MCIMX257DJM4A Datasheet, PDF (69/153 Pages) Freescale Semiconductor, Inc – i.MX25 Applications Processor for Consumer and Industrial Products

BCLK
Address
CS[x]
RW
OE
WE4
WE6
WE8
WE10
EB[y]
LBA
WE12
WE14
Output Data
WE16
WEIM Output Timing
WE1
WE2
WE3
...
WE5
WE7
WE9
WE11
WE13
WE15
WE17
WEIM Input Timing
BCLK
WE18, WE19
Input Data
WE22, WE23
ECB
DTACK
WE26
WE20, WE21
WE24, WE25
WE27
Figure 38. WEIM Bus Timing Diagram
Table 56. WEIM Bus Timing Parameters¹
ID
WE1
WE2
WE3
WE4
WE5
WE6
WE7
Parameter
BCLK cycle time²
BCLK low-level width²
BCLK high-level width²
Clock fall to address valid
Clock rise/fall to address invalid
Clock rise/fall to CS[x] valid
Clock rise/fall to CS[x] invalid
Min.
14.5
7
7
15
22
15
3.3
Max.
—
—
—
21
25
19
5
Unit
ns
ns
ns
ns
ns
ns
ns
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 9
Freescale Semiconductor
69