GL811USB Просмотр технического описания (PDF) - Genesys Logic

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GL811USB

USB 2.0 to ATA / ATAPI Bridge Controller

Genesys Logic 

GL811USB – USB 2.0 to ATA / ATAPI Bridge Controller

6.4.2.3 Device terminating a Multiword DMA data burst

CS0_/ CS1_

DMARQ

(Note)

DMACK_

DIOR_/DIOW_

Read DD(15:0)

Write DD(15:0)

t0

tL

tK

tD

tE

tN

tJ

tZ

tG

tF

tG

tH

Note:

To terminate the data burst, the Device shall negate DMARQ within the tL of the assertion of the

current DIOR_ or DIOW_ pulse. The last data word for the burst shall then be transferred by the

negation of the current DIOR_ or DIOW_ pulse. If all data for the command has not been

transferred, the device shall reassert DMARQ again at any later time to resume the DMA

operation.

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