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參數(shù)資料
| 型號： | KM718V889 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | 256Kx18 Synchronous SRAM(256Kx18位同步靜態(tài) RAM) |
| 中文描述： | 256Kx18同步SRAM（256Kx18位同步靜態(tài)內(nèi)存） |
| 文件頁數(shù)： | 14/15頁 |
| 文件大小： | 314K |
| 代理商： | KM718V889 |
KM718V889
256Kx18 Synchronous SRAM
- 14 -
Rev 1.0
May. 1998
APPLICATION INFORMATION
DEPTH EXPANSION
The Samsung 256Kx18 Synchronous pipelined Burst SRAM has two additional chip selects for simple depth expansion.
This permits easy secondary cache upgrades from 256K depth to 512K depth without extra logic.
Data
Address
CLK
ADS
Microprocessor
CS
2
CS
2
CLK
ADSC
WEx
OE
CS
1
Address
Data
ADV
ADSP
256Kx18
SPB
SRAM
(Bank 0)
CS
2
CS
2
CLK
ADSC
WEx
OE
CS
1
Address
Data
ADV
ADSP
256Kx18
SPB
SRAM
(Bank 1)
CLK
Address
Cache
Controller
A
[0:18]
A
[18]
A
[0:17]
A
[18]
A
[0:17]
I/O
[0:71]
Clock
ADSP
ADDRESS
[0:n]
Data Out
(Bank 0)
Bank 0 is selected by
CS
2
, and Bank 1 deselected by
CS
2
Q1-1
Q1-2
Q1-4
Q1-3
OE
Data Out
(Bank 1)
t
SS
t
SH
A1
A2
WRITE
CS
1
A
n+1
ADV
Q2-2
Q2-4
Q2-3
t
AS
t
AH
t
WS
t
WH
t
ADVS
t
ADVH
t
OE
t
LZOE
t
HZC
Bank 0 is deselected by
CS
2
, and Bank 1 selected by
CS
2
t
CSS
t
CSH
t
CD
t
LZC
Q2-1
INTERLEAVE READ TIMING
(Refer to non-interleave write timing for interleave write timing)
(ADSP CONTROLLED , ADSC=HIGH)
Don
′
t Care
Undefined
*NOTES
n = 14 32K depth,
15 64K depth, 16 128K depth, 17 256K depth
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