Sony CDX-C7850R Service Manual page 51

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
48 47 46 45 44
CPU I/F
XEMP 49
50
XWIH
ADDRESS MONITOR
AM4 51
AM3 52
AM2 53
WRITE
54
AM1
55
AM0
COUNTER
56
VDD
XQOK 57
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
DATA OUTPUT
BUFFER BUFFER
4M BIT
COLUMN SENSE AMP
MEMORY
I/O GATE
CELL
ROW
GENERATOR
DECODER
REFRESH
ADDRESS PRE-
ADDRESS
BUFFER DECODER
COUNTER
43 42 41 40 39
VWA
BASE
DSP
I/F
7 8 9 10 11 12 13 14
IC551 LC89170M-TLM
26 VSS
25 DQ4
DQ3
24
EXCK 1
SBSO 2
SCOR 3
CAS
23
22 OE
WFCK
4
MCK 5
BOARD
BIAS
XMODE 6
7
GND
A8
18
17 A7
A6
16
15 A5
14 A4
38 37 36 35 34 33
32 XCAS
31 D4
30 D3
29 D0
28 D1
27
DRAM 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
– 69 –
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