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參數(shù)資料
| 型號(hào)： | KM48S2020C |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | 1M x 8Bit x 2 Banks Synchronous DRAM(1M x 8位 x 2組同步動(dòng)態(tài)RAM) |
| 中文描述： | 1M × 8位× 2銀行同步DRAM（1米× 8位× 2組同步動(dòng)態(tài)RAM）的 |
| 文件頁數(shù)： | 3/44頁 |
| 文件大?。?/td> | 605K |
| 代理商： | KM48S2020C |
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KM48S2020C
REV. 5 Feb. '98
CMOS SDRAM
V
DD
DQ0
V
SSQ
DQ1
V
DDQ
DQ2
V
SSQ
DQ3
V
DDQ
N.C
N.C
WE
CAS
RAS
CS
BA
A10/AP
A0
A1
A2
A3
V
DD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
PIN CONFIGURATION
(Top view)
V
SS
DQ7
V
SSQ
DQ6
V
DDQ
DQ5
V
SSQ
DQ4
V
DDQ
N.C/RFU
N.C
DQM
CLK
CKE
N.C
A9
A8
A7
A6
A5
A4
V
SS
44Pin TSOP (II)
(400mil x 725mil)
(0.8 mm Pin pitch)
PIN FUNCTION DESCRIPTION
Pin
Name
Input Function
CLK
System clock
Active on the positive going edge to sample all inputs.
CS
Chip select
Disables or enables device operation by masking or enabling all inputs except
CLK, CKE and DQM
CKE
Clock enable
Masks system clock to freeze operation from the next clock cycle.
CKE should be enabled at least one cycle prior to new command.
Disable input buffers for power down in standby.
A
0
~ A
10
/AP
Address
Row/column addresses are multiplexed on the same pins.
Row address : RA
0
~ RA
10
, Column address : CA
0
~ CA
8
BA
Bank select address
Selects bank to be activated during row address latch time.
Selects bank for read/write during column address latch time.
RAS
Row address strobe
Latches row addresses on the positive going edge of the CLK with RAS low.
Enables row access & precharge.
CAS
Column address strobe
Latches column addresses on the positive going edge of the CLK with CAS low.
Enables column access.
WE
Write enable
Enables write operation and row precharge.
Latches data in starting from CAS, WE active.
DQM
Data input/output mask
Makes data output Hi-Z, t
SHZ
after the clock and masks the output.
Blocks data input when DQM active.
DQ
0
~
7
Data input/output
Data inputs/outputs are multiplexed on the same pins.
V
DD
/V
SS
Power supply/ground
Power and ground for the input buffers and the core logic.
V
DDQ
/V
SSQ
Data output power/ground
Isolated power supply and ground for the output buffers to provide improved noise
immunity.
N.C/RFU
No connection
/reserved for future use
This pin is recommended to be left No Connection on the device.
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