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PDF STK55C641 Data sheet ( Hoja de datos )
| Número de pieza | STK55C641 | |
| Descripción | STK55C641 | |
| Fabricantes | Syntek Semiconductor | |
| Logotipo |  |
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Syntek Semiconductor Co., Ltd
STK55C641 Specification
STK55C641
1. FEATURES :
* Operating voltage : 2.5V - 6V.
* Maximum CPU operating frequency : 4MHz at 5V and 1.5MHz at 2.5V
* Dual oscillators :
- 32.768 KHz crystal oscillator for LCD display and watch timer.
- RC oscillator for system clock.
* 40 segments and 16 commons output for LCD driver.
- 1/5 bias, 1/16 duty and 64Hz frame frequency.
- 1/4 bias, 1/8 duty and 128Hz frame frequency.
* I/O port.
- 30 I/O pins.
- Port 1 with selectable interrupt.
* Built in 2K bytes RAM (including LCD storage area).
* Built in 8K bytes ROM for program.
* One 8-bit timer with 8 predefined input clock.
* Five interrupt sources :
NMI - 64 Hz interrupt
IRQ1 - Stopwatch timer interrupt
IRQ2 - Fix-time timer interrupt
www.DataSheet4U.com IRQ3 - Timer interrupt
IRQ4 - External interrupt
* Code option :
- Built-in 150K OHM pull-up resistors for I/O port.
- 1/8 duty or 1/16 duty.
2. APPLICATION :
* Data bank
* Calculator
* Hand-held game
* Small instrument
* Toy
LCD Controller
1 / 1 ISSUE DATE : 3 March, 2000
1 page  
Syntek Semiconductor Co., Ltd
STK55C641
In sleep mode 1, both of the main system oscillator and 32.768KHz sub-system
oscillator will be stopped. So, all function are stopped and only external interrupt can
wake up this chip. The LCD display will be turn off while getting into sleep mode 1.
In sleep mode 2, only main system oscillator will be stopped. So, the following
functions will still keep working.
* The LCD will be kept on.
* The watch timer and fix-time timer will keep going.
* The NMI, port 1, watch timer and fix-time timer interrupt will wake up this chip.
* CPU will keep working if clock source is 32.768K Hz.
1002 Watch timer control register. Write only.
Bit 0 : = 0 Set watch timer interrupt at 10 Hz
= 1 Set watch timer interrupt at 100 Hz
1 : = 0 Set fix-time timer interrupt at 2 Hz
= 1 Set fix-time timer interrupt at 1 Hz
2 : = 0 Normal operation.
= 1 Reset and stop stopwatch timer.
3 : = 0 Stop stopwatch register without reset.
= 1 Start stopwatch timer.
4 : = 0 CPU clock is system clock.
= 1 CPU clock is 32.768K Hz.
7-5 : Reserved.
www.DataSheet4U.com The default value for each bit is zero. Bit 2 will be cleared to zero automatically after
stopwatch timer reset.
1003 IRQ flag register. Read & write.
Read function :
Bit 0 : = 1 Stopwatch timer interrupt, IRQ1.
1 : = 1 Fix-time timer interrupt, IRQ2.
2 : = 1 Timer interrupt, IRQ3.
3 : = 1 External interrupt, IRQ4.
Write function :
Bit 0 : = 0 Clear stopwatch timer interrupt.
1 : = 0 Clear fix-time timer interrupt.
2 : = 0 Clear timer interrupt.
3 : = 0 Clear external interrupt.
Note : Please do not use the STZ $1003 to clear all the interrupts at the same time.
LCD Controller
5 / 5 ISSUE DATE : 3 March, 2000
5 Page 
Syntek Semiconductor Co., Ltd
8. LCD WAVEFORM :
8.1 1/16 duty
1/64 sec
STK55C641
COM1
COM2
COM3
www.DataSheet4U.com
COM16
SEGx
Vlcd
4/5 Vlcd
3/5 Vlcd
2/5 Vlcd
1/5 Vlcd
Vss
Vlcd
4/5 Vlcd
3/5 Vlcd
2/5 Vlcd
1/5 Vlcd
Vss
Vlcd
4/5 Vlcd
3/5 Vlcd
2/5 Vlcd
1/5 Vlcd
Vss
•
•
•
Vlcd
4/5 Vlcd
3/5 Vlcd
2/5 Vlcd
1/5 Vlcd
Vss
Vlcd
4/5 Vlcd
3/5 Vlcd
2/5 Vlcd
1/5 Vlcd
Vss
There are two LCD matrix DOTs active at (SEGx,COM2) and (SEGx,COM16)
LCD Controller
11 / 11
ISSUE DATE : 3 March, 2000
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet STK55C641.PDF ] | |
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