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參數資料
型號: W971632AF
廠商: WINBOND ELECTRONICS CORP
英文描述: 256K x 32 bit x 2 Banks SGRAM(256K x 32位 x 2組同步圖形RAM)
中文描述: 256K × 32位× 2銀行SGRAM(256K × 32位× 2組同步圖形RAM)的
文件頁數: 6/55頁
文件大小: 2653K
代理商: W971632AF
W971632AF
256K x 32 bit x 2 Banks SGRAM
Revision 1.0 Publication Release Date: March, 1999
- 6 -
AC CHARACTERISTICS AND OPERATING CONDITION ( 5, 6, 7 )
(Vcc=3.3V
±
0.3V, Ta=0
°
to 70
°
C)
-7
-8
-10
SYMBOL
PARAMETER
MIN
70
49
21
7
21
14
7
7
12
2.5
2.5
MAX
MIN
72
48
24
8
24
16
8
8
13
3
3
MAX
MIN
80
50
30
10
30
20
10
10
15
3.5
3.5
MAX
UNIT
NOTE
t
RC
t
RAS
t
RCD
t
CCD
t
RP
t
RRD
t
WR
t
CK
Ref/Active to Ref/Active Command Period
Active to Precharge Command Period
Active to Read/Write Command Delay
Read/Write to Read/Write Command Period
Precharge to Active Command Period
Active to Active Command Period
Write Recovery Time
CLK Cycle Time (CL=3)
CLK Cycle Time (CL=2)
CLK High Level width
CLK Low Level width
Access Time from CLK (CL=3)
Access Time from CLK (CL=2)
Output Data Hold Time
Output Data High Impedance Time
Output Data Low Impedance Time
Transition Time of CLK (Rise and Fall)
Data-in Set-up Time
Data-in Hold Time
Address Set-up Time
Address Hold Time
CKE Set-up Time
CKE Hold Time
Command Set-up Time
Command Hold Time
Refresh Time
Mode Register Set Cycle Time
Block Write Cycle Time
Block Write to precharge Time
100000
100000
100000
1000
1000
1000
t
CH
t
CL
t
AC
6
7
6.5
7
7
8
t
OH
t
HZ
t
LZ
t
T
t
DS
t
DH
t
AS
t
AH
t
CKS
t
CKH
t
CMS
t
CMH
t
REF
t
RSC
t
BWC
t
BWL
2.5
2.5
2.5
ns
6
6.5
7
8
8
1
1
1
1
1
0.5
2
1
2
1
2
1
2
1
10
10
10
2.5
1
2.5
1
2.5
1
2.5
1
2.5
1
2.5
1
2.5
1
2.5
1
32
32
32
ms
14
7
7
16
8
8
20
10
10
ns
(CL=CAS Latency)
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