87C196KC Intel Corporation, 87C196KC Datasheet - Page 14

• Manufacturer Part Number: 87C196KC
• Description: 16-BIT HIGH PERFORMANCE CHMOS MICROCONTROLLER
• Manufacturer: Intel Corporation

AUTOMOTIVE 87C196KC
EXTERNAL CLOCK DRIVE
EXTERNAL CLOCK DRIVE WAVEFORMS
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
V
AC TESTING INPUT OUTPUT WAVEFORMS
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
L
V
X
Z
14
IH
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’’
specifications the capacitance will not exceed 20 pF
High
Low
Valid
No Longer Valid
Floating
1 T
T
T
T
T
T
Symbol
XLXL
XHXX
XLXX
XLXH
XHXL
XLXL
Oscillator Frequency
Oscillator Frequency
High Time
Low Time
Rise Time
Fall Time
Parameter
Signals
A
B
C
D
G
H
HA
270846– 27
Address
BHE
CLKOUT
DATA
Buswidth
HOLD
HLDA
FLOAT WAVEFORMS
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
I
OL
62 5
I
Min
OH
4 0
22
22
e
g
15 mA
L
BR
R
W
X
Y
Q
Max
16 0
250
10
10
ALE ADV
BREQ
RD
WR WRH WRL
XTAL1
READY
Data Out
270846 –26
OH
V
OL
Units
270846 –28
MHz
Level occurs
ns
ns
ns
ns
ns
IL
and