TM8704

Features:

1. 1.5V operation only and with low power dissipation.
2. Powerful instruction set (129 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 1152 x 16 bits.
RAM capacity 80 x 4 bits.
4. LCD driver output.
5 common outputs and 24 segment outputs (up to drive 120 LCD segments).
1/2 Duty, 1/3 Duty, 1/4 Duty or 1/5 Duty is selected by MASK option.
1/2 Bias or 1/3 Bias is selected by MASK option.
Single instruction to turn off all segments.
Segment output pins (SEG1~12) could be defined as CMOS or P_open drain output type by mask option.
5. Input/output ports.
Port IOA 4 pins, muxed with SEG24~SEG27.
Port IOB 4 pins(with internal pull-low), muxed with SEG2
Port IOC 4 pins(with internal pull-low), muxed with SEG3 IOC port had built in the input signal chattering
6. 8 level subroutine nesting.
7. Interrupt function.
External factor 2 (INT pin, Port IOC).
Internal factors 2 (Pre-Divider, Timer1).
8. Built-in Diode for Solar Cell power regulation.
9. Built in Alarm generator.

Application

Timer / Calendar / Calculator


Specifications

Name	Symbol	Range	Unit
Maximum Supply Voltage	VDD	-0.3 to 2.0	V
	VDD 1	-0.3 to 4.0	V
	VDD 2	-0.3 to 6.0	V
Maximum Input Voltage	Vin	-0.3 to VDD1/2+0.3	V
Maximum output Voltage	Vout1	-0.3 to VDD1/2+0.3	V
	Vout2	-0.3 to VDD3+0.3	V
Maximum Operating Temperature	Topg	-20 to +70
Maximum Storage Temperature	Tstg	-25 to +125

Description

The TM8704 is an embedded high-performance 4-bit microcomputer with LCD 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, LCD driver and look-up table in a signal chip.