Marantz SA-14, Service Manual

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2-29 2-30
IC802 RH-iX1535GEZZ: Input/Output Expander (IX1535GE) (2/2)
60 MODE Input Mode switching terminal. Fix at "L".
61 BUFCO Input/Output Buffer output C
62 TEST Input Test terminal. Fixed at "L".
63 BUFCI Input Buffer input C. Not used.
64 VSS - Digital GND
Pin No. Terminal Name Input/Output Function
Pins 1 to 15: Simultaneous changes possible. Operating frequency: approx. 10MHz
Pins 18 to 47: Simultaneous changes possible. (Static signal) Operating frequency: approx. 1kHz
Pins 50 to 57: Simultaneous changes almost impossible. Operating frequency: approx. 1kHz
Data Buffer
Latch D
Data Buffer
Latch C
Data Buffer
Latch B
Data Buffer
Latch A
Data Buffer
R/W CTL
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
32
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
VDD
EXPD(3)
EXPD(4)
EXPD(5)
BUFDO
BUFDI
SBUFBO
SBUFBI
SBUFAO
SBUFAI
MRST
MODE
BUFCO
TEST
BUFCI
VSS
VSS
EXPBL(3)
EXPBL(2)
EXPBL(1)
EXPBL(0)
EXPAU(3)
EAPAU(2)
VDD
VSS
EXPAU(1)
EXPAU(0)
EXPAL(3)
EAPAL(2)
EXPAL(1)
EAPAL(0)
VDD
VSS
Q2(3)
Q2(2)
Q2(1)
Q2(0)
Q1(7)
Q1(6)
VDD
VSS
Q1(5)
A1(4)
Q1(3)
Q1(2)
Q1(1)
Q1(0)
VDD
VDD
SOUT(3)
SOUT(4)
SOUT(5)
MRST
MODE
SEL
TEST
CK
VSS
VSS EXPD(2) EXPD(1) EXPD(0) EXPC(5) EXPC(4) EXPC(3) VSS EXPC(2) EXPC(1) EXPC(0) EXPBU(3) EXPBU(2) EXPBU(1) EXPBU(0) VDD
VDD
HADR0 HADR1 HADR2
HCS
HWR
HRD
HDAT0 HDAT1 HDAT2 HDAT3 HDAT4 HDAT5 HDAT6 HDAT7
VSS
VDD D(0) D(1) D(2) D(3) D(4) D(5) D(6) D(7) S1(0) S1(1) S1(2) S1(3) S1(4) S1(5) VSS
VSS SOUT(2) SOUT(1) SOUT(0) S2(5) S2(4) S2(3) VSS S2(2) S2(1) S2(0) Q2(7) Q2(6) Q2(5) Q2(4) VDD
INPUT/
OUTPUT
PINS
INPUT/OUTPUT
PINS
INPUT/OUTPUT PINS
OPEN DRAIN WHEN
OUTPUTTING
INPUT/OUTPUT
PINS
INPUT/OUTPUT
PINS
INPUT/
OUTPUT
PINS
DEDICATED
PINS
IC804 RH-iX2839AFZZ: 1Mbit SRAM (IX2839AF)
1* NC Not used
2 A16 Address input
3 A14 Address input
4 A12 Address input
5-12 A7-A0 Address input
13-15 I/O1-I/O3 Data input/output
16 GND Ground
17-21 I/O4-I/O8 Data input/output
22 CE1 Chip enable input
23 A10 Address input
24 OE Output enable input
25 A11 Address input
26, 27 A9, A8 Address input
28 A13 Address input
29 R/W Read/Write input
30 CE2 Chip enable input
31 A15 Address input
32 VDD Power terminal (+5V)
Pin No. Terminal Name
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Function
A4
CE
A5
A6
A7
A8
A12
A13
A14
A15
A16
I/O1
I/O8
OE
R/W
CE1
CE2
MEMORY CELL
ARRAY
1024 x 28 x 8
(1048576)
VDD
GND
~
CE
A0
A1
A2
A3
A9
A10
A11
CE
ROW ADDRESS
BUFFER
ROW ADDRESS
REGISTER
ROW ADDRESS
DECODER
DATA CONTROL
CLOCK
GENERATOR
SENSE AMPLIFIER
COLUMN ADDRESS
DECODER
COLUMN ADDRESS
REGISTER
COLUMN ADDRESS
BUFFER
(TOP VIEW)
N.C.
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O1
I/O2
I/O3
GND
VDD
A15
CE2
R/W
A13
A8
A9
A11
OE
A10
CE1
I/O8
I/O7
I/O6
I/O5
I/O4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17