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tenx MCU
> 4-bit MCU
> TM87 series
>MCU
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| TM8721 |
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4-Bit Microcontroller
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TM8721 Data Sheet (Ver 1.0) (*.pdf)
TM8721 User's Manual(English) Ver 1.0 (*.pdf)
tenx 4-bit Summary (*.pdf)
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Description:
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Feature:
1. Powerful instruction set (137 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.
- Look-up table.
- LCD driver data transfer.
2. Memory capacity
- ROM capacity 1024 x 16 bits.
- RAM capacity 64 x 4 bits.
3. Input/output ports
- Port IOA4 1 pin (with internal pull-low). IOA4 port had built in the input signal chattering prevention circuitry.
- Port IOC 4 pins (with internal pull-low, low-level-hold).
- Port IOB3,4 2 pins (with internal pull-low), & mask option with BZB, BZ.
4. 8 level subroutine nesting.
5. Interrupt function
- External factor 1 (Pin IOA4 port).
- Internal factors 3 (Pre-Divider, Timer2 & RFC).
6. Built in Alarm, clock or single tone melody generator (BZB, BZ), & mask option with IOB3, 4.
7. Built-in R to F Converter circuit
- CX, RR, RT.
8. One 6-bit programmable timer (Timer 2) with programmable clock source.
9. LCD driver output
- 9 LCD driver outputs. (Up to drive 36 LCD segments)
- 1/4 Duty and1/2 Bias for LCD display.
- Single instruction to turn off all segments.
- 9 DC/Open Drain outputs for LED mask option.
- 16 LCD Address.
10. Built-in Voltage double charge pump circuit.
11. Clock oscillation can be defined as X'tal, external-R or internal-R 2 type oscillator by mask option.
12. HALT function.
13. STOP function.
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Applications:
Thermometer / Timer
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