Sanyo VPC-S60 Service Manual page 10

42 RXD6
43
TXD6
NOT USED
44
45
NOT USED
46
NOT USED
47
AVREF
48 AVSS
49
BATTERY
50 VMONIT
51 ILLUMI
52 TOUCH_IN
53 CARD
54
AV JACK
55
NOT USED
56
NOT USED
57
ST_CHG_ON
58 SCK
59
SI
60
SO
61
BACKUPCTRL
62 FLMD0_SY
63
PW_TEST
64
NC
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 and ASIC.
8-bit micro processor
setting of
external port
communi-
cation
I Program writing reception data (UART)
O Program writing reception data (UART)
- -
- -
-
-
I Internal A/D standard potential
- Analog GND (A/D GND)
I Battery potential detection (A/D)
I Strobo condensor charge potential detection (A/D)
I Illuminance sensor potential detection (A/D)
I Touch sensor input (A/D)
I SD card insertion detection
I AV cable insertion detection (L= detection)
I Always input mode
O Always low output
O Strobo condensor charge start
O Communication CLK to ASIC
I Reception data from ASIC
O Sending data to ASIC
O Charge control to coin battery (L= charge)
O -
I Power compulsion ON at Low (test)
I Always input mode
Table 5-1. 8-bit Microprocessor Port Specification
MRST
PLLEN
SI
SO
SCK
SREQ
COMREQ
Fig. 5-1 Internal Bus Communication System
– 10 –
ASIC