Yamaha PSR-S550B, Руководство по обслуживанию

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16
PSR-S550/PSR-S550B
CONTENTS
（目次）
● AK4385ET (X6040A01) DAC ....................................................................................... 16
● MN101C027YB (XS71120R) CPU ............................................................................... 16
● R8A0232BG (X8810A00) CPU (SWX02) ..................................................................... 17
● S1D13700F01A100 (X5422A00) LCD CONTROLLER ............................................... 19
● UPD789022GB-A15-8E (XZ56010R) CPU (MKS) ....................................................... 19
■
LSI PIN DESCRIPTION
（LSI 端子機能表）
AK4385ET (X6040A01) DAC (Digital to Analog Converter)
PIN
NO.
NAME I/O FUNCTION
PIN
NO.
NAME I/O FUNCTION
1 MCLK I Master Clock 9 AOUTR- O Rch Analog out(-)
2 BICK I Audio Serial Data Clock 10 AOUTR+ O Rch Analog out(+)
3 SDTI I Audio Serial Date Input 11 AOUTL- O Lch Analog out(-)
4 LRCK I L/R Clock 12 AOUTL+ O Lch Analog out(+)
5 PDN I Power Down mode 13 Vss - Ground
6 CSN I Chip Select 14 VDD - Power Supply
7 CCLK I Control Data Input 15 DZFR O Rch Data Zero Input Detect
8 CDTI I Control Data Input 16 DZFL O Lch Data Zero Input Detect
DM: IC14
PIN
NO.
I/O FUNCTION NAME
PIN
NO.
I/O FUNCTION NAME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
S1
S2
S3
S4
S5
VREF+
VDD
OSC2
OSC1
VSS
XI
XO
MMOD
RD0
RXD
D0
D1
D2
D3
D4
/RST
D5
D6
D7
D8
D9
S6
S7
S8
S9
S10
S11
I
I
I
I
I
-
-
O
I
-
I
O
I
O
I
O
O
O
O
O
I
O
O
O
O
O
I
I
I
I
I
I
Switch matrix data
Power supply (+5V, analog)
Power supply (+5V)
Crystal oscillator (8MHz)
Crystal oscillator (8MHz)
Ground
Not used
Not used
Memory mode select (Grounded)
Rotary encoder data
MIDI receive data
LED and switch drive data
Reset
LED and switch drive data
Switch matrix data
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64 S12
S13
S14
TXD
S15
S16
S17
S18
L16
L17
L18
L19
L8
L9
L10
L11
L12
L13
L14
L15
L7
L6
L5
L4
L3
L2
L1
L0
VREF
AD0
AD1
S0
I
I
I
O
I
I
I
I
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
-
I
I
I
Switch matrix data
MIDI transmit data
Switch matrix data
LED drive data
LED and switch drive data
Grounded
Analog input
Analog input
Switch matrix data
MN101C027YB (XS71120R) CPU
PNL:IC101