PCIMX515CJM6C datasheet(106/184 Pages) FREESCALE

106 / 184 page

i.MX51 Applications Processors for Consumer and Industrial Products, Rev. 1

106

Freescale Semiconductor

Preliminary—Subject to Change Without Notice

Electrical Characteristics

In the timing equations, some timing parameters are used. These parameters depend on the

implementation of the i.MX51 P-ATA interface on silicon, the bus buffer used, the cable delay and cable

skew. Table 78 shows ATA timing parameters.

Table 78. P-ATA Timing Parameters

Name

Description

Value/

Contributing Factor1

1 Values provided where applicable.

Bus clock period (ipg_clk_ata)

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

7 ns

5 ns

4 ns

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

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

Max difference in buffer propagation delay for any of 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

Max difference in buffer propagation delay for any of following signals ata_iordy,

ata_data (read)

Transceiver

tbuf

Max 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

Max difference in cable propagation delay between ata_iordy and ata_data (read)

Cable

tskew5

Max 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

Max difference in cable propagation delay without accounting for ground bounce

Cable

PCIMX515CJM6C Datasheet(PDF) 106 Page - Freescale Semiconductor, Inc

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