Sony CDX-C880R Service Manual page 38

IC4 MB814400C-70PFTN
DQ1 1
DQ2 2
WE 3
WRITE
DATA INPUT
CLOCK
GENERATOR
CLOCK
GENERATOR
2
DECODER
CLOCK
GENERATOR
1
MODE
RAS
4
CONTROL
A9 5
A0
9
A1
10
A2
11
A3 12
VCC
13
IC2 CXD2522R-T6
49
XEMP
50
XWIH
AM4 51
AM3 52
53
AM2
54
AM1
55
AM0
56
VDD
XQOK 57
GSCR 58
SCOR
59
NC 60
NC
61
NC
62
GRST 63
XRST 64
1 2 3
DATA OUTPUT
BUFFER BUFFER
4M BIT
COLUMN SENSE AMP
MEMORY
I/O GATE
CELL
ROW
GENERATOR
DECODER
REFRESH
ADDRESS PRE-
ADDRESS
BUFFER DECODER
COUNTER
48 47 46 45 44 43 42 41 40
CPU I/F
ADDRESS MONITOR
VWA
WRITE
BASE
COUNTER
READ
BASE
COUNTER
DATA
DSP
LINKING
I/F
CONTROL
4 5 6 7 8 9 10 11
IC551 LC89170M-TLM
VSS
26
25 DQ4
DQ3
24
EXCK
1
SBSO 2
SCOR 3
CAS
23
22 OE WFCK
4
5
MCK
BOARD
BIAS
6
XMODE
GND 7
A8
18
17 A7
A6
16
15 A5
14 A4
39 38 37 36 35 34 33
DRAM
I/F
SELECTOR
TIMING
GEN.
DAC DIGITAL
I/F OUT
12 13 14 15 16
– 70 –
CPU INTERFACE
32 WORD X 8 BIT CRC
DUAL PORT RAM CHECKER
TIMING
&
SYNCHRONIZATION
SIGNAL
PROTECTION
32 XCAS
31 D4
30
D3
29 D0
28 D1
27 XWE
26 XRAS
25
A9
24 VDD
23 A0
22
A1
21 A2
20
A3
19 C176
18
DOUT
17
LRCK
VDD
14 VDD
13
DQSY
SRDT
12
11 SCLK
10 SW2
9 SW1
8 TEST