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TM8704
tenx technology
GENERAL DESCRIPTION The TM8704 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, LCD driver and look-up table in a signal chip. FEATURE 1. 1.5V operation only and with low power dissipation. 2. Powerful instruction set (129 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 1152 80 x 16 bits. x 4 bits.
4 Bit Microcontroller
4. LCD driver output. 5 common outputs and 24 segment outputs (up to drive 120 LCD segments). 1/2 Duty, 1/3 Duty, 1/4 Duty or 1/5 Duty is selected by MASK option. 1/2 Bias or 1/3 Bias is selected by MASK option. Single instruction to turn off all segments. Segment output pins (SEG1~12) could be defined as CMOS or P_open drain output type by mask option. 5. Input/output ports. Port IOA 4 pins, muxed with SEG24~SEG27. Port IOB 4 pins(with internal pull-low), muxed with SEG28~SEG31. Port IOC 4 pins(with internal pull-low), muxed with SEG32~SEG35. IOC port had built in the input signal chattering prevention circuitry. 6. 8 level subroutine nesting. 7. Interrupt function. External factor 2 Internal factors 2 (INT pin, Port IOC). (Pre-Divider, Timer1).
8. Built-in Diode for Solar Cell power regulation. 9. Built in Alarm generator.
tenx technology, inc.
Ver 1.0 03/12/01
TM8704
BZB, BZ (Muxed with SEG30,SEG31). 10. One 6-bit programmable timer with programmable clock source. 11. Built-in Voltage doubler, tripler charge pump circuit. 12. Dual clock operation. 13. HALT function. 14. STOP function. APPLICATION Timer / Calendar / Calculator
BLOCK DIAGRAM
B1-4 BZB,BZ B-PORT A-PORT ALARM 4 BITS DATA BUS INDEX ROM 256(9-N) X 8 BITS DATA RAM 80 X 4 BITS C-PORT SEGMENT PLA
A1-4
C1-4
COM1-5
SEG1-12,24-35 LCD DRIVER
VDD1-3
ALU
PRE-DIVIDER
6 BITS PRESET TIMER 1 CONTROL CIRCUIT RESET INT
8 LEVELS STACK 11 BITS PROGRAM COUNTER
INSTRUCTION DECODER MASK ROM 128N X 16 BITS
N:1->9
OSCILLATOR
CUP1,2 XTIN,OUT
2
tenx technology, inc.
Ver1.0 03/12/01
TM8704
PAD DIAGRAM
30
40 20 1
10
The substrate of chip should be connected to GND.
3
tenx technology, inc.
Ver1.0 03/12/01
TM8704
PAD COORDINATE No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name XIN XOUT GND VDD1 VDD2 VDD3 CUP1 CUP2 COM1 COM2 COM3 COM4 COM5 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 X 72.50 72.50 75.00 75.00 94.95 209.95 324.95 439.95 554.95 669.95 784.95 899.95 1014.95 1129.95 1176.85 1176.85 1176.85 1176.85 1176.85 1176.85 Y 712.85 451.35 314.05 199.05 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 72.50 187.50 309.50 431.50 553.50 675.50 797.50 No 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Name SEG8 SEG9 SEG10 SEG11 SEG12 SEG24/IOA1 SEG25/IOA2 SEG26/IOA3 SEG27/IOA4 SEG28/IOB1 SEG29/IOB2 SEG30/IOB3/BZB SEG31/IOB4/BZ SEG32/IOC1 SEG33/IOC2 SEG34/IOC3 SEG35/IOC4 RESET INT TEST X 1176.85 1176.85 1176.85 1176.85 1176.85 1176.85 1056.10 936.10 816.10 696.10 576.10 456.10 336.10 216.10 96.10 72.50 72.50 72.50 72.50 72.50 Y 919.50 1041.50 1163.50 1285.50 1407.50 1534.20 1571.30 1571.30 1571.30 1571.30 1571.30 1571.30 1571.30 1571.30 1571.30 1440.65 1325.65 1188.65 1029.85 871.65
4
tenx technology, inc.
Ver1.0 03/12/01
TM8704
PIN DESCRIPTION
Name VDD1,2,3 RESET INT I/O P I I Description LCD supply voltage, and positive supply voltage. Input pin for external reset request signal, built-in internal pull-down resistor. Input pin for external interrupt 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 pins. . Connect the CUP1 and CUP2 pins with non-polarized electrolytic capacitor when chip operated in 1/2 or 1/3 bias mode. . In no BIAS mode, leave these pins opened. Time base counter frequency (clock specified. LCD alternating frequency. Alarm signal frequency) or system clock oscillation. . 32KHz Crystal oscillator or External RC for SLOW ONLY or DUAL by mask option. . In FAST ONLY mode option, connect an external resistor could compose a RC oscillator. Output pins for driving the common pins of the LCD panel. Output pins for driving the LCD panel segment. Input / Output port A.(muxed with SEG24~27) Input / Output port B.(muxed with SEG28~30) Input / Output port C. (muxed with SEG32~35) Output port for alarm generator Negative supply voltage.
TEST CUP1,2
O
XIN XOUT
I O
COM1~5 SEG1-12,2435 IOA1-4 IOB1-4 IOC1-4 BZB/BZ GND
O O I/O I/O I/O O P
5
tenx technology, inc.
Ver1.0 03/12/01
TM8704
ABSOLOUTE MAXIMUM RATINGS
GND= 0V Name Symbol VDD1 Maximum Supply Voltage VDD2 VDD3 Maximum Input Voltage Maximum output Voltage Vin Vout1 Vout2 Maximum Operating Temperature Maximum Storage Temperature Topg Tstg Range -0.3 to 2.0 -0.3 to 4.0 -0.3 to 6.0 -0.3 to VDD1/2+0.3 -0.3 to VDD1/2+0.3 -0.3 to VDD3+0.3 -20 to +70 -25 to +125 Unit V V V V V V
POWER CONSUMPTION
at Ta=-20 to 70,GND= 0V Name HALT mode Sym. Condition Min. Typ. 2 Max. Unit uA
IHALT1 Only 32.768KHz Crystal oscillator operating, without loading. (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=0 to 70,GND= 0V Name Symb. VDD1 Supply Voltage VDD2 VDD3 Oscillator Start-Up Voltage Oscillator Sustain Voltage Input "H" Voltage Input "L" Voltage Input "H" Voltage Input "L" Voltage Operating Freq VDD1 Vih1 Vil1 Vih3 Vil3 Fopg1 Fopg2 Crystal Mode RC/CF Mode 6 OSCIN Crystal Mode 1.2 VDD1-0.7 VDD1+0.7 -0.7 0.8xVDD1 0 32 10 1000 0.7 VDD1 0.2xVDD1 V V V V V KHZ KHZ VDD1 Crystal Mode 1.3 V Condition Min. 1.2 2.4 2.4 Max. 1.8 3.6 5.4 Unit V V V
tenx technology, inc.
Ver1.0 03/12/01
TM8704
INTERNAL RC FREQUENCY RANGE
Option Mode 250KHz BAK 1.2V~1.5V 2.4V~5.0V 500KHz 1.2V~1.5V 2.4V~5.0V Min. 300KHz 200KHz 550KHz 400KHz Typ. 350KHz 250KHz 650KHz 500KHz Max. 400KHz 300KHz 750KHz 600KHz
ELECTRICAL CHARACTERISTICS
VDD1=1.2V;
Input Resistance
Name IOB,C Pull-Down Tr INT Pull-up Tr INT Pull-Down Tr RES Pull-Down Tr Symb. Rmad1 Rintu1 Rintd1 Rres1 Condition Vi=VDD1 Vi=GND Vi=VDD1 Vi=VDD1 Min. 200 200 200 100 Typ. 500 500 500 300 Max. 1000 1000 1000 500 Unit Kohm Kohm Kohm Kohm
DC Output Characteristics
Name Output "H" Voltage Symb. Voha Condition Ioh=-200uA Port SEG1~12 SEG24~35 Output "L" Voltage Vola Iol=400uA SEG1~12 SEG24~35 0.2 0.3 0.4 V Min. 0.8 Typ. 0.9 Max. 1.0 Unit V
Segment Driver Output Characteristics
Name Symb. Condition Static Display Mode Output "H" Voltage Output "L" Voltage Output "H" Voltage Output "L" Voltage Vohb Volb Vohc Volc Ioh=-1uA Iol=1uA Ioh=-10uA Iol=10uA SEG-n SEG-n COM-n COM-n 1.0 0.2 1.0 0.2 V V V V For Min. Typ. Max. Unit.
1/2 Bias Display Mode Output "H" Voltage Output "L" Voltage Output "H" Voltage Output "M" Voltage Output "L" Voltage Vohd Vold Vohe Ioh=-1uA Iol=1uA Ioh=-10uA SEG-n SEG-n COM-n COM-n COM-n 2.2 1.0 1.4 0.2 2.2 0.2 V V V V V
Vom1e Iol/h=+/-10uA Vole Iol=10uA
1/3 Bias display Mode Output "H" Voltage Vohf Ioh=-1uA 7 SEG-n 3.4 V
tenx technology, inc.
Ver1.0 03/12/01
TM8704
Output "M1" Voltage Output "M2" Voltage Output "L" Voltage Output "H" Voltage Output "M1" Voltage Output "M2" Voltage Output "L" Voltage Vom1f Iol/h=+/-10uA Vom2f Iol/h=+/-10uA Volf Vohg Iol=1uA Ioh=-10uA COM-n 3.4 1.0 2.2 1.4 2.6 0.2 1.0 2.2 1.4 2.6 0.2 V V V V V V V
Vom1g Iol/h=+/-10uA Vom2g Iol/h=+/-10uA Volg Iol=10uA
Typical Application Circuit This application circuit is simply an example, and is not guaranteed to work.
LCD Panel
15P XIN 15P 32.768KHz Crystal XOUT
COM1~5, SEG1~12, SEG24~35 CUP1
0.1u
CUP2 VDD3 VDD2
0.1u
VDD1
0.1u
0.1u 1.5V 0.1u
TM8704
RESET GND
External INT. I/O Port
INT Choke BZ(BZB)
IOA,IOB,IOC
Buzzer
Ag power mode, 1/3 Bias, 1/5 Duty
8
tenx technology, inc.
Ver1.0 03/12/01

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