mcimx50 Freescale Semiconductor, Inc, mcimx50 Datasheet - Page 50

• Manufacturer Part Number: mcimx50
• Description: I.mx50 Applications Processors For Consumer Products
• Manufacturer: Freescale Semiconductor, Inc

Electrical Characteristics
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2
3
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GPMI’s Async Mode output timing could be controlled by module’s internal register, say
HW_GPMI_TIMING0_ADDRESS_SETUP, HW_GPMI_TIMING0_DATA_SETUP, and HW_GPMI_TIMING0_DATA_HOLD.
This AC timing depends on these registers’ setting. In the above table, we use AS/DS/DH representing these settings each.
T represents for the GPMI clock period.
AS minimum value could be 0, while DS/DH minimum value is 1.
NF10
NF11
NF12
NF13
NF14
NF15
NF16
NF17
NF5
NF6
NF7
NF8
NF9
ID
WE pulse width
ALE setup time
ALE hold time
Data setup time
Data hold time
Write cycle time
WE hold time
Ready to RE low
RE pulse width
READ cycle time
RE high hold time
Data setup on read
Data hold on read
Parameter
Table 37. Asynchronous Mode Timing Parameters
i.MX50 Applications Processors for Consumer Products, Rev. 0
Symbol
tREH
tDSR
tDHR
tALH
tALS
tWC
tWP
tWH
tDH
tRR
tRC
tDS
tRP
(DS+DH)*T
(DH+1)*T
T
(AS+1)*T
(AS+1)*T
2
DS*T
DH*T
DS*T
Min.
= GPMI Clock Cycle
(DS+DH)*T
Timing
DS*T
DH*T
DH*T
N/A
N/A
Max.
—
—
—
—
—
—
—
3
1
(continued)
GPMI Clock
Example Timing for
Min.
10
20
10
10
10
10
20
10
10
10
T = 10ns
10
20
10
Freescale Semiconductor
≈ 100
Max.
—
—
—
—
—
—
—
—
—
—
MHz
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns