AN87C196KDF8 Datasheet, PDF (14/21 Pages) Intel Corporation – 16-BIT HIGH PERFORMANCE CHMOS MICROCONTROLLER

AUTOMOTIVE 87C196KD
EXTERNAL CLOCK DRIVE
Symbol
Parameter
Min
Max
Units
1 T_XLXL
T_XLXL
T_XHXX
T_XLXX
T_XLXH
T_XHXL
Oscillator Frequency
Oscillator Frequency
High Time
Low Time
Rise Time
Fall Time
40
62 5
22
22
16 0
250
10
10
MHz
ns
ns
ns
ns
ns
EXTERNAL CLOCK DRIVE WAVEFORMS
272168 – 9
An external oscillator may encounter as much as a 100 pF load at XTAL1 when it starts-up This is due to
interaction between the amplifier and its feedback capacitance Once the external signal meets the V_IL and
V_IH specifications the capacitance will not exceed 20 pF
AC TESTING INPUT OUTPUT WAVEFORMS
FLOAT WAVEFORMS
272168 – 10
AC Testing inputs are driven at 2 4V for a Logic ‘‘1’’ and 0 45V for
a Logic ‘‘0’’ Timing measurements are made at 2 0V for a Logic
‘‘1’’ and 0 8V for a Logic ‘‘0’’
272168 – 11
For timing purposes a port pin is no longer floating when a
100 mV change from load voltage occurs and begins to float
when a 100 mV change from the loaded V_OH V_OL level occurs
I_OL I_OH e g15 mA
EXPLANATION OF AC SYMBOLS
Each symbol is two pairs of letters prefixed by ‘‘T’’ for time The characters in a pair indicate a signal and its
condition respectively Symbols represent the time between the two signal condition points
Conditions
H High
L Low
V Valid
X No Longer Valid
Z Floating
Signals
A Address
B BHE
C CLKOUT
D DATA
G Buswidth
H HOLD
HA HLDA
L ALE ADV
BR BREQ
R RD
W WR WRH WRL
X XTAL1
Y READY
Q Data Out
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