This is a PDF file about LD87C51FA-1 supplier search
This document describes the Intel 8XC51FA/8XC51FB/8XC51FC family of high-performance CHMOS single-chip 8-bit microcontrollers. These devices are fabricated on Intel's reliable CHMOS III-E technology and are pin-for-pin compatible with existing MCS-51 controller products.
The datasheet details the architecture, including three 16-bit timers/counters, a programmable counter array with pulse width modulation capabilities, and up to 32 programmable I/O lines. It also covers memory organization, package types (DIP, CERDIP, PLCC, QFP), pin descriptions for Ports 0 through 3, and oscillator characteristics.
| Operating Frequency | 12/24/33 MHz |
|---|---|
| Timers/Counters | Three 16-Bit Timer/Counters |
| I/O Lines | 32 Programmable I/O Lines |
| Interrupt Sources | 7 Interrupt Sources |
| External Program Memory Space | 64K |
| On-Chip Program Memory | 8K/16K/32K |
| On-Chip Data RAM | 256 Bytes |
The devices support operation at frequencies of 12, 24, or 33 MHz.
These devices can address up to 64 Kbytes of external program/data memory.
A high signal on this pin for two machine cycles while the oscillator is running resets the device.