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tenx MCU
> 4-bit MCU
> TM87 series
>MCU
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| TM8726 |
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4-Bit Microcontroller
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TM8726 Data Sheet (Ver 1.1) (*.pdf)
TM8726 User's Manual (English) Ver 1.1 (*.pdf)
AP Note: TM8726 electrical characteristics (*.pdf)
tenx 4-bit Summary (*.pdf)
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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.
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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: 4096 x 16 bits.
- RAM capacity: 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, 1/6 Duty, 1/7 Duty, 1/8 Duty or 1/9 Duty 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 COMS 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 (INT pin, Port IOC, IOD & KI input).
- Internal factors 4 (Pre-Divider, Timer 1, Timer 2 & RFC).
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.
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Applications:
- Timer / Calendar / Calculator / Thermometer
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