8242 데이터 시트보기 (PDF) - Intel
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8242 Datasheet PDF : 20 Pages
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UPI-41AH 42AH
A C CHARACTERISTICS TA e 0 C to a70 C VSS e 0V VCC e VDD e a5V g10%
DBB READ
Symbol
Parameter
Min
Max
Units
tAR
v CS A0 Setup to RD
0
ns
tRA
u CS A0 Hold After RD
0
ns
tRR
RD Pulse Width
160
ns
tAD
CS A0 to Data Out Delay
130
ns
tRD
v RD to Data Out Delay
0
130
ns
tDF
u RD to Data Float Delay
85
ns
DBB WRITE
Symbol
Parameter
Min
Max
Units
tAW
v CS A0 Setup to WR
0
ns
tWA
u CS A0 Hold After WR
0
ns
tWW
WR Pulse Width
160
ns
tDW
u Data Setup to WR
130
ns
tWD
u Data Hold After WR
0
ns
CLOCK
Symbol
Parameter
Min
Max
Units
tCY (UPI-41AH 42AH)
Cycle Time
12
9 20
ms(1)
tCYC (UPI-41AH 42AH)
Clock Period
80
613
ns
tPWH
Clock High Time
30
ns
tPWL
Clock Low Time
30
ns
tR
Clock Rise Time
10
ns
tF
Clock Fall Time
10
ns
NOTE
1 tCY e 15 f(XTAL)
A C CHARACTERISTICS DMA
Symbol
Parameter
Min
Max
Units
tACC
tCAC
tACD
tCRQ
DACK to WR or RD
0
ns
RD or WR to DACK
0
ns
DACK to Data ValidDACK to Data Valid
0
130
ns
RD or WR to DRQ Cleared
110
ns(1)
NOTE
1 CL e 150 pF
13
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