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80C52 is a high-performance CMOS ROM, OTP, EPROM, and ROMless version of the 80C51 CMOS single-chip 8-bit microcontroller. The 80C52 retains all features of the TEMIC 80C51 with extended ROM/EPROM capacity (8Kbytes), 256 bytes of internal RAM, a 6-source, 4-level interrupt system, and on-chip oscillator, and three timer/ counters. In addition, the 80C52 has a dual data pointer, a more versatile serial channel that facilitates multiprocessor communication (EUART), and an X2 speed improvement mechanism.
P80C52 Pinout
P80C52 Pin Configuration
| Pin Number | Pin Name | Description |
|---|---|---|
| 1-8 | P1.0-P1.7 | Port 1 |
| 9 | RST | Reset |
| 10 | P3.0/RXD | Port 3.0 / Serial Receive Pin |
| 11 | P3.1/TXD | Port 3.1 / Serial Transmit Pin |
| 12 | P3.2/INT0 | Port 3.2 / Interrupt 0 (Active Low) |
| 13 | P3.3/INT1 | Port 3.3 / Interrupt 1 (Active Low) |
| 14 | P3.4/T0 | Port 3.4 / Timer 0 |
| 15 | P3.5/T1 | Port 3.5 / Timer 1 |
| 16 | P3.6/WR | Port 3.6 / Write (Active Low) |
| 17 | P3.7/RD | Port 3.7 / Read (Active Low) |
| 18 | XTAL2 | Crystal Input |
| 19 | XTAL1 | Crystal Input |
| 20 | Vss | Ground |
| 21-28 | P2.0-P2.7 | Port 2 |
| 29 | PSEN | Program Store Enable (Active Low) |
| 30 | ALE | Address Latch Enable |
| 31 | EA | External Memory Enable (Active Low) |
| 32-39 | P0.7-P0.1 | Port 0 |
| 40 | Vcc | Positive Supply |
P80C52 Key Features
- 80C52 Compatible
- 8051 pin and instruction compatible
- Four 8-bit I/O ports
- Three 16-bit timer/counters
- 256 bytes scratchpad RAM
- Dual Data Pointer
- On-chip ROM/EPROM (8K-bytes)
- Programmable Clock Out and Up/Down Timer/ Counter 2
- Asynchronous port reset
You can download this datasheet for P80C52 CPU with 256×8 RAM 8kBytes ROM and I/O – Datasheet from the link given below:
