Sony CA-755 Maintenance Manual page 86

IC
NM27C512V150 (NS)
C-MOS 512K (65,536×8)-BIT UV EPROM
-TOP VIEW-
4 3 2 1
A6 5
IN
A5 6
IN
A4 7
IN
A3
8
IN
A2 9
IN
A1 10
IN
A0 11
IN
12 NC
DQ0 13
I/O
14 15 16 17
An CE OE /V V Dn
PP DD
+ 5V
A 0 0 D
IN OUT
+ 5V
A 0 1 HI-Z
IN
1 + 5V HI-Z
X
X
A 0 + 12.5V + 6V D
IN IN
A 0 0 + 6V D
IN OUT
+ 12.5V + 6V
1 HI-Z
X
22
OUTPUT ENABLE
OE/Vp-p
CHIP ENABLE
&
20
CE PROGRAM LOGIC
11
A 0
10
A 1
9
A 2 Y
8
DECODER
A 3
7
A 4
6
A 5
5
A 6
4
A 7
29
A 8
28
A 9
24
A10 X
27
DECODER
A11
3
A12
30
A13
31
A14
2
A15
4-14
32 31 30
11
A0
10
A1
29 A8
IN
9
A2
8
A3
28 A9
IN
7
A4
6
A5
27 A11
IN
5
A6
4
A7
NC
26
29
A8
28
A9
25 OE/Vp-p
IN
24
A10
27
A11
24 A10
IN
3
A12
30
A13
23 CE
IN
31
A14
2
A15
22 DQ7
I/O
CE OE/Vpp
23 25
21 DQ6
I/O
18 19 20
A0 - A15
; ADDRESS INPUT
CE ; CHIP ENABLE INPUT
DQ0 - DQ7 ; DATA OUTPUT
OE ; OUTPUT ENABLE INPUT
V ; PROGRAM VOLTAGE INPUT
PP
FUNCTION
READ
OUTPUT DISABLE
STANDBY
0 : LOW LEVEL
PGM
1 : HIGH LEVEL
PGM VERIFY
: DON'T CARE
X
HI-Z: HIGH IMPEDANCE
PGM INH
OUTPUT BUFFERS
Y-GATING
512k-BIT
CELL MATRIX
SM5872AS-ET (NPC)FLAT PACKAGE
C-MOS 2-CHANNEL D/A CONVERTER FOR DIGITAL AUDIO
–TOP VIEW–
XTO 1
OUT
13
2 XGND
DQ0
14
DQ1
15
CKSL 3
DQ2 OUT
18
DQ3
19
CKO 4
DQ4 OUT
20
DQ5
21
MUTEO 5
DQ6 OUT
22
DQ7
MUTEI 6
IN
MCON 7
IN
LRCI 8
IN
BCKI 9
IN
DI 10
IN
MDT/FSEL1 11
IN
MCK/FSEL2 12
IN
MLEN/DEEM 13
IN
RSTN 14 DGND
IN
AV , AGND ; ANALOG
DD
DV , DGND ; DIGITAL
DD
XV , XGND ; FOR CRYSTAL OSCILLATOR
DD
INPUT
BCKI ; BIT CLOCK
CKSL ; SYSTEM CLOCK SELECT (L : 256fs/H : 512fs)
DI ; DATA
LRCI ; SAMPLE RATE (fs) CLOCK (L : R-CH/H : L-CH)
MCK/FSEL2 ; MCON = H : MICROCOMPUTER INTERFACE CLOCK
MCON = L : FILTER SELECT*
MCON ; INTERFACE SELECT CONTROL*
MDT/FSEL1 ; MCON = H : MICROCOMPUTER INTERFACE DATA
MCON = L : FILTER SELECT*
MLEN/DEEM ; MCON = H : MICROCOMPUTER INTERFACE LATCH ENABLE
MCON = L : DEEMPHASIS CONTROL
MUTEI ; DF OUTPUT SOFT MUTE (L : OFF/H : ON)
RSTN ; SYSTEM RESET
XTI ; OSCILLATOR
*1
MCON
0
1
0 ; LOW LEVEL
1 ; HIGH LEVEL
OUTPUT
CKO ; CLOCK
LO ; L-CH PWM (PULSE WIDTH MODULATION) ( )
LON ; L-CH PWM (PULSE WIDTH MODULATION) ( )
MUTEO ; INFINITY ZERO DETECT
RO ; R-CH PWM (PULSE WIDTH MODULATION) ( )
RON ; R-CH PWM (PULSE WIDTH MODULATION) ( )
XTO ; OSCILLATOR
10 INPUT
DI
INTERFACE
AND
5
INFINITY•ZERO
MUTEO
DETECTOR
9
BCKI
11
MDT/FSEL1
MICROCOMPUTER
12
INTERFACE
MCK/FSEL2
AND
13
MLEN/DEEM
DEEMPHASIS
7
SELECT
MCON
6 ATTENUATION
MUTEI
COUNTER
14
RSTN
TIMING
3
CONTROL
CKSL
8
LRCI
28
XTI
1
XTO
4
CKO
10
DI
28 XTI
IN
9
BCKI
XV
DD
27
(+5V)
AV
DD
26
11
(+5V)
MDT/FSEL1
12
MCK/FSEL2
25 RO
OUT
13
MLEN/DEEM
7
MCON
AGND 24
6
MUTEI MUTEO
23 RON
OUT
14
AV RSTN
DD
22
3
(+5V)
CKSL
8
LRCI
AV
DD
21
(+5V)
28
XTI
20 LON
OUT
AGND 19
18 LO
OUT
AV
DD
17
(+5V)
DV
DD
16
(+5V)
15
2
1
2
*2
MODE MCON FSEL1
FSEL1, FSEL2, DEEM 0 0 0 (44.1kHz)
MDT, MCK, MLEN 0 1 0 (44.1kHz)
0 ; LOW LEVEL
1 ; HIGH LEVEL
L FILTER L L
PWM
OPERATION NOISE SHAPE
DATA
AND OPERATION
GENERATOR
R R R
ATTENUATION BLOCK
BLOCK
OPERATION
18
LO
20
LON
25
RO
23
RON
5
1
XTO
4
CKO
FSEL2
1 (48.0kHz)
1 (32.0kHz)
18
LO
20
LON
25
RO
23
RON
CA-755/755P