Sanyo VPC-CG6EX Service Manual page 10

SCAN OUT3
43
44 SCAN OUT2
SCAN OUT1
45
46 SCAN OUT0
47 ZHP_AD
48 BAT_I
49 BAT +
50
BAT_T
51
BL ON
52 BAT_OFF/INT0
SREQ
53
54
SCAN IN4
55
KEY_2nd
56 RESET
57 XCIN
58
XCOUT
59
VSS1
60
XIN
61
XOUT
62 VDD1
63
UNREG SY
64 AV JACK
65 TH_TEMP
66 SO
67 SI
68 NOT USED
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.
8-bit
Microprocessor
O Keyscan output 3
O Keyscan output 2
O Keyscan output 1
O Keyscan output 0
Headphone cable detection
I
Battery current value detection (analog input)
I
Battery voltage detection (analog input)
I
Battery temperature detection (analog input)
I
O LCD backlight ON/OFF signal (H=ON)
I Battery OFF detection (L= battery OFF)
I/O Serial communication request signal
I Keyscan input 4
I
Key input 2nd SHUTTER (L= input)
I Microprocessor reset input (L= reset)
I Sub clock (32.768 kHz)
O
Sub clock (32.768 kHz)
- GND
I Main clock (4 MHz)
O Main clock (4 MHz)
-
VDD
I Camera power voltage input
I
AV JACK connection terminal (L= connection)
I
Camera temperature detection
O
Serial data output
I
Serial data input
-
-
Table 5-1. 8-bit Microprocessor Port Specification
SREQ
ASIC SO
ASIC SI
SCK
MRST
PLLEN
TRST
Fig. 5-1 Internal Bus Communication System
– 10 –
ASIC