89C55 Atmel Microcontroller IC
- Core Processor: 8051
- Data Bus Width: 8 bit
- Maximum Clock Frequency: 33 MHz
- Program Memory Size: 20 KB
- Program Memory Type: Flash
- RAM Size: 256 B
- ADC: No
- Number of Programmable I/Os: 32
- Number of Timers: 3x16 bit
- Supply Voltage Range: 4 V to 5.5 V
- Package: PDIP-40
- Compatible with MCS-51™ Products
- 20K Bytes of In-System Reprogrammable Flash Memory – Endurance: 1,000 Write/Erase Cycles
- Fully Static Operation: 0 Hz to 33 MHz
- Three-Level Program Memory Lock
- 256 x 8-bit Internal RAM
- 32 Programmable I/O Lines
- Three 16-bit Timer/Counters
- Eight Interrupt Sources
- Low Power Idle and Power Down Modes