Syntek Semiconductor Co.
, Ltd.
Specification 1.
FEATURES : STK55C324 * Operating voltage : 2.
5V – 5.
5 V.
* Maximum CPU operating frequency : 2MHz at 2.
7V * Dual oscillators : - RC or 32.
768 KHz crystal oscillator for LCD display and watch timer.
- RC oscillator for system clock.
* 40 segments and 8 commons output for LCD driver.
- 1/4 bias, 1/8 duty and 64Hz frame frequency.
- 16 levels contrast control.
* I/O port.
- 8 I/O pins with selectable wake up interrupt.
- Two output pins.
These two pins can be set as sound channel DAC outputs.
* Built in 160 bytes data RAM and 40 bytes display RAM.
* Built in 32K bytes ROM for program.
* One 8-bit timer with 8 predefined input clock.
* Two sound ...

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