Renesas 7700 FAMILY User Manual page 528

APPENDIX
Appendix 9. Q & A
Hold function
Q
______
When "L" level is input to the HOLD pin, how long is the bus actually opened ?
A
The bus is opened after 50 ns at maximum has passed from the rising edge of next clock φ
when
1
____
the HLDA pin output becomes "L" level.
Clock
.......
1
HOLD
HLDA
Term where bus is open
t
: Maximum 50 ns
pxz(HOLD-PZ)
7751 Group User's Manual 20–77