Motorola MVME2400 Series Servisní příručka stáhnout pdf (Strana 66)

3-18 Computer Group Literature Center Web Site

Functional Description

Notes When the initial bus state is idle, tB1 reflects the number of

CLK periods from the rising edge of the CLK that drives

TS_low, to the rising edge of the CLK that samples the first

TA_low.

When the bus is busy and TS_ is being asserted as soon as

possible after Hawk asserts AACK_ the back-to-back

condition occurs. When back-to-back cycles occur, tB1

reflects the number of CLK periods from the rising edge of

the CLK that samples the last TA_ low of a data tenure to the

rising edge of the CLK that samples the first TA_ low of the

next data tenure.

The tB2 function reflects the number of CLK periods from

the rising edge of the CLK that samples the first TA_ low in

a burst data tenure to the rising edge of the CLK that samples

the second TA_ low in that data tenure.

The tB3 function reflects the number of CLK periods from

the rising edge of the CLK that samples the second TA_ low

in a burst data tenure to the rising edge of the CLK that

samples the third TA_ low in that data tenure.

The tB4 function reflects the number of CLK periods from

the rising edge of the CLK that samples the third TA_ low in

a burst data tenure to the rising edge of the CLK that samples

the last TA_ low in that data tenure.

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Motorola MVME2400 Series Servisní příručka Strana 66