Motorola MVME2400 - Manual (Page 66)

3-18 Computer Group Literature Center Web Site
Functional Description
3
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.