The P87C51SBPN is a 8-bit high-performance Static Design Microcontroller with Philips high-density CMOS technology with operation from 2.7 to 5.5V. The 8xC51 contain a 128bytes RAM and 256bytes 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, on-chip oscillator and clock circuits. In addition, the device is a low power static design which offers a wide range of operating frequencies down to zero. Two software selectable modes of power reduction-idle mode and power-down mode are available. The idle mode freezes the CPU while allowing the RAM, timers, serial port and interrupt system to continue functioning. The power-down mode saves the RAM contents but freezes the oscillator, causing all other chip functions to be inoperative.
- Clock can be stopped and resumed
- Power-down mode and idle mode
- CMOS and TTL compatible
- Extended temperature range
- Dual data pointers
- 4-level Priority interrupt
- 6 Interrupt sources
- Full-duplex enhanced UART
- Programmable clock out
- Asynchronous port reset
- Low EMI (inhibit ALE and slew rate controlled outputs)
- Wake-up from power down by an external interrupt
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