Sanyo VPC-E7 Service Manual page 10

42 PRG SI
43
PRG SO
NOT USED
44
45
NOT USED
46
NOT USED
47
AVREF
48 AVSS
49
BATTERY
50 ILLUMI
51 TOUCH_IN
52 NOT USED
53 CARD SW
54
CARD
55
AV JACK
56
ZCHG_DONE
57
NOT USED
58 SCK
59
SI
60
SO
61
ST_CHG ON
62 FLMD0_SY
63
DC IN
64
S1
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 sending data (UART)
- -
- -
-
-
I Internal A/D standard potential
- Analog GND (A/D GND)
I Battery potential detection (A/D)
I Illuminance sensor potential detection (A/D)
I Touch sensor input (A/D)
O -
O -
I SD card insertion detection
I AV cable insertion detection (L= detection)
I Strobo charge done detection (L= charge done)
O -
O Serial clock output
I Serial data input
O Serial data output
O Strobo condensor charge starting
O 8-bit microprocessor self programming port (H= microprocessor rewriting)
I DC jack detection
I Shutter S1 input
Table 5-1. 8-bit Microprocessor Port Specification
MRST
PLLEN
ASIC_SDO
ASIC_SDI
SCK
ZSREQ
ZBOOT_COMREQ
Fig. 5-1 Internal Bus Communication System
– 10 –
ASIC