Sanyo VPC-J4 Service Manual

Contents

– 7 –Fig. 5-1 Internal Bus Communication SystemTable 5-2. Key Operation2. 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.3. Key OperaitonFor details of the key operation, refer to the instruction manual.Table 5-1. 8-bit Microprocessor Port Specification120 1 2 3SCANOUTSCANIN← LEFTREC (MOV)TELEPLAY→ RIGHTWIDE↓ DOWNREC (CAM)4SET1st SHUTTER↑ UPMENUMODE5TEST2nd SHUTTER08-bitMicroprocessor ASICS. REQASIC SOASIC SIASIC SCKASIC RESETPLLENCLKSEL0ZTEST48IASIC control signal (ZTEST)50 ASIC TEST O61 NC6364AVREF ON O AD VREF ON/OFF signal (L= ON)NC IBATTERY I Battery voltage detection (analog)46 NC O (Output mode “0” fixing)47 CARD I Card detection (L= card)51~56 SCAN IN5~0 O Key scan input 5~057 NC I58 DC_IN I DC adaptor connection detecion (L= DC adaptor)59 AV_JACK I AV JACK connection detection (H= AV JACK detection)62 INT_TEMP I Internal temperature detection (analog)60 CHG_DONE I Storobe charge detection (input port) (L= ON)45 BOOT_COMREQ O Boot/command request49 PLLEN O ASIC PLL oscillation ON/OFF