Re: Interfacing in 8051
Hello!
•40-pin DIP package 8051 compatible CPU
•old chip with ceramic package and quartz window for UV, new generation will
see how the old chip look likes.
CPU: Any 8051 compatible with 40-pin DIP package @11.0592MHz
MEMORY: 27C256, 32kB EPROM for monitor program
62256, 32KB SRAM for both code and data space
I/O: direct cpu bus interface 2x16 line LCD
8-bit input port, 74LS244
8-bit output port, 74HC573
MEMORY and I/O Decoder: GAL16V8D
EEPROM: 24LC256, 32KB serial eeprom
RTC: Real-time clock, DS1307 with +3V Lithium backup
ADC: LTC1298, SPI interface 2-channel 12-bit Analog-to-Digital Converter
I/O pins: P1,P3 of 8051 cpu, 16-bit I/O port
Debug LED: single dot LED connected to P1.7
Keypad and DIPSW: 4-bit keypad and 4-bit DIP switch
RS232 Level Converter: MAX232
RS485: 75176 differential transceiver
Serial Interface: 9600 8n1
Monitor Program: Modified PAULMON2 including new commands