Marantz CD5001 OSE Service Manual page 23

IC71 : TMP87PS71AF
PIN No. SYMBOL I/O FUNCTION DESCRIPTION
1 RS I REMOCON OUT
2 REMOTE I REMOCON CENSOR CONTROL
3 BUS OUT O GND
4 POWER O POWER CONTROL PORT
5 VFD-POWER O VFD POWER CONTROL PORT
6 DSP-RESET O DSP RESET CONTROL PORT
7 DSP-CCE O DSP CCE CONTROL PORT
8 DSP-BUCK O DSP BUCK CONTROL PORT
9 TEST - GND
12 RESET-INPUT - RESET INPUT PORT
13 XIN - 8MHz Cystal CONNECTION PORT
14 XOUT -
15 VSS - GND
18 VFD-CS O VFD CS CONTROL PORT
19 VFD-CLK O VFD CLK CONTROL PORT
20 MUTE O MUTE
21 VFD-DATA O VFD DATA PORT
22 DISC- O GVSW
SELECTOR
24 VCC O VCC
25 CD-BUS0 I/O
26 CD-BUS1 I/O
BUS CONTROL PORT
27 CD-BUS2 I/O
28 CD-BUS3 I/O
29 INNERSW I L-SWITCH
31 OPEN_SW I OPEN SWITCH
32 CLOSE_SW I CLOSE SWITCH
33 VDD - ST+5V
34 SDA - SDA
35 SCL - SCL
36 PLL - PLL
42 SRAM15 I/O
43 SRAM16 I/O
44 SRAM17 I/O SRAM CONTROL PORT
45 SRAM18 I/O
46 SRAM19 I/O
PIN No. SYMBOL I/O FUNCTION DESCRIPTION
47 SRAM20 I/O
48 SRAM21 I/O
49 SRAM22 I/O
50 SRAM00 O
51 SRAM01 O
52 SRAM02 O
53 SRAM03 O
54 SRAM04 O
55 SRAM05 O
SRAM CONTROL PORT
56 SRAM06 O
57 SRAM07 O
58 SRAM08 O
59 SRAM09
60 SRAM10 O
61 SRAM11 O
62 SRAM12 O
63 SRAM13 O
64 SRAM14 O
66 GND - GND
67 SRAM23 O
68 SRAM24 O SRAM CONTROL PORT
69 SRAM25 O
70 TRANS-ON/ O TRANS ON/OFF CONTROL PORT
OFF
71 TA2125- O STAND BY PORT
STBY-P
72 RC-5 I RC-5 SELECTION
SELECTION
73 DAC-RST O DAC RESET PORT
74 DAC-M2 O DAC M2 PORT
76 KEY I ST+5V
77 KEY I ST+5V
78 KEY I BN72
79 TRAY-OPEN- O MECHA OPEN CONTROL PORT
MOTOR
80 TRAY-CLOSE- O MECHA CLOSE CONTROL PORT
MOTOR
29
IC72 : IS61C256AH
A0-A14
DECODER
VCC
GND
I/O
I/O0-I/O7 DATA
CIRCUIT
CE
CONTROL
OE
CIRCUIT
WE
PIN DESCRIPTIONS
A0-A14 Address Inputs
CE Chip Enable Input
OE Output Enable Input
WE Write Enable Input
I/O0-I/O7 Bidirectional Ports
Vcc Power
GND Ground
TRUTH TABLE
Mode WE WE WE WE WE CE CE CE CE CE OE OE OE OE OE I/O Operation Vcc Current
Not Selected X H X High-Z
(Power-down)
Output Disabled H L H High-Z
Read H L L D
OUT
Write L L X D
IN
32K X 8
MEMORY ARRAY
COLUMN I/O
I , I
1 2
SB SB
I
CC
I
CC
I
CC
IC81 : NJM4556AL
30