Datasheet Summary
Syntek Semiconductor Co., Ltd
STK55C641 Specification 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 mons 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
-...