I.MX27 Datasheet, PDF (95/148 Pages) Freescale Semiconductor, Inc – Multimedia Applications Processor

Electrical Characteristics
Figure 54, Figure 55, Figure 34, Figure 57, Figure 58, and Figure 59 show examples of basic WEIM
accesses to external memory devices with the timing parameters mentioned in Table 50 for specific control
parameter settings.
BCLK
ADDR
CS[x]
WE1
Last Valid Address
WE3
WE2
V1
Next Address
WE4
RW
LBA
OE
EB[y]
DATA
WE11
WE12
WE7
WE8
WE9
WE10
WE16
V1
WE15
Figure 54. Asynchronous Memory Timing Diagram for
Read Access—WSC=1
BCLK
ADDR
CS[x]
RW
LBA
WE1
Last Valid Address
WE3
WE5
WE11
WE2
V1
WE4
WE6
WE12
Next Address
OE
EB[y]
DATA
WE9
WE10
V1
WE13
WE14
Figure 55. Asynchronous Memory Timing Diagram for
Write Access—WSC=1, EBWA=1, EBWN=1, LBN=1
i.MX27 and i.MX27L Data Sheet, Rev. 1.5
Freescale Semiconductor
95