Time Monitoring Feature; Figure 1.40 Switching Direction Of Transfer Over Data Bus - Fujitsu MBA3073 SERIES Technical Manual

1) The TARG negates the I/O signal.
2) The TARG releases the DB(15-0, P_CRCA and/or P1) within one System Deskew Delay.
3) The INIT detects the negation of the I/O signal.
4) The INIT asserts the DB(15-0, P_CRCA and/or P1) more than one System Deskew Delay.
f) The P_CRCA signal direction may switch direction while the DATA BUS and/or DB(P1)
does not (e.g., changing from COMMAND phase to DT DATA OUT phase).
•
When switching the P_CRCA signal direction from out (INIT driving) to in (TARG driving)
1) The TARG delays driving the P_CRCA by at least one Data Release Delay plus one
Bus Settle Delay after negating the C/D signal
2) The INIT releases the P_CRCA signal within one Data Release Delay after the
transition of the C/D signal to false.
•
When switching the P_CRCA signal direction from in (TARG driving) to out (INIT driving)
1) The TARG releases the P_CRCA signal within one System Deskew Delay after
asserting the C/D signal.
2) The INIT negates the P_CRCA signal more than one System Deskew Delay after the
detection of the assertion of the C/D signal.
g) The ATN and RST signals may change as defined under the descriptions for the attention
condition and hard reset.

Figure 1.40 Switching direction of transfer over data bus

1.6.11

Time monitoring feature

30 C141-C015