IMX53CEC datasheet(49/204 Pages) FREESCALE

Part #	IMX53CEC

Description	Applications Processors for Consumer Products

PDF	204 Pages

Scroll/Zoom	100%

Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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49 / 204 page

Electrical Characteristics

i.MX53xD Applications Processors for Consumer Products, Rev. 2

Freescale Semiconductor

Lower frequency operation can be supported for most available devices in

the market, relying on data lines Bus-Keeper logic. This depends on device

behavior on the data bus in the time interval between data output valid to

data output high-Z state. In NAND device parameters this period is marked

between trhoh and trhz (RE_B high to output high-Z). In most devices, the

data transition from valid value to high-Z occurs without going through

other states. Setting the data bus pads to Bus-Keeper mode in the IOMUXC

registers, keeps the data bus valid internally after the specified hold time,

allowing proper capturing with slower clock.

Figure 10. Command Latch Cycle Timing

Figure 11. Address Latch Cycle Timing

NFCLE

NFCE_B

NFWE_B

NFIO[7:0]

command

NF9

NF8

NF1

NF2

NF5

NF3

NF4

NFCE_B

NFWE_B

NFALE

NFIO[7:0]

Address

NF9

NF8

NF5

NF3

NF4

NF6

NF11

NF10

NF7

IMX53CEC Datasheet(PDF) 49 Page - Freescale Semiconductor, Inc