Описание
The P87C5 are high-performance static 80C51 designs incorporating Philips high-density CMOS technology with operation from 2.7 V to 5.5 V. They support both 6-clock and 12-clock operation. The P87C5 Series contain 128 byte RAM and 256 byte RAM respectively, 32 I/O lines, three 16-bit counter/timers, a six-source, four-priority level nested interrupt structure, a serial I/O port for either multi-processor communications, I/O expansion or full duplex UART, and on-chip oscillator and clock circuits.
- 80C51 Central Processing Unit
- 4 kbytes ROM/EPROM
- 128 byte RAM
- 12-clock operation with selectable 6-clock operation
- Memory addressing capability
- Up to 64 kbytes ROM and 64 kbytes RAM
- Power control modes:
- CMOS and TTL compatible
- Two speed ranges at VCC = 5 V
- 0 to 30 MHz with 6-clock operation
- 0 to 33 MHz with 12-clock operation
- Extended temperature ranges
- Dual Data Pointers
- Security bits: ROM (2 bits) and OTP (3 bits)
- Encryption array – 64 bytes
- Four interrupt priority levels
- Six interrupt sources
- Four 8-bit I/O ports
- Full-duplex enhanced UART
- Three 16-bit timers/counters T0, T1 (standard 80C51) and additional T2 (capture and compare)
- Programmable clock-out pin
- Asynchronous port reset
- Wake-up from Power Down by an external interrupt
- Low voltage (2.7 V to 5.5 V at 16 MHz) operation
