65C23

, . .commodore ~ aanlcancIuct;ar group ©UYAJ@@ 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...