MCIMX31LITEKITC Freescale Semiconductor, MCIMX31LITEKITC Datasheet - Page 43

• Manufacturer Part Number: MCIMX31LITEKITC
• Description: BOARD DEV FOR I.MX31
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of MCIMX31LITEKITC

• Contents: Module and Misc Hardware
• For Use With/related Products: i.MX31
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure
basic WEIM accesses to external memory devices with the timing parameters mentioned in
Table 33
Freescale Semiconductor
28,
1
2
3
WE10
WE11
WE18
WE19
WE20
WE22
WE23
WE12
WE13
WE14
WE15
WE16
WE17
WE21
for specific control parameter settings.
WE8
WE9
Applies to rising edge timing
BCLK parameters are being measured from the 50% VDD.
The actual cycle time is derived from the AHB bus clock frequency.
ID
Figure
High is defined as 80% of signal value and low is defined as 20% of signal
value.
Test conditions: load capacitance, 25 pF. Recommended drive strength for all
controls, address, and BCLK is Max drive.
Clock rise to Output Data Invalid
Clock rise to Input Data Invalid, FCE=0
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
Input Data Valid to Clock rise, FCE=0
ECB setup time, FCE=0
ECB hold time, FCE=0
DTACK setup time
DTACK hold time
BCLK High Level Width
BCLK Low Level Width
BCLK Cycle time
29,
Figure
Table 33. WEIM Bus Timing Parameters (continued)
30,
FCE=1
FCE=1
1
2
1
Figure
MCIMX31/MCIMX31L Technical Data, Rev. 4.1
2, 3
2, 3
Parameter
31,
FCE=1
FCE=1
Figure
NOTE
32, and
Figure 33
depict some examples of
–2.5
–2.5
Min
2.5
6.5
3.5
4.5
–3
–3
–3
–3
–3
–2
–2
–2
—
—
15
8
2
0
T/2 – 3
T/2 – 3
Electrical Characteristics
Max
—
—
—
—
—
—
—
3
3
3
3
3
4
4
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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