mcimx27- Freescale Semiconductor, Inc, mcimx27- Datasheet - Page 93

• Manufacturer Part Number: mcimx27-
• Description: Multimedia Applications Processor
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
1
WE10
WE11
WE12
WE13
WE14
WE15
WE16
WE17
WE18
WE19
WE20
WE21
WE22
WE23
WE24
WE25
WE26
WE27
WE5
WE6
WE7
WE8
WE9
BCLK parameters are being measured from the 50% point—that is, high is defined as 50% of signal
value and low is defined as 50% of signal value.
ID
High is defined as 80% of signal value and low is defined as 20% of signal
value.
Test conditions: pad voltage, 1.7–1.95 V; pad capacitance, 25 pF.
Recommended drive strength for all controls, address, and BCLK is Max
High.
Clock rise/fall to RW Valid
Clock rise/fall to RW Invalid
Clock rise/fall to OE Valid
Clock rise/fall to OE Invalid
Clock rise/fall to EB[x] Valid
Clock rise/fall to EB[x] Invalid
Clock rise/fall to LBA Valid
Clock rise/fall to LBA Invalid
Clock rise/fall to Output Data Valid
Clock rise to Output Data Invalid
Input Data Valid to Clock rise, FCE=0
Cloc/k rise to Input Data Invalid, FCE=0
Input Data Valid to Clock rise, FCE=1
Clock rise to Input Data Invalid, FCE=1
ECB setup time, FCE=0
ECB hold time, FCE=0
ECB setup time, FCE=1
ECB hold time, FCE=1
DTACK setup time
DTACK hold time
BCLK High Level Width
BCLK Low Level Width
BCLK Cycle time
Table 50. WEIM Bus Timing Parameters (continued)
1
Preliminary—Subject to Change Without Notice
i.MX27 and i.MX27L Data Sheet, Rev. 1.2
1
1
Parameter
NOTE
0.90
0.90
1.17
1.17
0.73
0.73
1.03
1.03
1.04
1.04
6.95
2.35
1.24
0.23
7.23
2.93
1.08
5.35
3.19
Min
3.0
3.0
7.5
0
1.8 V
Max
2.60
2.60
3.57
3.57
2.43
2.43
2.84
2.84
4.01
4.01
—
—
—
—
—
—
—
—
—
—
—
—
—
Unit
Signal Descriptions
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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