The 8051 Microcontroller and Embedded

Department of Computer Scien

ce and Information Engineering

National Cheng Kung University, TAIWAN

HANEL

PROGRAMMING THE 8255Connecting 8031/51 to

(^8255) (cont’)
8051 Connection to the 8255
74LS373
AD7 AD0
A1 A0 D7 D0
G D Q
OC
RD WRA15A14A13A12
P3.7P3.6 P2.7 P2.0ALE P0.7 P0.0
CS^8255 A1A0 D7D0
WRRD PA PB PC RES