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AT89S8252-24AC 44-pin 8kB 80 Series Microcontroller Technical Data
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
- 44-pin PLCC
Pin Layout
Pin Description
| Pin Number | Description |
|---|---|
| 1 - 3 | P1.5-P1.7 - Port 1 |
| 4 | RESET - Reset (Active Low) |
| 5 | P3.0 - Port 3 |
| 6 | NC - Not Connected |
| 7 - 13 | P3.1 - P3.7 - Port 3 |
| 14 | XTAL2 - Crystal |
| 15 | XTAL1 - Crystal |
| 16 | GND - Ground |
| 17 | GND - Ground |
| 18 - 25 | P2.0 - P2.7 - Port 2 |
| 26 | PSEN - Program Store Enable |
| 27 | ALE - Address Latch Enable |
| 28 | NC - Not Connected |
| 29 | EA - External Access Enable |
| 30 - 37 | P0.7 - P0.1 - Port 0 |
| 38 | Vcc - Positive Power Supply |
| 39 | NC - Not Connected |
| 40 - 44 | P1.0 - P1.4 - Port 1 |
Dimensional Drawing
Technical Data
