TM6820 Datasheet, PDF (1/9 Pages) List of Unclassifed Manufacturers – 4 Bit Microcontroller

tenx technology
TM6820
4 Bit Microcontroller
GENERAL DESCRIPTION
The TM6820 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, 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 (142 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
2048 x 16 bits.
128 x 4 bits.
4. LCD driver output.
5 common outputs and 35 segment outputs (up to drive 175 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 outputs(SEG1~35) 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 factor 2
Internal factor 4
(INT pin, Port IOC).
(Pre-Divider, Timer1, Timer2 & RFC).
8. Built-in EL panel driver.
ELC, ELP (Muxed with SEG28, SEG29).
tenx technology, inc.
V1.4 10/08/01