AN87C196CA18 データシートの表示（PDF） - Intel
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AN87C196CA18 Datasheet PDF : 30 Pages
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Automotive — 87C196CA 18 MHz Microcontroller
4.4
AC Characteristics
Table 6.
AC Characteristics (Sheet 1 of 2)
(over specified operating conditions); Test conditions: capacitance load on all pins = 100 pF, Rise
and fall times = 10 ns, FOSC = 18 MHz
Symbol
Parameter
Min
Max
Units
The system must meet these specifications to work with the 87C196CA Microcontroller.
TAVYV
TLLYV
TYLYH
TCLYX
TLLYX
TAVDV
TRLDV
TCLDV
TRHDZ
TRXDX
Address Valid to READY Setup
ALE Low to READY Setup
Non Ready Time
READY Hold after CLKOUT Low
READY Hold after ALE Low
Address Valid to Input Data Valid
RD# Active to Input Data Valid
CLKOUT Low to Input Data Valid
End of RD# to Input Data Float
Data Hold after RD# Inactive
The 87C196CA Microcontroller meets these specifications.
2 TOSC – 75
TOSC – 70
No Upper Limit
0
TOSC – 15
0
TOSC – 30
2 TOSC – 40
3 TOSC – 55
TOSC – 22
TOSC – 50
TOSC
ns
ns
ns
ns(1)
ns(1)
ns
ns
ns
ns
ns
FXTAL
Oscillator Frequency
4
18
MHz(2)
TOSC
TXHCH
TOFD
Oscillator Period (1/FXTAL)
XTAL1 High to CLKOUT High or Low
Clock Failure to Reset Pulled Low
55
250
ns
20
110
ns(3)
4
40
µS(7)
TCLCL
CLKOUT Period
2 TOSC
ns
TCHCL CLKOUT High Period
TOSC – 10
TOSC + 15
ns
TCLLH CLKOUT Falling Edge to ALE Rising
–15
10
ns
TLLCH ALE/ADV# Falling Edge to CLKOUT Rising
–20
15
ns
TLHLH
ALE/ADV# Cycle Time
4 TOSC
ns
TLHLL
ALE/ADV# High Period
TOSC – 10
TOSC + 10
ns
TAVLL
Address Setup to ALE/ADV# Falling Edge
TOSC – 15
ns
TLLAX
Address Hold after ALE/ADV# Falling Edge
TOSC – 40
ns
TLLRL
ALE/ADV# Falling Edge to RD# Falling Edge
TOSC – 30
ns
TRLCL
RD# Low to CLKOUT Falling Edge
4
30
ns
TRLRH RD# Low Period
TOSC – 10
ns
NOTES:
1. If max is exceeded, additional wait states will occur.
2. Testing performed at 4 MHz; however, the device is static by design and will typically operate below 1 Hz.
3. Typical specifications, not guaranteed.
4. Assuming back-to-back bus cycles.
5. 8-bit bus only.
6. TRLAZ (max) = 5 ns by design.
7. TOFD is the time for the oscillator fail detect circuit (OFD) to react to a clock failure.
Datasheet
11
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