GENERAL DESCRIPTIONThe TM8762 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.
FEATURES1. Low power dissipation.
2. Powerful 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 or 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, Timer1, Timer2 & RFC).
8. Built-in EL panel 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 R to F Converter circuit.
. 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 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.
APPLICATIONTimer / Calendar / Calculator / Thermometer