– 9 –Table 5-2. Key Operation3. Key OperaitonFor details of the key operation, refer to the instruction manual.Table 5-1. 8-bit Microprocessor Port Specification120 1 2 3SCANOUTSCANIN-UPSETMENUPW_ON-LEFTS1DOWNRIGHT043 FLMDO O Microprocessor Port44 XOUT O Main clock oscillation terminal (not used)42 XCIN I Clock oscillation terminal for clock (32.768 kHz)Fig. 5-1 Internal Bus Communication System2. Internal Communication BusThe SYA block carries out overall control of camera operation by detecting the input from the keyboard and the condition of thecamera circuits. The 8-bit microprocessor reads the signals from each sensor element as input data and outputs this data to thecamera circuits (ASIC) or to the LCD display device as operation mode setting data. Fig. 5-1 shows the internal communicationbetween the 8-bit microprocessor and ASIC.8-bit micro processor ASICMRSTHOT LINEPLLENSISOSCKSREQcommuni-cationCOMREQsetting ofexternal port-45 XIN I Main clock oscillation terminal (not used)46 VREF - Standard voltage47 VSS - GND48 VDD I VDD3 - TELEWIDE PLAYS2