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48 BOOT I/O Compulsion boot control L : DC JACK detection49 AV JACK I AV jack connection detection H : AV jack detection50 OPEN I Lens barrier open detection switch input51/CARD I SD card insertion detection L : Insertion52 NOT USED - -53 LCD ON2 O LCD power ON/OFF control 254 /SCAN_IN 4 I Key scan input 455 /SCAN_IN 5 I Key scan input 556 /BACKUP_CNT O Backup battery charge control L : Charge ON57/USBI USB connector detectionL : USB detecion58 BR_OPEN O Lens barrier open control H : Open59BR CLOSE O Lens barrier close control H : Close60CLKSEL 0 O CPU clock ON/OFF control H : ON61CLKSEL 1 O CPU clock swtich control62PLLEN O PLL reset signal L : RESET63ZTESTO ASIC reset signalL : RESET64 /ASIC RESET O CPU reset singalL : RESETTable 5-1. 8-bit Microprocessor Port Specification2. 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, ASIC and SPARC lite circuits.ZTESTASIC RESETS. REQ8-bitMicroprocessorASIC SOASIC SIASIC SCKASICPLLENCLKSEL0CLKSEL1Fig. 5-1 Internal Bus Communication System3. Key OperaitonFor details of the key operation, refer to the instruction manual.SCANOUTSCANIN0 1 2 34560← LEFT↑ UP↓ DOWN→ RIGHTWIDETELETEST1MODEMENUFLASHSET1st SHUTTER 2nd SHUTTER2RECREC (VF)PC CAMPLAYOPTIONCOMPOWER OFFTable 5-2. Key Operation– 7 –