Sanyo Xacti VPC-C40, Руководство по обслуживанию

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Fig. 5-1 Internal Bus Communication System
2. Internal Communication Bus
The SY1 circuit 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.
8-bit
Microprocessor
ASIC
S. REQ
ASIC SO
ASIC SI
ASIC SCK
MRST
Table 5-1. 8-bit Microprocessor Port Specification
54
I
Serial communication request signal 50
SREQ
XCIN
I
Clock oscillation terminal for clock (32.768 kHz)
52
53
NOT USED
-
-
RESET I
Microprocessor reset input
46
TIME OUT I
Camera charging completed detection
47
BAT CHG I I
Camera charging electric current detection
48 BAT_TMP I Battery temperature detection
51 SCAN IN 6
I Key matrix input (interruption)
49 BAT_OFF/INT 0 I Battery OFF detection signal input
55
XCOUT O
Clock oscillation terminal for clock (32.768 kHz)
56
VSS1 - GND
57 XIN I
Main clock oscillation terminal (4 MHz)
58 XOUT
O
Main clock oscillation terminal (4 MHz)
59 VDD1 - VDD
60
BATTERY
I
Battery voltage detection
61 VMONIT
I
Main condenser charging voltage detection
62 TH_TEMP I Camera temperature detection
63
SO O
Serial data output
64
SI I
Serial data input