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Atmel
AT89S8252 40-Pin 24MHz 8kB 8-bit Microcontroller
Photograph
Features
- Compatible with MCS-51 Products
- 8K Bytes of In-System Reprogrammable Downloadable Flash Memory
- 2K Bytes of EEPROM
- 4V to 6V Operating Range
- Fully Static Operation: 0Hz to 24MHz
- Three-level Program Memory Lock
- 256 x 8-bit Internal RAM
- 32 Programmable I/O Lines
- Three 16-bit Timer/Counters
- Nine Interrupt Sources
- Programmable UART Serial Channel
- Low-power Idle and Power-down Mode
- Hardware Watchdog Timer
- Dual Data Pointer
- Power-off Flag
- 40-pin PDIP
Pin Layout
Pin Description
| Pin Number | Description |
|---|---|
| 1 - 8 | P1.0-P1.7 - Port 1 |
| 9 | RESET - Reset (Active Low) |
| 10 - 17 | P3.0-P3.7 - Port 3 |
| 18 | XTAL2 - Crystal |
| 19 | XTAL1 - Crystal |
| 20 | GND - Ground |
| 21 - 28 | P2.0-P2.7 - Port 2 |
| 29 | PSEN - Program Store Enable |
| 30 | ALE - Address Latch Enable |
| 31 | EA - External Access Enable |
| 32 - 39 | P0.7-P0.1 - Port 0 |
| 40 | Vcc - Positive Power Supply |
Dimensional Drawing
Technical Data
