Specifications

Specifications
MDRQT
MDACK*
IORD* OR
IOWRT*
t22
t20
t21
Symbol Parameter Min Max
t20 DMA acknowledge setup to read or write low 25
t21 DMA acknowledge hold from read or write high 30
t22 DMA request hold from read or write low 150
All times given in nanoseconds
Figure B–13. SBX Expansion Module DMA Timing.
MCLK
t15 t16
Symbol Parameter Min Max
t15 Standard clock period 100 110
V40 synchronous clock period 125
t16 Standard clock period high width 35 75
V40 synchronous clock high width 55
All times given in nanoseconds
Figure B–14. SBX Expansion Module Clock Timing.
B-24