MCIMX257CJM4A Freescale, MCIMX257CJM4A Datasheet - Page 79

• Manufacturer Part Number: MCIMX257CJM4A
• Manufacturer: Freescale

Specifications of MCIMX257CJM4A

• Lead Free Status / RoHS Status: Compliant

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Note: All configuration parameters (CSA,CSN,WBEA,WBEN,LBA,LBN,OEN,OEA,RBEA & RBEN) are in cycle units.
Freescale Semiconductor
Ref No.
WE40A
WE41A
(muxed
(muxed
WE41
WE42
WE43
WE44
WE45
WE46
WE47
WE48
For the value of parameters WE4–WE21, see column BCD = 0 in
CS Assertion. This bit field determines when the CS signal is asserted during read/write cycles.
CS Negation. This bit field determines when the CS signal is negated during read/write cycles.
BE Assertion. This bit field determines when the BE signal is asserted during read cycles.
BE Negation. This bit field determines when the BE signal is negated during read cycles.
Output maximum delay from internal driving ADDR/control FFs to chip outputs.
Output maximum delay from CS[x] internal driving FFs to CS[x] out.
DATA maximum delay from chip input data to its internal FF.
A/D)
A/D)
DTACK maximum delay from chip dtack input to its internal FF.
Table 55. WEIM Asynchronous Timing Parameters Relative to Chip Select Table (continued)
CS[x] Valid to Output Data Valid
CS[x] Valid to Output Data Valid
CS[x] Invalid to DTACK invalid
DTACK Valid to CS[x] Invalid
EB[y] Invalid to CS[x] Invalid
Output Data Invalid to CS[x]
CS[x] Valid to LBA Invalid
CS[x] Invalid to Input Data
CS[x] Valid to EB[y] Valid
Input Data Valid to CS[x]
(Write access)
(Write access)
Parameter
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 6
Invalid
Invalid
invalid
WE14 – WE6 + (LBN + LBA + 1
WE12 – WE6 + (WBEA – CSA)
WE7 – WE13 + (WBEN – CSN)
MAXCO – MAXCSO + MAXDTI
MAXCO – MAXCSO + MAXDI
WLBA + ADH + 1 – WCSA)
Synchronous Measured
WE16 – WE6 + (WLBN +
WE16 – WE6 – WCSA
WE17 – WE7 – CSN
Determination By
Parameters
– CSA)
0
0
1
Table
54.
–3 + (LBN + LBA +
MAXCSO
e:
MAXCSO
MAXCO
MAXCO
+ MAXDTI
1 – CSA)
MAXDI
Min
—
—
—
—
—
0
0
7Note:Not
6
6 –
8
7
–
+
9
3 + (WLBN + WLBA +
3 + (LBN + LBA + 1 –
–3 + (WBEN – CSN)
supported by SoC)
3 + (WBEA – CSA)
ADH + 1 – WCSA)
(If 133 MHz is
3 – WCSA
3 – CSN
CSA)
Max
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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