Remote DMA (Write Cycle) Recovery Time

TLF10469 – 44

Symbol

Parameter

Min

Max

Units

bprqh

Bus Clock to Port Request High (Note 1)

42

ns

wprql

WACK to Port Request Low

50

ns

wackw

WACK Pulse Width

25

ns

bprdl

Bus Clock to Port Read Low (Note 2)

55

ns

bprdh

Bus Clock to Port Read High

40

ns

wprq

Remote Write Port Request to Port

12

BSCK

Request Time (Notes 3 4 5)

Note 1

The first port request is issued in response to the remote write command It is subsequently issued on T1 clock cycles following completion of remote

DMA cycles

Note 2

The start of the remote DMA write following WACK is dependent on where WACK is issued relative to BSCK and whether a local DMA is pending

Note 3

Note 4

WACK must be high for a minimum of 7 BSCK

Note 5

This is not a measured value but guaranteed by design

60