MB86615
(2) 68-Series DMA Read Operation
Parameter
DREQ “H” to DACK “L”
DS “H” to DREQ “L”
DACK setup time
DACK hold time
R/W setup time
R/W hold time
DS “L” level pulse width
DS “H” level pulse width
Data output definition time
Data output disabled time
Symbol
tDHAL
tDHDL
tDARS
tDARH
tDRWS
tDRWH
tDDS
tDDSH
tDRLD
tDRHD
Value
Unit
Min.
Max.
0
—
ns
—
30
ns
20
—
ns
0
—
ns
20
—
ns
10
—
ns
40
—
ns
30
—
ns
—
40
ns
5
—
ns
DREQ
DACK
R/W
DS
D15 to D6, D0
AD5 to AD1
tDHAL
tDARS
tDRWS
tDDS
tDDSH
tDRLD
tDRHD
Defined data
tDHDL
tDARH
tDRWH
Defined data
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