8XL51FA Datasheet (Intel Corporation) - LOW VOLTAGE CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLERS

8XL51FA, LOW VOLTAGE CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLERS

VCC Supply voltage VSS Circuit ground Port 0 Port 0 is an 8-bit open drain bidirectional I O port As an output port each pin can sink several inputs Port 0 pins that have 1’s written to them float and in that state can be used as high-impedance inputs Port 0 is also the multiplexed low-order addres

8XL51FA FB FC LOW VOLTAGE CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLERS Commercial Express 87L51FA 83L51FA 80L51FA 87L51FB 83L51FB 87L51FC 83L51FC Y High Performance CHMOS OTP ROM ROM CPU Low Voltage Operation 20 MHz Commercial 16 MHz Express Operation Three 16-Bit Timer Counters Programmable Counter Array with High Speed Output Compare Capture Pulse Width Modulator Watchdog Timer Capabilities Up Down Timer Counter Three Level Program Lock System 8K 16K 32K On-Chip Program Memory 256 Bytes of On-Chi

8XL51FA Features

* of the MCS 51 microcontroller family as listed below Port Pin P3 0 P3 1 P3 2 P3 3 P3 4 P3 5 P3 6 P3 7 Alternate Function RXD (serial input port) TXD (serial output port) INT0 (external interrupt 0) INT1 (external interrupt 1) T0 (Timer 0 external input) T1 (Timer 1 external input) WR (external data