87C196(1998) データシートの表示（PDF） - Intel
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87C196 Datasheet PDF : 38 Pages
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87C196CA/87C196CB - Express
Table 7. AC Characteristics System Must Meet to Work with 87C196CA/87C196CB - Express
Symbol
Parameter
Min
Max
Units
TAVYV
TLLYV
TYLYH
TCLYX
TAVGV
TLLGV
TCLGX
TAVDV
Address Valid to Ready Setup
ALE Low to Ready Setup
Non Ready Time
READY Hold after CLKOUT Low
Address Valid to BUSWIDTH Setup
ALE Low to BUSWIDTH Setup
BUSWIDTH Hold after CLKOUT Low
Address Valid to Input Data Valid
20
250
No Upper Limit
0
TOSC–30
TOSC–75
TOSC–60
0
3TOSC–55
ns (3)
ns (3)
ns
ns (1)
ns (2,3)
ns (2,3)
ns
ns (2)
TRLDV
RD# Active to Input Data Value
CA
CB
TOSC–22
TOSC–30
ns (2)
TCLDV
CLKOUT Low to Input Data Valid
3TOSC–50
ns
TRHDZ
End of RD# to INput Data Valid
ns
TRHDX
Data Hold after RD# High
0
ns
NOTES:
1. Testing performed at 4 MHz, however, the device is static by design and typically operates below 1 Hz.
2. Typical specifications, not guaranteed.
3. Assuming back-to-back bus cycles.
4. 8-bit bus only.
5. If wait states are used, add 2TOSC x n = number of wait states. If mode 0 (1 automatic wait state added)
operation is selected, add 2TOSC to specification.
6. TOFD is the time for the oscillator fail detect circuit (OFD) to react to a clock failure. The OFD circuitry is
enabled by programming the UPROM location 0778H with the value 0004H. Programming the CDE bit
enables oscillator fail detection.
16
ADVANCE INFORMATION Datasheet
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