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tenx MCU
> 4-bit MCU
> TM87 series
>MCU
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| TM8722 |
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4-Bit Microcontroller
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TM8722 Data Sheet (Ver 1.2) (*.pdf)
TM8722 User's Manual (V1.1) (*.pdf)
AP Note: TM8722 electrical characteristics (*.pdf)
tenx 4-bit Summary (*.pdf)
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Description:
The TM8722 is an embedded high-performance 4-bit microcomputer with LCD/LED 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. Power instruction set (143 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: 2048 x 16 bits.
- RAM capacity: 128 x 4 bits.
4. LCD / LED driver output.
- 5 common outputs and 35 segment outputs (up to drive 175 LCD/LED segments).
- 1/2 Duty, 1/3 Duty, 1/4 Duty, 1/5 Duty for both LCD/LED drivers is selected by mask option.
- 1/2 Bias or 1/3 Bias for LCD driver is selected by mask option.
- Single instruction to turn off all segments.
- All segment outputs could be defined as CMOS or P_open drain output type by mask option.
5. Input / output ports.
- Port IOA: 4 pins (with internal pull-low), muxed with SEG24~27.
- Port IOB: 4 pins (with internal pull-low), muxed with SEG28~31.
- Port IOC: 4 pins (with internal pull-low / low-level-hold), muxed with SEG32~35. IOC port had built in the input signal chattering prevention circuitry.
6. 8 level subroutine nesting.
7. Interrupt function.
- External factors 3 (INT pin, Port IOC & KI input).
- Internal factors 4 (Pre-Divider, Timer 1, Timer2 & RFC).
8. Built-in EL panel driver.
- ELC, ELP (Muxed with SEG28, SEG 29).
9. Built in Alarm, clock or single tome melody generator.
- BZB, BZ (Muxed with SEG30, SEG31).
10. Built-in R to F Converter circuit.
- CX, RR, RT, RH (Muxed with SEG24~SEG27).
11. Built in key natrix scanning function.
- K1~K16 (Shared with SEG1~SEG16).
- KI1~K14 (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 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 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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