參數(shù)資料
型號： MCIMX258CVM4
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 400 MHz, MICROPROCESSOR, PBGA400
封裝： 17 X 17 MM, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MAPBGA-400
文件頁數(shù)： 131/154頁
文件大?。?/td> 1498K
代理商： MCIMX258CVM4
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 8
78
Freescale Semiconductor
Figure 49. DTACK Read Access
Table 57. WEIM Asynchronous Timing Parameters Relative to Chip Select Table
Ref No.
Parameter
Determination By
Synchronous Measured
Parameters1
Min
Max
(If 133 MHz is
supported by SoC)
Unit
WE31
CS[x] valid to Address Valid
WE4 – WE6 – CSA2
—
3 – CSA
ns
WE32
Address Invalid to CS[x] invalid
WE7 – WE5 – CSN3
—3 – CSN
ns
WE32A(
muxed
A/D
CS[x] valid to Address Invalid
WE4 – WE7 + (LBN + LBA + 1
– CSA2)
–3 + (LBN + LBA +
1 – CSA)
—ns
WE33
CS[x] Valid to WE Valid
WE8 – WE6 + (WEA – CSA)
—
3 + (WEA – CSA)
ns
WE34
WE Invalid to CS[x] Invalid
WE7 – WE9 + (WEN – CSN)
—
3 – (WEN_CSN)
ns
WE35
CS[x] Valid to OE Valid
WE10 – WE6 + (OEA – CSA)
—
3 + (OEA – CSA)
ns
WE35A
(muxed
A/D)
CS[x] Valid to OE Valid
WE10 – WE6 + (OEA + RLBN
+ RLBA + ADH + 1 – CSA)
–3 + (OEA +
RLBN + RLBA +
ADH + 1 – CSA)
3 + (OEA + RLBN +
RLBA + ADH + 1 –
CSA)
ns
WE36
OE Invalid to CS[x] Invalid
WE7 – WE11 + (OEN – CSN)
—
3 – (OEN – CSN)
ns
WE37
CS[x] Valid to EB[y] Valid (Read
access)
WE12 – WE6 + (RBEA – CSA)
—
3 + (RBEA4 – CSA)
ns
WE38
EB[y] Invalid to CS[x] Invalid
(Read access)
WE7 – WE13 + (RBEN – CSN)
—
3 – (RBEN5 – CSN)
ns
WE39
CS[x] Valid to LBA Valid
WE14 – WE6 + (LBA – CSA)
—
3 + (LBA – CSA)
ns
WE40
LBA Invalid to CS[x] Invalid
WE7 – WE15 – CSN
—
3 – CSN
ns
Last Valid Address
Address V1
V1
ADDR
DATA
RW
LBA
OE
EB[y]
CS [x]
Next Address
WE39
WE35
WE37
WE32
WE36
WE38
WE43
WE40
WE31
WE44
DATA
WE47
WE48
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相關代理商/技術參數(shù)
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