PCIMX258CJM4A datasheet(44/144 Pages) FREESCALE

44 / 144 page

i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 3

Freescale Semiconductor

Table 33. Timing Parameters

Name

Description

Value/Contributing Factor

Bus clock period

Peripheral clock frequency

ti_ds

Set-up time ata_data to ata_iordy edge (UDMA-in only)

UDMA0

UDMA1

UDMA2,UDMA3

UDMA4

UDMA5

15 ns

10 ns

7ns

5ns

4ns

ti_dh

Hold time ata_iordy edge to ata_data (UDMA-in only)

UDMA0,UDMA1,UDMA2,UDMA3,UDMA4

UDMA5

5.0 ns

4.6 ns

tco

Propagation delay bus clock L-to-H to

ata_cs0, ata_cs1, ata_da2, ata_da1, ata_da0, ata_dior, ata_diow, ata_dmack,

ata_data, ata_buffer_en

12.0 ns

tsu

Set-up time ata_data to bus clock L-to-H

8.5 ns

tsui

Set-up time ata_iordy to bus clock H-to-L

8.5 ns

thi

Hold time ata_iordy to bus clock H-to-L

2.5 ns

tskew1

Maximum difference in propagation delay bus clock L-to-H to any of the

following signals

ata_cs0, ata_cs1, ata_da2, ata_da1, ata_da0, ata_dior, ata_diow,

ata_dmack, ata_data (write), ata_buffer_en

7ns

tskew2

Maximum difference in buffer propagation delay for any of the following signals

ata_cs0, ata_cs1, ata_da2, ata_da1, ata_da0, ata_dior, ata_diow,

ata_dmack, ata_data (write), ata_buffer_en

Transceiver

tskew3

Maximum difference in buffer propagation delay for any of the following signals

ata_iordy, ata_data (read)

Transceiver

tbuf

Maximum buffer propagation delay

Transceiver

tcable1

cable propagation delay for ata_data

Cable

tcable2

cable propagation delay for control signals ata_dior, ata_diow, ata_iordy,

ata_dmack

Cable

tskew4

Maximum difference in cable propagation delay between ata_iordy and

ata_data (read)

Cable

tskew5

Maximum difference in cable propagation delay between (ata_dior, ata_diow,

ata_dmack) and ata_cs0, ata_cs1, ata_da2, ata_da1, ata_da0,

ata_data(write)

Cable

tskew6

Maximum difference in cable propagation delay without accounting for ground

bounce

Cable

PCIMX258CJM4A Datasheet(PDF) 44 Page - Freescale Semiconductor, Inc

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