I.MX27 Datasheet, PDF (93/148 Pages) Freescale Semiconductor, Inc – Multimedia Applications Processor

Electrical Characteristics
BCLK (for rising edge timing)
WEIM Outputs Timing
WE21
WE22
...
...
BCLK (for falling edge timing)
WE1
Address
CS[x]
WE3
RW
WE5
WE23
WE2
WE4
WE6
WE7
OE
EB[x] ^WE9
WE8
WE10
WE11
LBA
WE12
WE13
Output Data
WE14
WEIM Inputs Timing
BCLK (for rising edge timing)
Input Data
ECB
DTACK
WE15
WE17
WE16
WE18
WE20
WE19
Figure 53. WEIM Bus Timing Diagram
Table 50. WEIM Bus Timing Parameters
ID
Parameter
WE1 Clock fall to address valid
WE2 Clock rise/fall to address invalid
WE3 Clock rise/fall to CS[x] valid
WE4 Clock rise/fall to CS[x] invalid
1.8 V
Min
Max
0.68
2.05
0.68
2.49
0.45
2.25
0.45
2.25
Unit
ns
ns
ns
ns
i.MX27 and i.MX27L Data Sheet, Rev. 1.5
Freescale Semiconductor
93