Sony BVP-550, Maintenance Manual

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6-26
IC
BVP-550
TLC0820ACDW(TI)FLAT PACKAGE
TLC272CP
TLC272CPW(TI)
TLC27L2CPS(TI)FLAT PACKAGE
UPD4702G(NEC)
C-MOS 8-BIT SEMIFLASH TYPE A / D CONVERTER
—TOP VIEW—
V
DD
(+5V)
NC
IN
OUT
OUT
OUT
OUT
IN/OUT
IN
1
2
3
4
5
6
7
ANLG
D0
(LSB)
D1
D2
D3
WR/RDY
MODE
IN RD
8
14
15
16
17
18
19
20
13
GND
OUT
12
11
1
2
3
4
REF +
REF –
ANLG
7
MODE
13
CS
8
RD
6
WR/RDY
(LSB)D0
D1
D2
D3
D4
D5
D6
(MSB)D7
OFLW
OFLW
INT
OUT D7
(MSB)
INPUT
ANLG
CS
MODE
RD
REF+, REF–
OUTPUT
D0-D7
INT
OFLW
INPUT/OUTPUT
WR/RDY
ANALOG SIGNAL
CHIP SELECT
MODE
READ
REFERENCE V, –
DIGITAL SIGNAL
INTERRUPT
OVERFLOW
L : WRITE/H : READY
;
;
;
;
;
;
;
;
;
OUT D6
OUT
D5
OUT D4
IN
IN
IN
CS
REF +
REF –
OUT
INT
9 12
10 11
5
14
15
16
17
18
9
4-BIT FLASH
A/D CONVERTER
(HIGHER)
4
OUTPUT
LATCH
AND
3-STATE
BUFFER
TIMING
&
CONTROL
4-BIT FLASH
A/D CONVERTER
(LOWER)
–1
+1
REF +
REF –
ANLG
12
11
1
7
13
8
6
9
MODE
CS
RD
WR/RDY
INT
18
OFLW
4-BIT
D/A CONVERTER
17
D7(MSB)
16
D6
15
D5
14
D4
5
D3
4
D2
3
D1
2
D0(LSB)
4
4
4
OPERATIONAL AMPLIFIER
—TOP VIEW—
GND
V
DD
(+3V to +16V)
1
2
3
4 11
12
13
14
+
+
–
–
C-MOS INCREMENTAL ENCODER 8-BIT UP DOWN COUNTER
—TOP VIEW—
V
DD
(+5V
)
1
2
3
4
5
6
7
RESET
A
B
CD0
CD1
CD2
CD3 CD5
CD4
A
OE
CD6
CD7
OE
STB
BORROW
CARRY
8
14
15
16
17
18
19
20
13
A
B
BORROW
CARRY
CD0-7
OE
RESET
STB INCREMENTAL SIGNAL (PHASE A) INPUT
INCREMENTAL SIGNAL (PHASE B) INPUT
BORROW PULSE OUTPUT
CARRY PULSE OUTPUT
COUNT DATA OUTPUT
OUTPUT CONTROL SIGNAL INPUT
COUNTER RESET INPUT
LATCH STROBE SIGNAL INPUT ;
;
;
;
;
;
;
;
NC
NC
NC
GND
16
2
B
3
RESET
1
18
5
6
7
8
12
13
14
15
CD0
CD1
CD2
CD3
CD4
CD5
CD6
CD7
BORROW
CARRY
9 12
10 11
STB
17 19
A
2
RESET
5-8
12-15
19
18
1
B
3
OE
16
CD0-CD7
CARRY
BORROW
STB
17
PHASE
DISCRIMINATION
EDGE DETECTOR
8-BIT
UP / DOWN COUNTER
8-BIT LATCH
TRI-STATE OUTPUT