— 44 —CONTROL PORT FUNCTIONS (CONT.)System Control (CPU : IC800 CONT.)Pin Name Function I/O Description52 P73/INT3/T0IN Rcin IN RC Input53 RES RESET in IN Microcomputer Reset RESET:Low Normal:High54 XT1/AN10 Xin IN Conect to VDD155 XT2/AN11 Reserve OUT (OPEN)56 VSS1 Vss IN GND(0Vdc)57 CF1 Xti IN Main Clock IN (Fosc=8MHz)58 CF2 Xto OUT Main Clock OUT (Fosc=8MHz)59 VDD1 Power IN IN 5V(5Vdc±10%)60 AN0 Key in IN Key input61 AN1 AFT(Reserve) IN GND62 P82 PANEL READY IN Panel Ready (for PDP) OK:High NG:Low63 P10/SO0 VS-ON OUT VS-ON(for PDP) ON:High OFF:Low64 P11/SI0/SB0 REG SW1 OUT REG SW1 (ON:High OFF:Low)