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参数资料
| 型号： | WED9LAPC2C16V8BC |
| 厂商： | WHITE ELECTRONIC DESIGNS CORP |
| 元件分类： | 存储器 |
| 英文描述： | SPECIALTY MEMORY CIRCUIT, PBGA192 |
| 封装： | 21 X 21 MM, BGA-192 |
| 文件页数： | 22/24页 |
| 文件大小： | 933K |
| 代理商： | WED9LAPC2C16V8BC |
7
White Electronic Designs Corporation (602) 437-1520 www.wedc.com
White Electronic Designs
WED9LAPC2C16V8BC
July, 2000
Rev. 0
White Electronic Designs Corp. reserves the right to change products or specications without notice.
SDRAM COMMAND TRUTH TABLE
NOTES:
1. All of the SDRAM operations are dened by states of VCWE#, VCRAS#, VCCAS#, and VCDQM# at the positive rising edge of the clock.
2. Bank Select (VCBS), if VCBS = 0 then bank A is selected, if VCBS = 1 then bank B is selected.
3. During a Burst Write cycle there is a zero clock delay, for a Burst Read cycle the delay is equal to the CAS latency.
4. The VCDQM# has two functions for the data DQ Read and Write operations. During a Read cycle, when VCDQM# goes high at a clock timing the
data outputs are disabled and become high impedance after a two clock delay. VCDQM# also provides a data mask function for Write cycles. When
it activates, the Write operation at the clock is prohibited (zero clock latency).
FUNCTION
VCRAS# VCCAS#
VCWE#
VCDQM#
VCBS
VCADDR
NOTES
Mode Register Set
L
X
OP CODE
Auto Refresh (CBR)
L
H
X
Precharge
Single Bank
L
H
L
X
BA
L
2
Precharge all Banks
L
H
L
X
H
Bank Activate
L
H
X
BA
Row Address
2
Write
H
L
X
BA
L
2
Write with Auto Precharge
H
L
X
BA
H
2
Read
H
L
X
BA
L
2
Read with Auto Precharge
H
L
H
X
BA
H
2
Burst Termination
H
L
X
3
No Operation
H
X
Data Write/Output Disable
X
L
X
4
Data Mask/Output Disable
X
H
X
4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| WED9LAPC2C16V8BI | 制造商:WEDC 制造商全称:White Electronic Designs Corporation 功能描述:512K x 32 SSRAM / 1M x 64 SDRAM |
| WED9LAPC3C16V8BC | 制造商:WEDC 制造商全称:White Electronic Designs Corporation 功能描述:512K x 32 SSRAM / 1M x 64 SDRAM |
| WED9LAPC3C16V8BI | 制造商:WEDC 制造商全称:White Electronic Designs Corporation 功能描述:512K x 32 SSRAM / 1M x 64 SDRAM |
| WED9LC6416V | 制造商:未知厂家 制造商全称:未知厂家 功能描述:128Kx32 SSRAM/4Mx32 SDRAM |
| WED9LC6416V1310BC | 制造商:未知厂家 制造商全称:未知厂家 功能描述:128Kx32 SSRAM/4Mx32 SDRAM |
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