TRI-PORT INTERFACE
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MPS
65C23
TRI-PORT INTERFACE
[___6_5C_2_3_T_R_I_·P_O_R_T_I_N_T_ER_F_A_C...
Description
, . .commodore
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MPS
65C23
TRI-PORT INTERFACE
[___6_5C_2_3_T_R_I_·P_O_R_T_I_N_T_ER_F_A_C_E____~
I CONCEPT .. The 65C23 TRI-PORT Interface (TPI) is designed to simplify the implementation of complex I/O operations in microcomputer systems. It has three dedicated 8-bit I/O ports which provide 24 individually programmable I/O lines.
FEATURES: 24 individually programmable 1/0 lines Completely static operation Two TIL Drive Capability 6 directly addressable registers 1 M Hz operation
65C23 Addressing
65C23 REGISTERS (Direct Addressing)
*000 001 010 011 100 101 110 1 11
RO PRA - Port Register A R1 PRB - Port Register B R2 PRC - Port Register C R3 DORA - Data Direction Register A R4 DDRB -- Data Direction Register B R5 DDRC - Data Direction Register C Illegal States Illegal States
*NOTE: RS2. RS1. RSO respectively
I
ORDER NUMBER: MXS 65C23
'------ PACKAGE DESIGNATOR C=CERAMIC P = PLASTIC
65C23 PIN CONFIGURATION
Vss PAO PA1 PA...
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