plug & Play ID code When RTS input from low to high, EM83810 will send a string ID code. Customer can specify the contains of the code area and the length by change the code layer. Field Name Other ID Begin PnP PnP Revision EISA ID Product ID Serial Number Class ID Driver ID User Name Length <17 1 2 3 4 9 <34 <42 <42 Field Data 4D,5A,40,00,00,00 08 01,24 25,2D,23 10,10,10,11 3C 3C,2D,2F,35,33,25 3C,30,2E,30,10,26 10,21 3C,25,2D,23,00,33 23,32,2F,2C,2C,29 2E,27,00,33,25,32 29,21,2C,00,2D,2F 35,33,25 21,15 09 Description ID for legacy Begin PnP ID Version 1.00 EMC 0001 None provided MOUSE Class PnP0F0A EMC SCROLLING SER IAL MOUSE
Checksum End PnP
2 1
2 byte checksum End PnP ID
* This specification are subject to be changed without notice.
2.2.1998
4
EM83811
ALL-IN-ONE PLUG & PLAY SCROLLING SERIAL MOUSE CONTROLLER
inary Pr e l i m
ABSOLUTE MAXIMUM RATINGS
Parameter Supply voltage Temperature under bias Storage temperature Power dissipation VDD -VSS RTS-VSS Min. -0.3 -0.3 0 -65 Max. 7 14 70 150 500 Unit V V C C mW
DC ELECTRICAL CHARACTERISTICS ( TA= 25C to 70 C )
Parameter Operating voltage Operating current (Vdd=5.4V, RTS=Vdd) Operating current (Vdd=6.2V, RTS=Vdd) RTS operating current (Vdd=5.6V,RTS=11V) RTS operating current (Vdd=5.6V,RTS=12V) OPT high output voltage (Vrh=Vrts-0.4V) RXD high output voltage (Vrh=Vrts-2.6V) RXD low output voltage (Vrl=Vss+2.6V) X1,X2,Y1,Y2 referance voltage Z1,Z2 (Photo mode) X1,X2,Y1,Y2 input current (80uA) Z1,Z2 (Photo mode) X1,X2,Y1,Y2 input current (500uA) Z1,Z2 (Photo mode) RTS high input voltage RTS low input voltage L,M,R,ZS1,ZS2,OPT input low voltage Z1,Z2 (Key mode) L,M,R,ZS1,ZS2,OPT input high voltage Z1,Z2 (Key mode) Z1,Z2 (Voltage mode) sensitivity L,M,R input current Z1,Z2 (Key & voltage mode) (Vds=5.6V) ZS1,ZS2,OTP input current (Vds=0V) L,M,R,ZS1,ZS2,OPT,OSCR leakage current Z1,Z2 (Key mode) (Vds=0V) OSCR leakage current (Vds=5.6V) Sym. VDD VRTS Iop Iop Irts Irts Iop Irh Irl Vpl Vpi Vpi Vt+ VtVil Vih Vs Imi Iri Iil Iih Min. 3 4 16 2 0.7 0.8 1.5 9.6 3.5 -.3 18 -18 -1 Typ. 6 12 Max. 6.5 13 0.8 1.8 24 -2 1.2 1.3 2.1 6.8 1.5 +.3 56 -56 1 Unit. V V mA mA mA mA mA mA mA V V V V V V V V A A A A
* All voltages in above table are compared with VSS. * All parameter in above table are tested under 5.6V except operating current.
* This specification are subject to be changed without notice.
2.2.1998
5
EM83811
ALL-IN-ONE PLUG & PLAY SCROLLING SERIAL MOUSE CONTROLLER
AC ELECTRICAL CHARACTERISTICS (TA=0C to 70C) Parameters
RC oscillating frequency Key debounce Transmission time Start bit time Data bit time Stop bit time Mode code delay time Photo couple input sampling time Opt high duty Opt frequency
inary P r el i m
Sym.
Fosc Tkd Tmx Ts Td Tp Trd Tph Topt Fopt
Min.
-3.3% 11 -
Typ.
32.40 13 33.33 833.3 833.3 833.3 15 30 2
Max.
+3.3% 14 -
Unit
kHz ms ms us us us ms us us Khz
* This specification are subject to be changed without notice.
2.2.1998
6
EM83811
ALL-IN-ONE PLUG & PLAY SCROLLING SERIAL MOUSE CONTROLLER
inary Pr e l i m
TIMING DIAGRAM
(A) P/S output :
Key in/release
RXD
.. ..
Tmx
.. ..
.. ..
Tmx
..
..
(B) Bytes structure :
RXD
.. 1st .. ..
2rd ..
.. 3nd ..
.. 4nd ..
(C) Bits structure :
.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
RXD LINE Data Bit no.
0 Ts Td
1 Td
2 Td
3 Td
4 Td
5 Td
6 Td Tp Tp
0
1
(D) PnP ID code echo timing :
RTS Trd RXD
.. .. .. .. .. .. ..
4D 5A 40 00 00 00 08 Ts 0 1 2 3 4 5
.. .. .. .. .. .. .. .. ..
..
PnP ID code
09
"4D" code Bot no.
Tp
Tp
(E) Photo-couples sampling clocks
X1, X2 Y1, Y2 Z1, Z2 Tph Tph
* * * * * * * * * * * * * *
(F) OPT LED driving output
OPT Topt
**** *
Fopt
* This specification are subject to be changed without notice.
2.2.1998
7
EM83811
ALL-IN-ONE PLUG & PLAY SCROLLING SERIAL MOUSE CONTROLLER
APPLICATION CIRCUIT
inary P r el i m
10F
R
R
OSC.OUT
16 OSCR
6 RXD
7 OPT 2
1F
* This specification are subject to be changed without notice.
RXD TXD DTR SG DSR RTS
1 2 3 4 5 6 7 8 9
50K
8V SS
1
5
* 50K must be under 1 % precise resistor 2.2.1998
15
14
13
12
10
M
11
4
3
Y2
Y1
X2
X1
Z2
Z1
L
R
9
VDD
RTS
EM83811A
8
EM83811
ALL-IN-ONE PLUG & PLAY SCROLLING SERIAL MOUSE CONTROLLER
inary Pr e l i m
10F
R
OSC.OUT
6 RXD
7 OPT 2
OSCR
16
RXD TXD DTR SG DSR RTS
1 2 3 4 5 6 7 8 9
50K
8V SS
1
5
* This specification are subject to be changed without notice.
* 50K must be under 1 % precise resistor 2.2.1998
15
14
13
12
10
M
11
4
3
Y2
Y1
X2
X1
Z2
Z1
L
R
9 EM83811B
VDD
RTS
9
EM83811
ALL-IN-ONE PLUG & PLAY SCROLLING SERIAL MOUSE CONTROLLER
inary P r el i m
10F
R
OSC.OUT
6 RXD
7 OPT 2
OSCR
VDD
RTS
16
* This specification are subject to be changed without notice.
RXD TXD DTR SG DSR RTS
1 2 3 4 5 6 7 8 9
50K
8V SS
1
5
* 50K must be under 1 % precise resistor 2.2.1998
15
14
13
12
10
M
11
4
3
Y2
Y1
X2
X1
Z2
Z1
L
R
9 EM83811C
10

▲Up To Search▲

Price & Availability of EM83811

	To Download EM83811 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .