Sony BVW-55 Maintenance Manual page 619

M62352GP (MITSUBISHI)
M62352GP-75ED
C-MOS 8-BIT x 12-CHANNEL D/A CONVERTER
(WITH BUFFER OPERATIONAL AMPLIFIER)
—TOP VIEW—
1 V GND 20
SS
17
DI
AO3 2 19 AO2
AO4 3 18 AO1
AO5 4 17 DI
AO6 5 16 CK
AO7 6 15 LD
AO8 7 14 DO
16
AO9 8 13 AO12
AO10 9 12 AO11
10 V V 11
DD CC
AO1 - AO12 : 8-BIT D/A OUTPUTS
CK : CLOCK INPUT
DI : SERIAL DATA INPUT
DO : DATA OUTPUT
17
DI
16 12-BIT SHIFT REGISTER
CK
ADDRESS
15
LD
DECODER
8
CH1
8 8-BIT
LATCH
12
CH2
CH3
CH4
CH5
CH6
CH7
CH8
CH9
CH10
CH11
CH12
BVW-55
15
LD
18
AO1
19
AO2
2
AO3
3
AO4
4
AO5
5
AO6
6
AO7
7
AO8
8
AO9
9
AO10
11
AO11
12
AO12
14
DO
14
DO
8-BIT
+
18
AO1
D/A CONVERTER
–
19
AO2
2
AO3
3
AO4
4
AO5
5
AO6
6
AO7
7
AO8
8
AO9
9
AO10
12
AO11
13
AO12
MB3761PF-ER (FUJITSU)
VOLTAGE DETECTOR
—TOP VIEW—
1 + V 8
CC
_
2 7
3 + 6
_
4 GND 5
1.2 V
MB3793-42PNF (FUJITSU)
MB3793-42PNF-ER
SOURCE VOLTAGE SUPERVISOR
—TOP VIEW—
RESET
1 8 CK1
OUT IN
CTW 2 7 CK2
IN IN
CTP 3 6 INH
IN IN
4 GND 5
V
CC
INPUT
CK1 : CLOCK 1
CK2 : CLOCK 2
CTP : POWER ON RESET HOLD TIME PRESET
CTW : WATCHDOG TIMER SUPERVISION TIME PRESET
INH : INHIBIT
OUTPUT
RESET
: RESET
3
CTP
6
INH
PULSE
GENERATOR1
8
CK1
WATCHDOG
TIMER
7
CK2
PULSE
GENERATOR2
V
CC
2
CTW
R1
COMPARATOR
_
R1
+
V = 1.24 V
REF
8
CK1
7
CK2
2 1
CTW RESET
3
CTP
6
INH
V V
CC CC
I = 30 uA I = 3 uA
2 1
S Q
COMPARATOR
RSFF2
+
1
RESET
Q
R
_
OUTPUT
BUFFER
S Q
RSFF1
Q
R
REFERENCE
VOLTAGE
CIRCUIT
2-69
IC