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