Pioneer VSX-D509S, Service Manual

Page: 53 / 61

53
VSX-D509S
W24257AJ-12 (D.D & INPUT ASSY : IC1301)
• 32K
×
8 High-Speed CMOS Static RAM
•
Block Diagram
•
Pin Function
VDD
DSS
A0
A14
28
14
10
1
20
22
27
I/O8
19
I/O1 11
CS
OE
WE
DECORER
DATA I/O
CORE
ARRAY
CONTROL
No. Pin Name Function
1 A14
2 A12
3 A7
4 A6
5 A5
6 A4
7 A3
8 A2 Addres Inputs
9 A1
10 A0
21 A10
23 A11
24 A9
25 A8
26 A13
11 I/O1
12 I/O2
13 I/O3
15 I/O4
Data Inputs/Outputs
16 I/O5
17 I/O6
18 I/O7
19 I/O8
14 Vss Ground
20 CS Chip Select Input
22 OE Output Enable Input
27 WE Write Enable Input
28 Vdd Power Supply
TC9273F-007 (D.D & INPUT ASSY : IC101)
• Analog Switch Array
•
Block Diagram
•
Pin Function
VDD DSS
S1
28 1
CK GND
14 13
STB DATA
16 15
2
S2 3
S3
4
S4
5
S5
6
S6
7
S7
8
S8
9
S9
10
Level Shift + Shift Register Circuit
(L-ch)
10 bit
Latch
Circuit
(R-ch)
10 bit
Latch
Circuit
S10
11
S11
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
12
27
26
25
24
23
22
21
20
19
18
17
No. Pin Name Function
1 VSS Minus Power Supply
2, 27 S1
3, 26 S2
4, 25 S3
5, 24 S4
6, 23 S5
7, 22 S6 Input and Output
8, 21 S7
9, 20 S8
10, 19 S9
21, 18 S10
26, 17 S11
13 GND Digital Ground
14 CK Clock Input
15 DATA Data Input
16 STB Strobe Input
28 VDD Plus Power Supply