Sharp SD-CX1W(BL), Service Manual

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SD-CX1W
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IC1202 RH-iX2474AFZZ: 4Mbit D-RAM (IX2474AF)
Pin No.
Function
Terminal Name
1, 2 DQ0, DQ1 Data input/Data output.
3 WE Write enable.
4 RAS Row address storobe.
5 A9 Address input.
6-9 A0-A3 Address input.
10 VDD Power (3.3 V).
11-15 A4-A8 Address input.
16 OE Output enable.
17 CAS Column address storobe.
18, 19 DQ2, DQ3 Data input/Data output.
20 VSS Ground (0 V).
IC1301 VHiFTD2005/-1: Head Driver (FTD2005) IC1302 VHiCPH5608/-1: Head Driver (CPH5608)
IC1402 VHi58X2402T-1: EEPROM (58X2402T)
Pin No.
Function
Terminal Name
1-3 A0-A2 Device address.
4 VSS Ground
5 SDA Serial data input/output.
6 SCL Serial clock input.
7 WP Write protect.
8 VCC Power supply.
Figure 94-1 BLOCK DIAGRAM OF IC
Figure 94-2 BLOCK DIAGRAM OF IC
Figure 94-3 BLOCK DIAGRAM OF IC
Figure 94-4 BLOCK DIAGRAM OF IC
4
RAS
5
17
15
CAS
A0
A9
WE
DQ0
20
V
SS
V
BB
17
CAS
Clock Generator
CBR Refresh
Counter
Row Address
Buffer
Memory
Cell
I/O
Selection
Write Clock
Generator
Data Input
Buffer
Data Output
Buffer
Row Address
Buffer
On ChipVBB
Generator
Row Decoder
Column Decoder Sense Amp.
Word Driver
SELF Refresh
Timer
MN42V4400 Only
3
OE
16
2
18
19
1
DQ1
DQ2
DQ3
D2
S2
S2
G2
D1
S1
S1
G1 5
6
7
8
4
3
2
1
G1 S G2
D1 D2
1 2
3 4 5
1 2 3 4
8 7 6 5
A0 A1 A2 VSS
VCC
WP
SCL
SDA