Sanyo VPC-E6 Service Manual page 8

43 NOT USED
44
LCD BL
45 TH TEMP
46
TIME OUT
47
NOT USED
48 BAT_TEMP
49 BAT_OFF
50 SREQ
51
SCAN IN 4
52 BR PI E
53 RESET
54
XCIN
55
XCOUT
56
VSS1
57 XIN
58
XOUT
59
VDD1
60
BATTERY
61
VMONIT
62 TSEN_SENSE
63
SO
64
SI
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) as operation mode setting data. Fig. 5-1 shows the internal communication between the 8-bit micropro-
cessor, ASIC and SPARC lite circuits.
8-bit
Microprocessor
-
O
O
LCD backlight ON/OFF signal
I Internal temperature detection
Camera charging completed detection
I
-
O
I Battery temperature detection
I Battery OFF detection signal input
I Serial communication request signal
I Key matrix input (interruption)
I Barrier motor PI input (interruption)
I Microprocessor reset input
I Clock oscillation terminal for clock (32.768 kHz)
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
Main condenser charging voltage detection
I
I Touch sensor detection
Serial data output
O
I Serial data input
Table 5-1. 8-bit Microprocessor Port Specification
MAIN RESET
S. REQ
ASIC SO
ASIC SI
ASIC SCK
PLLEN
Fig. 5-1 Internal Bus Communication System
– 8 –
ASIC