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