80C451/83C451/87C451 80C51 8-bit Microcontroller Family 4K/128 OTP/ROM/ROMless, Expanded I/O

The Philips 8XC451 is an I/O expanded single-chip Microcontroller fabricated with Philips high-density CMOS technology. Philips epitaxial substrate minimizes latch-up sensitivity. The 8XC451 (includes the 80C451 87C451 and 83C451 is a functional extension of the 87C51 Microcontroller with three additional I/O ports and four I/O control lines for a total of 68 pins. Four control lines associated with port 6 facilitate high-speed asynchronous I/O functions. The 8XC451 includes a 4k 8 ROM 83C451 EPROM 87C451 , a 128 8 RAM, 56 I/O, two 16-bit Timer Counters a five source, two priority level, nested interrupt structure, a serial I/O port for either a full duplex UART I/O expansion, or multi-processor Communications and on-chip Oscillator and Clock circuits. The 80C451 ROMless version includes all of the 83C451 features except the on-board 4k 8 ROM. The 87C451 has 4k of EPROM on-chip as program memory and is otherwise identical to the 83C451. The 8XC451 has two software selectable modes of reduced activity for further power reduction; idle mode and power-down mode. Idle mode freezes the CPU while allowing the RAM, Timers serial port, and interrupt system to continue functioning. Power-down mode freezes the Oscillator causing all other chip functions to be inoperative while maintaining the RAM contents.
By NXP Semiconductors
80C451 's Packages80C451 's pdf datasheet
83C451
87C451




80C451 Pinout, Pinouts
80C451 pinout,Pin out
This is one package pinout of 80C451,If you need more pinouts please download 80C451's pdf datasheet.

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