mcimx27- Freescale Semiconductor, Inc, mcimx27- Datasheet - Page 70

• Manufacturer Part Number: mcimx27-
• Description: Multimedia Applications Processor
• Manufacturer: Freescale Semiconductor, Inc

Signal Descriptions
3.6.8
Figure 35
of one clock of strobe setup time and one clock of strobe hold time.
70
NF10 Write Cycle Time
NF11 NFWE Hold Time
NF12 Ready to NFRE Low
NF13 NFRE Pulse Width
NF14 READ Cycle Time
NF15 NFRE High Hold Time
NF16 Data Setup on READ
NF17 Data Hold on READ
NF5 NF_WP Pulse Width
NF6 NFALE Setup Time
NF7 NFALE Hold Time
NF8 Data Setup Time
NF9 Data Hold Time
and
ID
Personal Computer Memory Card International Association
(PCMCIA)
Figure 36
High is defined as 80% of signal value and low is defined as 20% of signal
value. All timings are listed according to this NFC clock frequency
(multiples of NFC clock period) except NF16, which is not NFC clock
related.
The read data is generated by the NAND Flash device and sampled with the
internal NFC clock.
Parameter
show the timings pertaining to the PCMCIA module, each of which is an example
Table 35. NFC Target Timing Parameters (continued)
Preliminary—Subject to Change Without Notice
i.MX27 and i.MX27L Data Sheet, Rev. 1.2
Symbol
tREH
tDSR
tDHR
tALH
tALS
tWP
tWC
tWH
tDH
tRR
tRC
tDS
tRP
Relationship to
1.5T
0.5T
Min
2T
4T
2T
15
NFC clock
T
T
T
T
T
T
0
period (T)
NOTE
Max
—
—
—
—
—
—
—
—
—
—
—
—
—
NFC clock 22.17
67.5
22.5
Min
180
45
45
45
45
45
90
45
90
15
0
T = 45 ns
MHz
Table 36
Max
—
—
—
—
—
—
—
—
—
—
—
—
—
Min
120
lists the timing parameters.
30
30
30
30
30
60
30
45
60
15
15
0
NFC clock
33.25 MHz
T = 30 ns
Freescale Semiconductor
Max
—
—
—
—
—
—
—
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns