Maker : Tenx
Part No. : TM8726

  Datasheet PDF : TM8726.pdf
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www.DataSheet4U.com 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). 1 tenx technology, inc. Rev.1.1 2004/04/20 www.DataSheet4U.com 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 2 tenx technology, inc. Rev.1.1 2004/04/20 www.DataSheet4U.com 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 3 tenx technology, inc. Rev.1.1 2004/04/20 www.DataSheet4U.com 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. 4 tenx technology, inc. Rev.1.1 2004/04/20 www.DataSheet4U.com 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...

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