83C196KB Intel Corporation, 83C196KB Datasheet - Page 15

• Manufacturer Part Number: 83C196KB
• Description: COMMERCIAL/EXPRESS CHMOS MICROCONTROLLER
• Manufacturer: Intel Corporation

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
EXTERNAL CRYSTAL CONNECTIONS
AC TESTING INPUT OUTPUT WAVEFORMS
IH
NOTE
Keep oscillator components close to chip and use
short direct traces to XTAL1 XTAL2 and V
using crystals C1
ceramic resonators consult manufacturer for recom-
mended circuitry
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
1 T
1 T
T
T
T
T
T
T
Symbol
XLXL
XLXL
XHXX
XLXX
XLXH
XHXL
XLXL
XLXL
e
20 pF C2
Oscillator Frequency 12 MHz
Oscillator Frequency 16 MHz
Oscillator Period 12 MHz
Oscillator Period 16 MHz
High Time
Low Time
Rise Time
Fall Time
e
20 pF When using
Parameter
270909– 11
270909– 13
SS
When
EXTERNAL CLOCK CONNECTIONS
FLOAT WAVEFORMS
For Timing Purposes a Port Pin is no Longer Floating when a
200 mV change from Load Voltage Occurs and Begins to Float
when a 200 mV change from the Loaded V
I
OL
Not needed if CMOS driver is used
Required if open-collector TTL driver used
I
OH
e
21 25
21 25
83 3
62 5
Min
3 5
3 5
g
15 mA
8XC196KB 8XC196KB16
Max
12 0
286
286
16
10
10
270909 –10
OH
V
OL
270909 –12
270909 –14
Level occurs
Units
MHz
MHz
ns
ns
ns
ns
ns
ns
IL
and
15