DMA TIMING

(Note 1)

Symbol

Parameter

Min

Max

Units

DAK Pulse Width

60

ns

End of DRQ from DAK

92

ns

DAK Assertion from DRQ

8

ns

DRQ to Read or Write Strobe

8

ns

Time after Last DRQ That

(Note 2)

TC Must Be Asserted By

TC Strobe Width

40

ns

Note 1

DMA Acknowledge is sufficient to acknowledge a data transfer Read or Write Strobes are neccessary only if data is to be presented to the data bus If

ReadWrite Strobes are applied then they and the Acknowledge must be removed within 1 ms of each other

Note 2

TC is is the terminal count pin which terminates the data transfer operation There are several constraints placed on the timing of TC 1) TC is enabled by

TLC10591 – 28

DRIVE READ TIMING

Symbol

Parameter

Min

Max

Units

Read Data Pulse Width

25

ns

TLC10591 – 29

49