Sony CDX-C8850 Service Manual page 58

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