DS89C420_05 Datasheet, PDF (6/47 Pages) Maxim Integrated Products – Ultra-High-Speed Microcontroller

DS89C420 Ultra-High-Speed Microcontroller
PARAMETER
SYMBOL
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
UNITS
Port 2 Address to Valid
Data In (Note 2)
tAVDV2
tCLCL - 16 +
tSTC1
1.5tCLCL -
16 + tSTC1
3.5tCLCL -
16 + tSTC1
3.0tCLCL -
16 + tSTC1
3.5tCLCL -
20 + tSTC1
ns
ALE Low to RD or WR Low
(Note 2)
tLLRL
(tLLWL)
0.5tCLCL - 8 0.5tCLCL + 1 2tCLCL - 8 + 2tCLCL + 8 + 4tCLCL - 8 + 4tCLCL + 8 + 0.5tCLCL - 8 + 0.5tCLCL + 4 0.5tCLCL - 8 + 0.5tCLCL + 4
+ tSTC2
+ tSTC2
tSTC2
tSTC2
tSTC2
tSTC2
tSTC2
+ tSTC2
tSTC2
+ tSTC2
ns
Port 0 Address Valid to RD
or WR Low (Note 2)
tAVRL0
(tAVWL0)
1.5tCLCL - 5 +
tSTC2
tCLCL - 5 +
tSTC2
ns
Port 2 Address Valid to RD
or WR Low (Note 2)
tAVRL2
(tAVWL2)
0 + tSTC5 - 5
0.5tCLCL - 5
+ tSTC5
1.5tCLCL - 5
+ tSTC5
tCLCL - 5 +
tSTC5
1.5tCLCL - 5 +
tSTC5
ns
Data Out Valid to WR
Transition (Note 1)
tQVWX
-5
-5
-5
-5
-5
ns
Data Hold After WR
(Note 1)
tWHQX
20
20
20
20
20
ns
RD or WR High to ALE High
(Note 1)
tRHLH
(tWHLH)
tSTC2 - 2
tSTC2 + 6
tSTC2 - 2
tSTC2 + 6
tSTC2 - 2
tSTC2 + 6
tSTC2 - 2
tSTC2 + 6
tSTC2 - 2
tSTC2 + 6
ns
*Specifications to -40°C are guaranteed by design and not production tested.
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