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tenx MCU
> 4-bit MCU
> TM87 series
>MCU
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| TM8723 |
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4-Bit Microcontroller
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TM8723 Data Sheet (Ver 1.3) (*.pdf)
TM8723 User's Manual (Ver 1.0) (*.pdf)
tenx 4-bit Summary (*.pdf)
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Description:
The TM8723 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, EL light, LCD driver, look-up table, watchdog timer and keyboard scanning in a signal chip.
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Feature:
1. Low power dissipation.
2. Powerful instruction set (135 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. LCD / LED driver output.
- 27 LCD / LED driver output (up to drive 135 LCD / LED segments).
- 1/2 Duty, 1/3 Duty, 1/4 Duty or 1/5 Duty for both LCD / LED selected by MASK option.
- 1/2 Bias or 1/3 Bias for LCD selected by MASK option.
- Single instruction to turn off all segments.
- Mask option is used to select SEG1~12, 21~35 as DC outputs/P_open drain.
4. Memory capacity.
- ROM capacity: 1,536 x 16 bits.
- RAM capacity: 96 x 4 bits.
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 signal chattering prevention circuitry.
6. 8 level subroutine nesting.
7. Interrupt function.
- External factors: 3 (INT pin, Port IOC & KI input).
- Internal factors: 2 (Pre-Divider, Timer1).
8. Built-in EL-light driver.
- ELC, ELP (Muxed with SEG28, SEG29)
9. Built in Alarm, Frequency or Melody generator.
- BZB, BZ (Muxed with SEG30, SEG31).
10. Built in KEY_BOARD scanning function.
- K1~K12 (Share with SEG1~SEG12).
- KI1~KI4 (Muxed with SEG32~SEG35).
11. One 6-bit programmable timer with programmable clock source.
12. Watch dog timer.
13. Build-in Voltage doubler, halver, tripler charge pump circuit.
14. Dual clock operation.
15. HALT function.
16. STOP function.
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