Sharp MD-E9000H Service Manual page 86

MD-E9000H
IC1202 RH-iX2474AFZZ: 4Mbit D-RAM (IX2474AF)
Terminal Name
Pin No.
1, 2 DQ0, DQ1 Data input/Data output.
3 WE Write enable.
4 RAS Row address strobe.
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 strobe.
18, 19 DQ2, DQ3 Data input/Data output.
20 VSS Ground (0 V)
4
RAS
17
CAS
CBR Refresh
Row Address
5
A0
Buffer
Row Address
A9
15
Buffer
20
V
SS
17
CAS
IC1301 VHiFTD2005/-1: Head Driver (FTD2005)
G2 5
S2 6
S2 7
D2 8
Figure 86-2 BLOCK DIAGRAM OF IC
IC1402 VHi58X2402T-1: EEPROM (58X2402T)
Pin No. 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.
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Clock Generator
SELF Refresh
Counter Timer
MN42V4400 only
Row Decoder Word Driver
Column Decoder Sense Amp.
On ChipVBB
V
BB
Generator
Figure 86-1 BLOCK DIAGRAM OF IC
G1
4
S1
3
S1
2
D1
1
1 A0
A1
2
A2
3
VSS
4
Figure 86-4 BLOCK DIAGRAM OF IC
Function
Memory
Cell
I/O
Selection
IC1302 VHiCPH5608/-1: Head Driver (CPH5608)
G1
5
1
D1
Figure 86-3 BLOCK DIAGRAM OF IC
Function
VCC 8
WP
7
SCL
6
SDA
5
– 86 –
Write Clock
3
WE
Generator
Data Input
Buffer
1
2
DQ0-DQ3
18
19
Data Output
16
OE
Buffer
S G2
4 3
2
D2