MCIMX31L FREESCALE [Freescale Semiconductor, Inc], MCIMX31L Datasheet - Page 83

• Manufacturer Part Number: MCIMX31L
• Description: Multimedia Applications Processors
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

4.3.9
This section provides electrical parametrics and timings for EMI module.
4.3.9.1
There are two modes of operations for the NFC—default and ONE_CYCLE.
Normal NFC mode—using two flash clock cycles for one access of RE and WE. AC parameters
calculation for this mode assume the flash clock cycle frequency is 22.5 MHz (as an example).
One-Cycle NFC mode—using one flash cycle for one access of RE and WE. AC parameters calculation
for this mode assume the flash clock cycle frequency that is 33.5 MHz (as an example).
4.3.9.1.1
The flash clock maximum frequency goes up to 50 MHz.
depict the relative timing requirements among different signals of the NFC at module level, for normal
mode, and
Freescale Semiconductor
Table 31
EMI Electrical Specifications
NAND Flash Controller Interface (NFC)
Normal NFC Mode (Default)
NFCE
NFIO[7:0]
NFCLE
NFWE
NFALE
lists the timing parameters.
Figure 21. Command Latch Cycle Timing DIagram
i.MX31/i.MX31L Advance Information, Rev. 1.4
NF6
NF3
NF1
Command
Preliminary
NF8
NF5
Figure
NF9
NF7
NF2
21,
Figure
NF4
22,
Figure
Electrical Characteristics
23, and
Figure 24
83