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tenx MCU
> 4-bit MCU
> TM87 series
>MCU
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| TM8795 (OTP) |
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4-Bit Microcontroller (One Time PROM OTP)
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TM8795 Data Sheet (Ver 1.2) (.pdf)
AP Note: TM8795 electrical characteristics (*.pdf)
tenx 4-bit Summary (.pdf)
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Description:
The TM8795 is an One Time PROM embedded high-performance 4-bit microcomputer with LCD/LED driver. It contains all the functions in TM87-series for 3V/5V application.
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Feature:
1. Powerful instruction set.
- 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.
2. Memory capacity.
- Max. Program ROM capacity: 4096 x 16bits.
- Max. Index ROM capacity: 4096 x 8 bits.
- Max. Data RAM capacity: 1024 x 4 bits.
3. Input / output ports.
- Port IOA: 4 pins (with internal pull-low, chattering prevention clock).
- Port IOB: 4 pins (with internal pull-low).
- Port IOC: 4 pins (with internal pull-low, low-level-hold, chattering prevention clock).
- Port IOD: 4 pins (with internal pull-low, chattering prevention clock).
4. 8 level subroutine nesting.
5. Interrupt function.
- External factor: 5 (INT pin, Port IOA, C, D & HK input).
- Internal factor: 4 (Pre-Divider, Timer 1, Timer 2 & RFC).
6. Built-in EL-light driver.
- ELC, ELP (Mux with IOB1 IOB2).
7. Built in Alarm, Frequency or Melody generator.
8. BZB, BZ (Mux with IOB3 IOB4).
9. Built-in R to F Converter circuit.
- CX, RR, RT. RH (Mux with IOA1~IOA4).
10. Built in KEY_BOARD scanning function.
- K1~K16 (Share with SEG1~SEG16).
- KI1~KI4 (Mux with IOC1~IOC4).
11. Two 6-bit programmable timer with programmable clock source.
12. Watch dog timer.
13. LCD driver output.
- 41 LCD/LED driver outputs (up to 369 LCD segment drivable).
- 1/2 Duty~1/9 Duty for both LCD selected by option.
- 1/2 Bias~1/4 Bias for LCD selected by option.
- Single instruction to turn off all segments.
- Option is used to select COM5~9, SEG1~41 as DC output / P_open drain.
14. Built-in Voltage doubler, halver charge pump circuit.
15. Dual clock operation, and slow oscillation can set X'tal or external R&C by switch option, and fast oscillation can set 3.58MHz ceramic resonator or external R by switch option.
16. HALT function.
17. STOP function.
18. ROM code protect fuse.
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Applications:
- Timer / Calendar / Calculator / Thermometer
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