Yamaha DSP-A595 Service Manual page 35

DSP-A595
QQ
3 7 63 1515 0
IC5 : M5M51288BKJ-20LTEL (1M SRAM)
131072-word x 8 bit High Speed Static RAM
NC 1
2
A3
A4 3
4
A5
A6 5
6
A7
A8 7
TOP VIEW
8
A9
A10 9
A11 10
A12 11
A13 12
D1 13
D2 14
15
D3
GND 16
TE
L 13942296513
IC6 : AK4526 (CODEC AD/DA)
20 bit 6 channel A/D, D/A Converter
1
SDOS
OCKS 2
M/S 3
BICK 4
5
LRCK
TOP VIEW
SDTI1 6
SDTI2 7
www
SDTI3 8
SDTO 9
DAUX 10
11
DFS
.
29
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A0
27
32 VCC
A1
28
31
A2
A2
31
A3
2
30 CE2
A4
3
29
/WE
A5
4
28 A1 A6
5
A7
6
27
A0
A8
7
26 A16
25
A15
A9
8
24 /OE
A10
9
23 A14 A11
10
A12
11
22 /CE1
A13
12
21 D8
A14
23
A15
25
20 D7
A16
26
19 D6
18
D5
17 D4
/CE1
22
CE2
30
/WE
29
/OE
24
/CE1
X
H
L
L
L
NOTE) H: High Level
33
VREFL
32 RIN+
31 RIN–
30 LIN+
29
LIN–
28
ROUT1
27 LOUT1
26 ROUT2
25 LOUT2
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24 ROUT3
23
LOUT3
i
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2 9
8
18 512
131072-word x 8 bit
MEMORY ARRAY
(512-row X 2048-column)
2048
COLUMN I/O
256
COLUMN ADDRESS
DECODER
16
COLUMN INPUT
BUFFER
CHIP SELECT
WRITE CONTROL
OUTPUT CONTROL
Q Q
3 6 7 1 3 1 5
CE2 /WE /OW Mode
Non-selectable High impedance
L X X
Non-selectable High impedance
X X X
Write mode Input
H L X
Read mode Output
H H L
High impedance
H H H
L: Low level X: Don't care
LIN+
30
ADC HPF
LIN–
29
RIN+
32
ADC HPF
RIN–
31
LOUT1
27 VR LPF DAC
ROUT1 VR LPF DAC
28
LOUT2 VR LPF DAC
25
ROUT2
26 VR LPF DAC
co
LOUT2
23 VR LPF DAC
.
ROUT3
24 VR LPF DAC
9 4 2 8
32 VCC
16 GND
13 D1
14 D2
15 D3
D4
17
D5
18
19 D6
20 D7
21 D8
0 5 8 2 9 9 4 2 8
Data I/O Power
On
Standby
On
On
On
Audio
I/F
1/2
MCKI
MCLK
39
LRCK
5
4 BICK
DAUX
10
LRCK
DEM0
13
DEM1
BICK 12
DEM
DFS
11
SDOUT
m
1 SDOS
SDIN1
SDIN2
SDIN3 SDTO
9
SDTI1
6
7 SDTI2
SDTI3
8
9 9
9 9