Bit Value Discrimination; Switch Check (1) - Sony DSR-250 Service Manual

3. Bit value discrimination

Bit values must be discriminated using the display data of the
adjustment remote commander for following items. Use the table
below to discriminate if the bit value is "1" or "0".
Display on the adjustment remote commander
Page
Display on the
adjustment bit3
remote or
commander bit7
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 1
A
9 1
A 1
A ( )
B ( b ) 1
C ( c ) 1
d
D ( ) 1
E ( E ) 1
B
F
F ( ) 1
Example: If "8E" is displayed on the adjustment remote commander, the
bit values for bit7 to bit4 are shown in the A column, and the
bit values for bit3 to bit0 are shown in the B column.

4. Switch check (1)

Page 2 Address 43
Bit Function
0 VTR MODE SW (PM-040 board S081)
1 CAMERA MODE SW (PM-040 board S081)
2 START/STOP SW
(FS-082 board S402, CF-1044 block S432)
3 EJECT SW (EJ-034 board S291)
4 CC DOWN SW (Mechanism chassis)
5 PHOTO FREEZE SW (CF-1044 block S431)
6 MEMORY MODE SW (PM-040 board S081)
7
Using method:
1) Select page: 2, address: 43.
2) By discriminating the bit value of display data, the state of the switch can be discriminated.
Address
bit3 to bit0 discrimination
bit7 to bit4 discrimination
Bit values
bit2 bit1 bit0
or or or
bit6 bit5 bit4
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
When bit value=1
OFF
OFF
OFF
OFF
OFF (UP)
OFF
OFF
When bit value=0
ON
ON
ON
ON
ON (DOWN)
ON
ON
5-80