TM8726 Datasheet PDF - Tenx

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TM8726
Tenx

Part Number TM8726
Description 4-Bit Microcontroller
Page 10 Pages


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TM8726
4 Bit Microcontroller
GENERAL DESCRIPTION
The TM8726 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 (178 instructions).
zBinary addition, subtraction, BCD adjust, logical operation in direct and index
addressing mode.
zSingle-bit manipulation (set, reset, decision for branch).
zVarious conditional branch.
z16 working registers and manipulation.
zTable look-up.
zLCD driver data transfer.
3. Memory capacity.
zROM capacity
zRAM capacity
4096 x 16 bits.
512 x 4 bits.
4. LCD driver output.
z9 common outputs and 41 segment outputs (up to drive 369 LCD segments).
z1/2 Duty, 1/3 Duty, 1/4 Duty, 1/5 Duty, 1/6Duty, 1/7Duty, 1/8Duty or 1/9Duty is selected
by MASK option.
z1/2 Bias, 1/3 Bias or 1/4 Bias is selected by MASK option.
zSingle instruction to turn off all segments.
zCOM5~9,SEG1~41 could be defined as CMOS or P_open drain type output by mask
option.
5. Input/output ports.
zPort IOA
4 pins (with internal pull-low), muxed with SEG24~SEG27.
zPort IOB
4 pins (with internal pull-low). muxed with SEG28~SEG31
zPort 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.
zPort 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.
zExternal factors 4
zInternal factors 4
(INT pin, Port IOC, IOD & KI input).
(Pre-Divider, Timer1, Timer2 & RFC).
1 tenx technology, inc.
Rev.1.1 2004/04/20



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TM8726
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8. Built-in EL-light driver.
zELC, ELP (Muxed with SEG28, SEG29).
9. Built in Alarm, clock or single tone melody generator.
zBZB, BZ (Muxed with SEG30, SEG31).
10. Built-in resistance to frequency converter.
zCX, RR, RT, RH (Muxed with SEG24 ~ SEG27).
11. Built in key matrix scanning function.
zK1~K16 (Shared with SEG1~SEG16).
zKI1~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
zslow clock oscillation can be defined as X’tal or external RC type oscillator by mask
option.
zfast 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
2 tenx technology, inc.
Rev.1.1 2004/04/20



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BLOCK DIAGRAM
TM8726
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B1-4
ELC, ELP
BZB,BZ
A1-4
CX
RR,RT,RH
C1-4
KI1~4
D1-4
COM1-9 SEG1-41 VDD1-4
B-PORT
EL DRIVER
ALARM
A-PORT
RFC
C-PORT
KEY-IN
D-PORT
LCD DRIVER
SEGMENT PLA
4 BITS DATA BUS
FREQUENCY
GENERATOR
INDEX ROM
256(16-N) X 8 BITS
ALU
DATA RAM
512 X 4 BITS
PRE-
DIVIDER
6 BITS PRESET
TIMER 1 & 2
OSCILLATOR
CONTROL
CIRCUIT
CUP0,1,2 XTIN,OUT CFIN,OUT RESET INT
8 LEVELS
STACK
INSTRUCTION
DECODER
12 BITS PROGRAM
COUNTER
PROGRAM ROM
(2048+128N)
X 16 BITS
TM8726 BLOCK DIAGRAM N:0->16
3 tenx technology, inc.
Rev.1.1 2004/04/20



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PAD DIAGRAM
60
50
66
Die size : 1750um x 2580um
1
10
20
The substrate of chip should be connected to GND.
TM8726
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40
30
4 tenx technology, inc.
Rev.1.1 2004/04/20



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