TM8706
tenx technology
GENERAL DESCRIPTION
The TM8706 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.
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
RAM capacity
4096
512
x 16 bits.
x 4 bits.
4 Bit Microcontroller
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, 1/6Duty, 1/7Duty, 1/8Duty or 1/9Duty 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 CMOS 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).
tenx technology, inc.
Rev 2.4
03/12/01
TM8706
Internal factors 4
(Pre-Divider, Timer1, Timer2 & 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.
APPLICATION
Timer / Calendar / Calculator / Thermometer
BLOCK DIAGRAM
2
tenx technology, inc.
Rev 2.4
03/12/01
京公网安备 11010802033920号
EEWORLD
