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TM8726
4 Bit Microcontroller
GENERAL DESCRIPTION The TM8726 is an embedded high-performance 4-bit microcomputer with LCD driver. It contains all the necessary functions, such as 4-bit parallel processing ALU, ROM, RAM, I/O ports, timer, clock generator, dual clock operation, Resistance to Frequency Converter(RFC), EL panel driver, LCD driver, look-up table, watchdog timer and key matrix scanning circuitry in a signal chip. FEATURE 1. Low power dissipation. 2. Powerful instruction set (178 instructions). Binary addition, subtraction, BCD adjust, logical operation in direct and index addressing mode. Single-bit manipulation (set, reset, decision for branch). Various conditional branch. 16 working registers and manipulation. Table look-up. LCD driver data transfer. 3. Memory capacity. ROM capacity RAM capacity 4096 x 16 bits. 512 x 4 bits.
4. LCD driver output. 9 common outputs and 41 segment outputs (up to drive 369 LCD segments). 1/2 Duty, 1/3 Duty, 1/4 Duty, 1/5 Duty, 1/6Duty, 1/7Duty, 1/8Duty or 1/9Duty is selected by MASK option. 1/2 Bias, 1/3 Bias or 1/4 Bias is selected by MASK option. Single instruction to turn off all segments. COM5~9,SEG1~41 could be defined as CMOS or P_open drain type output by mask option. 5. Input/output ports. Port IOA 4 pins (with internal pull-low), muxed with SEG24~SEG27. Port IOB 4 pins (with internal pull-low). muxed with SEG28~SEG31 Port IOC 4 pins (with internal pull-low, low-level-hold), muxed with SEG32 ~ SEG35. IOC port had built in the input signal chattering prevention circuitry. Port IOD 4 pins (with internal pull-low), muxed with SEG36 ~ SEG39. IOD port had built in the input signal chattering prevention circuitry.
6. 8 level subroutine nesting. 7. Interrupt function. External factors 4 Internal factors 4 (INT pin, Port IOC, IOD & KI input). (Pre-Divider, Timer1, Timer2 & RFC).
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TM8726
8. Built-in EL-light driver. ELC, ELP (Muxed with SEG28, SEG29). 9. Built in Alarm, clock or single tone melody generator. BZB, BZ (Muxed with SEG30, SEG31). 10. Built-in resistance to frequency converter. CX, RR, RT, RH (Muxed with SEG24 ~ SEG27). 11. Built in key matrix scanning function. K1~K16 (Shared with SEG1~SEG16). KI1~KI4 (Muxed with SEG32 ~ SEG35). 12. Two 6-bit programmable timer with programmable clock source. 13. Watch dog timer. 14. Built-in Voltage doubler, halver, tripler, quartic charge pump circuit. 15. Dual clock operation slow clock oscillation can be defined as X'tal or external RC type oscillator by mask option. fast clock oscillation can be defined as 3.58MHz ceramic resonator, internal R or external R type oscillator by mask option. 16. HALT function. 17. STOP function. APPLICATION Timer / Calendar / Calculator / Thermometer
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TM8726
BLOCK DIAGRAM
B1-4 ELC, ELP BZB,BZ B-PORT EL DRIVER ALARM A1-4 CX RR,RT,RH
C1-4 KI1~4
D1-4 COM1-9 SEG1-41 VDD1-4
A-PORT RFC
C-PORT KEY-IN
LCD DRIVER D-PORT SEGMENT PLA
4 BITS DATA BUS FREQUENCY GENERATOR INDEX ROM 256(16-N) X 8 BITS DATA RAM 512 X 4 BITS
ALU
PREDIVIDER
6 BITS PRESET TIMER 1 & 2 CONTROL CIRCUIT INT
8 LEVELS STACK 12 BITS PROGRAM COUNTER
INSTRUCTION DECODER PROGRAM ROM (2048+128N) X 16 BITS
N:0->16
OSCILLATOR
CUP0,1,2 XTIN,OUT CFIN,OUT RESET
TM8726 BLOCK DIAGRAM
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tenx technology, inc.
Rev.1.1 2004/04/20
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TM8726
PAD DIAGRAM
50
60 40
66 1
Die size : 1750um x 2580um
30
10
20
The substrate of chip should be connected to GND.
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tenx technology, inc.
Rev.1.1 2004/04/20
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TM8726
Y 1244.50 1359.50 1474.50 1589.50 1704.50 1819.50 1934.50 2049.50 2175.00 2300.00 2477.00 2507.50 2507.50 2507.50 2507.50 2507.50 2507.50 2507.50 2507.50 2507.50 2507.50 2507.50 2507.50 2477.00 2300.00 2175.00 2049.50 1934.50 1819.50 1704.50 1589.50 1474.50 1359.50
PAD COORDINATE No Name BAK 1 XIN 2 XOUT 3 CFIN 4 CFOUT 5 GND 6 VDD1 7 VDD2 8 VDD3 9 VDD4 10 CUP0 11 CUP1 12 CUP2 13 COM1 14 COM2 15 COM3 16 COM4 17 COM5 18 COM6 19 COM7 20 COM8 21 COM9 22 SEG1(K1) 23 SEG2(K2) 24 SEG3(K3) 25 SEG4(K4) 26 SEG5(K5) 27 SEG6(K6) 28 SEG7(K7) 29 SEG8(K8) 30 SEG9(K9) 31 SEG10(K10) 32 SEG11(K11) 33
X 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 89.50 204.50 319.50 434.50 549.50 669.50 789.50 909.50 1029.50 1149.50 1269.50 1389.50 1509.50 1629.50 1677.50 1677.50 1677.50 1677.50 1677.50 1677.50 1677.50 1677.50 1677.50
Y 1229.50 1114.50 999.50 884.50 769.50 654.50 539.50 424.50 309.50 194.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 197.50 322.50 439.50 554.50 669.50 784.50 899.50 1014.50 1129.50
No 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66
Name SEG12(K12) SEG13(K13) SEG14(K14) SEG15(K15) SEG16(K16) SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24/IOA1/CX SEG25/IOA2/RR SEG26/IOA3/RT SEG27/IOA4/RH SEG28/IOB1/ELC SEG29/IOB2/ELP SEG30/IOB3/BZB SEG31/IOB4/BZ SEG32/IOC1/KI1 SEG33/IOC2/KI2 SEG34/IOC3/KI3 SEG35/IOC4/KI4 SEG36/IOD1 SEG37/IOD2 SEG38/IOD3 SEG39/IOD4 SEG40 SEG41 RESET INT TEST
X 1677.50 1677.50 1677.50 1677.50 1677.50 1677.50 1677.50 1677.50 1677.50 1677.50 1677.50 1558.50 1430.45 1305.00 1164.50 1024.00 881.50 766.50 651.50 536.50 421.50 306.50 191.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50
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TM8726
PIN DESCRIPTION
Name BAK VDD1,2,3,4 I/O P P Description Positive Back-up voltage. At Li power mode, connect a 0.1u capacitor to GND. LCD supply voltage, and positive supply voltage. .In Ag Mode, connect positive power to VDD1. .In Li or ExtV power mode, connect positive power to VDD2. Input pin for external reset request signal, built-in internal pull-down resistor. Input pin for external INT request signal. . Falling edge or rising edge triggered is defined by mask option. . Internal pull-down or pull-up resistor is defined by mask option. Test signal input pin. Switching pins for supply the LCD driving voltage to the VDD1, 2,3,4 pins. . Connect the CUP0, CUP1 and CUP2 pins with non-polarized electrolytic capacitors when chip operated in 1/2, 1/3 or 1/4 bias mode. . In no BIAS mode application, leave these pins opened. Time base counter frequency (clock specified. LCD alternating frequency. Alarm signal frequency) or system clock oscillation. . The usage of 32KHz Crystal oscillator or external RC oscillator is defined by mask option. System clock oscillation for FAST clock only or DUAL clock operation. . The usage of 3.58MHz ceramic/resonator oscillator or external R type oscillator is defined by mask option Output pins for driving the common pins of the LCD panel. COM5~9 could be defined as COMS or Open Drain type output. Output pins for driving the LCD panel segment. Input / Output port A, (muxed with SEG24~27) Input / Output port B, (muxed with SEG28~31) Input / Output port C, (muxed with SEG32~35) Input / Output port D, (muxed with SEG36~39) 1 input pin and 3 output pins for RFC application. (muxed with SEG24~27) Output port for El panel driver. (muxed with SEG28~29) Output port for alarm, clock or single tone melody generator. (muxed with SEG30~31) Output port for key matrix scanning.(Shared with SEG1~SEG16) Input port for key matrix scanning.(Muxed with SEG32~SEG35) Negative supply voltage.
RESET INT
I I
TEST CUP0,1,2
O
XIN XOUT
I O
CFIN CFOUT COM1~9 SEG1-41 IOA1-4 IOB1-4 IOC1-4 IOD1~4 CX RR/RT/RH ELC/ELP BZB/BZ K1~K16 KI1~4 GND
I O O O I/O I/O I/O I/O I O O O O I P
ABSOLOUTE MAXIMUM RATINGS
GND= 0V Symbol VDD1 Maximum Supply Voltage VDD2 VDD3 VDD4 Maximum Input Voltage Vin Maximum output Voltage Vout1 Vout2 Vout3 Maximum Operating Temperature Topg Maximum Storage Temperature Tstg Name Range -0.3 to 5.5 -0.3 to 5.5 -0.3 to 8.5 -0.3 to 8.5 -0.3 to VDD1/2+0.3 -0.3 to VDD1/2+0.3 -0.3 to VDD3+0.3 -0.3 to VDD4+0.3 -20 to +70 -25 to +125 Unit V V V V V V V V
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TM8726
POWER CONSUMPTION
at Ta=-20 to 70,GND= 0V Name Sym. Condition Min. Typ. Max. Unit HALT mode IHALT1 Only 32.768KHz Crystal oscillator 2 uA operating, without loading. Ag mode, VDD1=1.5V, BCF = 0 IHALT2 Only 32.768KHz Crystal oscillator 2 uA operating, without loading. Li mode, VDD2=3.0V, BCF = 0 STOP mode ISTOP 1 uA Note : When RC oscillator function is operating, the current consumption will depend on the frequency of oscillation.
ALLOWABLE OPERATING CONDITIONS
at Ta=-20 to 70,GND= 0V Name Symb. VDD1 Supply Voltage VDD2 VDD3 VDD4 Oscillator Start-Up Voltage VDDB Oscillator Sustain Voltage VDDB Supply Voltage VDD1 Supply Voltage VDD2 Input "H" Voltage Vih1 Input "L" Voltage Vil1 Input "H" Voltage Vih2 Input "L" Voltage Vil2 Input "H" Voltage Vih3 Input "L" Voltage Vil3 Input "H" Voltage Vih4 Input "L" Voltage Vil4 Input "H" Voltage Vih5 Input "L" Voltage Vil5 Input "H" Voltage Vih6 Input "L" Voltage Vil6 Operating Freq Fopg1 Fopg2 Fopg3 Condition Min. 1.2 2.4 2.4 2.4 1.3 Max. 5.25 5.25 8.0 8.0 Unit V V V V V V V V V V V V V V V V V V V V KHZ KHZ KHz
Crystal Mode Crystal Mode Ag Mode EXT-V, Li Mode Ag Battery Mode
1.2 1.2 2.4 VDD1-0.7 -0.7 VDD2-0.7 Li Battery Mode -0.7 0.8xVDD1 OSCIN at Ag Battery Mode 0 0.8xVDD2 OSCIN at Li Battery Mode 0 CFIN at Li Battery 0.8xVDD2 or EXT-V Mode 0 0.8xVDDO RC Mode 0 Crystal Mode 32 RC Mode 10 CF Mode 1000
1.65 5.25 VDD1+0.7 0.7 VDD2+0.7 0.7 VDD1 0.2xVDD1 VDD2 0.2xVDD2 VDD2 0.2xVDD2 VDDO 0.2xVDDO 1000 3580
ALLOWABLE OPERATING FREQUENCY
at Ta=-20 to 70,GND= 0V
Condition BAK=1.5V (VDD1) BAK=3V (VDD2)
Max, Operating Frequency 800KHz 4MHz
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tenx technology, inc.
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TM8726
INTERNAL RC FREQUENCY RANGE
Option Mode 250KHz 500KHz BAK 1.5V 3.0V 1.5V 3.0V Min. 200KHz 200KHz 450KHz 400KHz Typ. 300KHz 250KHz 600KHz 500KHz Max. 400KHz 300KHz 750KHz 600KHz
ELECTRICAL CHARACTERISTICS
at#1:VDD1=1.2V(Ag); at#2:VDD2=2.4V(Li): at#3:VDD2=4V(Ext-V);
Input Resistance
Name "L" Level Hold Tr(IOC) Symb. Condition Rllh1 Vi=0.2VDD1,#1 Rllh2 Vi=0.2VDD2,#2 Rllh3 Vi=0.2VDD2,#3 Rmad1 Vi=VDD1,#1 Rmad2 Vi=VDD2,#2 Rmad3 Vi=VDD2,#3 Rintu1 Vi=VDD1,#1 Rintu2 Vi=VDD2,#2 Rintu3 Vi=VDD2,#3 Rintd1 Vi=GND,#1 Rintd2 Vi=GND,#2 Rintd3 Vi=GND,#3 Rres1 Vi=GND or VDD1,#1 Rres2 Vi=GND or VDD2,#2 Rres3 Vi=GND or VDD2,#3 Min. 10 10 5 200 200 100 200 200 100 200 200 100 10 10 10 Typ. 40 40 20 500 500 250 500 500 250 500 500 250 40 40 40 Max. 100 100 50 1000 1000 500 1000 1000 500 1000 1000 500 100 100 100 Unit Kohm Kohm Kohm Kohm Kohm Kohm Kohm Kohm Kohm Kohm Kohm Kohm Kohm Kohm Kohm
IOC Pull-Down Tr
INT Pull-up Tr
INT Pull-Down Tr
RES Pull-Down R
DC Output Characteristics
Name Output "H" Voltage Symb. Voh1c Voh2c Voh3c Vol1c Vol2c Vol3c Condition Ioh=-200uA,#1 Ioh=-1mA,#2 Ioh=-3mA,#3 Iol=400uA,#1 Iol=2mA,#2 Iol=6mA,#3 Port COM5~9 SEG1~41 Min. 0.8 1.5 2.5 0.2 0.3 0.5 Typ. 0.9 1.8 3.0 0.3 0.6 1.0 Max. 1.0 2.1 3.5 0.4 0.9 1.5 Unit V V V V V V
Output "L" Voltage
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TM8726
Segment Driver Output Characteristics
Name Symb. Voh1d Voh2d Voh3d Vol1d Vol2d Vol3d Voh1e Voh2e Voh3e Vol1e Vol2e Vol3e Voh12f Voh3f Vol12f Vol3f Voh12g Voh3g Vom12g Vom3g Voh12h Voh3h Vom1h Vom13h Vom22h Vom23h Vol12h Vol3h Voh12i Voh3i Vom12i Vom13i Vom22i Vom23i Vol12i Vol3i Voh12j Vom22j Vol12j Voh12k Vom12k Vom22k Vol12k Condition For Static Display Mode Ioh=-1uA,#1 Ioh=-1uA,#2 SEG-n Ioh=-1uA,#3 Iol=1uA,#1 Iol=1uA,#2 Iol=1uA,#3 Ioh=-10uA,#1 Ioh=-10uA,#2 COM-n Ioh=-10uA,#3 Iol=10uA,#1 Iol=10uA,#2 Iol=10uA,#3 1/2 Bias Display Mode Ioh=-1uA,#1,#2 SEG-n Ioh=-1uA,#3 Iol=1uA,#1,#2 Iol=1uA,#3 Ioh=-10uA,#1,#2 COM-n Ioh=-10uA,#3 Iol/h=+/-10uA,#1,#2 COM-n Iol/h=+/-10uA,#3 1/3 Bias display Mode Ioh=-1uA,#1,#2 Ioh=-1uA,#3 Iol/h=+/-10uA,#1,#2 SEG-n Iol/h=+/-10uA,#3 Iol/h=+/-10uA,#1,#2 Iol/h=+/-10uA,#3 Iol=1uA,#1,#2 Iol=1uA,#3 Ioh=-10uA,#1,#2 Ioh=-10uA,#3 Iol/h=+/-10uA,#1,#2 COM-n Iol/h=+/-10uA,#3 Iol/h=+/-10uA,#1,#2 Iol/h=+/-10uA,#3 Iol=10uA,#1,#2 Iol=10uA,#3 1/4 Bias display Mode Ioh=-1uA,#1,#2 Iol/h=+/-10uA,#1,#2 SEG-n Iol=1uA,#1,#2 Ioh=-10uA,#1,#2 Iol/h=+/-10uA,#1,#2 COM-n Iol/h=+/-10uA,#1,#2 Iol=10uA,#1,#2 Min. 1.0 2.2 3.8 0.2 0.2 0.2 1.0 2.2 3.8 0.2 0.2 0.2 2.2 3.8 0.2 0.2 2.2 3.8 1.0 1.8 3.4 5.8 1.0 1.8 2.2 3.8 Typ. Max. Unit. V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Output "H" Voltage
Output "L" Voltage
Output "H" Voltage
Output "L" Voltage
Output "H" Voltage Output "L" Voltage Output "H" Voltage Output "M" Voltage
1.4 2.2
Output "H" Voltage Output "M1" Voltage Output "M2" Voltage Output "L" Voltage Output "H" Voltage Output "M1" Voltage Output "M2" Voltage Output "L" Voltage
1.4 2.2 2.6 4.2 0.2 0.2
3.4 5.8 1.0 1.8 2.2 3.8
1.4 2.2 2.6 4.2 0.2 0.2
Output "H" Voltage Output "M2" Voltage Output "L" Voltage Output "H" Voltage Output "M1" Voltage Output "M3" Voltage Output "L" Voltage
4.6 2.2 4.6 1.0 3.4
2.6 0.2 1.4 3.8 0.2
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tenx technology, inc.
Rev.1.1 2004/04/20
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TM8726
TYPICAL APPLICATION CIRCUIT
This application circuit is simply an example, and is not guaranteed to work.
LCD Panel
3.58MHz Crystal CFIN CFOUT
COM1~9, SEG1~23,40,41 CUP0
0.1uf
CUP1 15 P 15 P
0.1uf
XIN 32.768KHz Crystal XOUT
CUP2 VDD4 VDD3 VDD2
RH RT
VDD1 BAK
0.1u
0.1u
0.1u 3.0V 0.1u 0.1uf
RR CX GND
TM8726
0.1 u
L ELP RESET EL Plant
External INT.
INT
ELC
I/O Port
IOD BZ(BZB)
Choke
Buzzer
K1~K16
KI1~KI4
Key Scanning
Key Matrix
Li power mode, 1/4 Bias, 1/9 Duty
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