Table of Contents
Advertisement
46
TIME OUT
47
BAT CHG I
48
BAT_TMP
49
BAT_OFF/INT 0
SREQ
50
51
SCAN IN 6
52
NOT USED
53
RESET
54
XCIN
55
XCOUT
56
VSS1
57
XIN
58
XOUT
59
VDD1
60
BATTERY
61
VMONIT
62
TH_TEMP
63
SO
64
SI
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
Camera charging completed detection
I
Camera charging electric current detection
I
I
Battery temperature detection
Battery OFF detection signal input
I
I
Serial communication request signal
I
Key matrix input (interruption)
-
-
Microprocessor reset input
I
Clock oscillation terminal for clock (32.768 kHz)
I
Clock oscillation terminal for clock (32.768 kHz)
O
-
GND
Main clock oscillation terminal (4 MHz)
I
Main clock oscillation terminal (4 MHz)
O
-
VDD
Battery voltage detection
I
I
Main condenser charging voltage detection
I
Camera temperature detection
Serial data output
O
Serial data input
I
Table 5-1. 8-bit Microprocessor Port Specification
S. REQ
ASIC SO
ASIC SI
ASIC SCK
MRST
Fig. 5-1 Internal Bus Communication System
– 9 –
ASIC
Advertisement
Table of Contents
