DS89C420_02 Datasheet, PDF (48/58 Pages) Maxim Integrated Products – Ultra-High-Speed Microcontroller

PARAMETER
ALE Low to RD or WR
Low
Port 0 Address Valid to
RD or WR Low
Port 2 Address Valid to
RD or WR Low
Data Out Valid to WR
Transition
SYMBOL
t LLRL
(t LLWL)
t AVRL0
(t AVWL0)
t AVRL2
(tAVWL2)
1 CYCLE
PAGE MODE 1
MIN
MAX
2 CYCLE
PAGE MODE 1
MIN
MAX
4 CYCLE
PAGE MODE 1
MIN
MAX
PAGE MODE 2
MIN
MAX
NON-PAGE MODE
MIN
MAX
0.5tCLCL - 8
+ tSTC2
0.5tCLCL + 1
+ tSTC2
2tCLCL - 8 +
t STC2
2tCLCL + 8 +
t STC2
4tCLCL - 8 +
t STC2
4tCLCL + 8 +
t STC2
0.5tCLC L - 8 +
t STC2
0.5tCLCL + 4
+ tSTC2
0.5tCLCL - 8 +
t STC2
0.5tCLCL + 4
+ tSTC2
1.5tCLCL - 5 +
t STC2
tCLCL - 5 +
t STC2
0 + tSTC5 - 5
0.5tCLCL - 5
+ tSTC5
1.5tCLCL - 5
+ tSTC5
tCLCL - 5 +
t STC5
1.5tCLCL - 5 +
t STC5
DS89C420
UNITS NOTES
ns
2
ns
2
ns
2
t QVWX
-5
-5
-5
-5
-5
ns
1
Data Hold After WR
tWHQX
20
20
20
20
20
ns
1
RD or WR High to ALE
tRHLH
High
t STC2 - 2
t STC2 + 6
t STC2 - 2
t STC2 + 6
t STC2 - 2
t STC2 + 6
t STC2 - 2
t STC2 + 6
t STC2 - 2
t STC2 + 6
ns
1
(tWHLH)
*Specifications to -40°C are guaranteed by design and not production tested.
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