W921C880
Description
The W921E880A/W921C880 are 4-bit micro-processor fabricated by CMOS process.
Key Features
- ROM (Super EPROM): 8K × 10 bits
- RAM: 1536 × 4 bits
- Crystal or RC for the main system clock: RC up to 4 MHz Crystal for 400 K, 800 K, 2 M, 3.58 M, 4 MHz
- Crystal for subsystem clock: 32.768 KHz I/O Pins
- 32 bidirectional and individually controllable I/O lines
- 32 bidirectional I/O lines
- 3- Revision A3 W921E880A/W921C880
- Four External sources: INT0 ( P4.3 ) P4 Port ( P4.0-P4.2 )
- Timer 0: 2-19 order divider (double source) Auto-reload timer Watch-dog timer
- Timer 1: 2-19 order divider Auto-reload timer Arbitrary waveform generator External event counter
