Sanyo VPC-CG11EXG, Service Manual

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Fig. 5-1 Internal Bus Communication System
2. Internal Communication Bus
The SYA block carries out overall control of camera operation by detecting the input from the keyboard and the condition of the
camera circuits. The 8-bit microprocessor reads the signals from each sensor element as input data and outputs this data to the
camera circuits (ASIC) or to the LCD display device as operation mode setting data. Fig. 5-1 shows the internal communication
between the 8-bit microprocessor, ASIC and SPARC lite circuits.
Table 5-1. 8-bit Microprocessor Port Specification
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ZAVJACK AV JACK connection detection (AD conversion)
VSS1
UNREGSY Camera power voltage input
CF2 Open
VDD1
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KEY_2ND Key input 2nd SHUTTER (L= input)
ZUSBDET
USB detection (L= detection)
RESET Microcomputer reset (L= reset)
XCIN Sub-clock oscillation terminal (32.768kHz)
XCOUT Sub-clock oscillation terminal (32.768kHz)
CF1 VDD connection built-in oscillation circuit : 4MHz
8-bit
Microprocessor
ASIC
SREQ
ASIC SO
ASIC SI
SCK
MRST
ZBAT_OFF
NOT USED
HOTLINE
BAT_TEMP
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Hot line request from ASIC
Battery temperature detection
Battery OFF detection (L= battery OFF)
Serial communication request signal ZSREQ
HINGE LCD panel rotation detection (L= panel inversion)
ZBOOT_COMREQ
TH_TEMP Camera temperature detection
ASIC_SDI Serial data output to ASIC
ASIC_SDO
Serial data input from ASIC
PLLEN
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PLLEN ASIC PLL ON/OFF control
BOOT output and COMREQ input