DX-SX1H
– 65 –
IC903 RH-iX2840AFZZ: 16Mbit SDRAM (IX2840AF)
1
VCC
Power supply (3.3V)
2-5
DQ1-DQ4
Data input/output
6
WE
Write enable
7
RAS
Row address strobe
8*
NC
Not used
9
A10R
Address input
10-13
A0-A3
Address input
14
VCC
Power supply (3.3V)
15
VSS
Ground (0V)
16-21
A4-A9
Address input
22
OE
Output enable
23
CAS
Column address strobe
24-27
DQ5-Q8
Data input/output
28
VSS
Ground (0V)
Pin No.
Terminal Name
Function
In this unit, the terminal with asterisk mark (*) is (open)
terminal which is not connected to the outside.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
CC
DQ1
DQ2
DQ3
DQ4
WE
RAS
NC
A10R
A0
A1
A2
A3
V
CC
V
SS
DQ8
DQ7
DQ6
DQ5
CAS
OE
A9
A8
A7
A6
A5
A4
V
SS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
CC
DQ1
DQ2
DQ3
DQ4
WE
RAS
NC
A10R
A0
A1
A2
A3
V
CC
V
SS
DQ8
DQ7
DQ6
DQ5
CAS
OE
A9
A8
A7
A6
A5
A4
V
SS
28 pin plastic SOJ
28 pin plastic TSOP
(Type K)
10
10
10
11
1
8
8
8
8
8
8
DQ1~DQ8
OE
WE
RAS
CAS
A0~A9
A10R
V
CC
V
SS
V
CC
V
SS
TIMING
GENERATOR
INPUT/OUTPUT
CONTROL UNIT
COLUMN •
ADDRESS
BUFFER
COLUMN •
DECODER
INTERNAL
ADDRESS
COUNTER
REFRESH
MASTER CLOCK
SENSE AMPLIFIER
INPUT/
OUTPUT
SELECTOR
ROW
ADDRESS
BUFFER
ROW
DECODER
WORD
DRIVER
MEMORY
CELL
ON CHIP
VCC GENERATOR
OUTPUT
BUFFER
INPUT
BUFFER
Figure 65 BLOCK DIAGRAM OF IC
