MB90495 Series
14.8 External Bus Hold Timing
Parameter
Symbol
Pin floating ⇒ HAK ↓ time
HAK ↑ time ⇒ Pin valid time
tXHAL
tHAHV
Pin
HAK
HAK
Test Condition
—
(TA = –40 to +85°C, VCC = 4.5 to 5.5 V, VSS = 0 V)
Rated Value
Min.
Max.
Units Remarks
30
tCP
ns
tCP
2 tCP
ns
Note: There is more than 1 cycle from when HRQ reads in until the HAK is changed.
HAK
Each pin
0.8V
tXHAL
2.4V
0.8V
High impedance
2.4V
tHAHV
2.4V
0.8V
Figure 14.9 Hold Timing
MB90495 Series Data Sheet (Advance Information) 32 / 40
FMG EMDC June 19, 2000