DP8390DV datasheet(51/56 Pages) NSC

51 / 56 page

150 Switching Characteristics (Continued)

Remote DMA (Write Cycle) Recovery Time

TLF8582 – 87

Symbol

Parameter

Min

Max

Units

bprqh

Bus Clock to Port Request High

(Note 1)

wprql

WACK to Port Request Low

wackw

WACK Pulse Width

bprdl

Bus Clock to Port Read Low

(Note 2)

bprdh

Bus Clock to Port Read High

wprq

Remote Write Port Request

to Port Request Time

BUSCK

(Notes 345)

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 BUSCK and whether a local DMA is pending

Note 3

Assuming wackw k 1 BUSCK and no local DMA interleave no CS immediate BACK and WACK goes high before T4

Note 4

WACK must be high for a minimum of 7 BUSCK

Note 5

This is not a measured value but guaranteed by design

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