tn87c196kd20 ETC-unknow, tn87c196kd20 Datasheet - Page 18

• Manufacturer Part Number: tn87c196kd20
• Description: Commercial Chmos Microcontroller
• Manufacturer: ETC-unknow

8XC196KD/8XC196KD20
EXTERNAL CRYSTAL CONNECTIONS
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 - High
L -
V - Valid
X - No Longer Valid
Z - Floating
18
NOTE:
Keep oscillator components close to chip and use
short, direct traces to XTAL1, XTAL2 and V
using ceramic crystals, C1
When using ceramic resonators consult manufacturer
for recommended capacitor values.
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''.
Low
e
20 pF, C2
Signals:
A -
B -
C -
D -
G -
H -
HA - HLDA
272145 ±13
272145 ±11
e
SS
Address
BHE
CLKOUT
DATA
Buswidth
HOLD
. When
20 pF.
EXTERNAL CLOCK CONNECTIONS
FLOAT WAVEFORMS
NOTE:
For Timing Purposes a Port Pin is no Longer Floating when a
150 mV change from Load Voltage Occurs, and Begins to Float
when a 150 mV change from the Loaded V
I
OL
Required if TTL driver used.
Not needed if CMOS driver is used.
/I
OH
e
g
15 mA.
L -
BR - BREQ
R -
W - WR/WRH /WRL
X -
Y -
Q -
ALE/ADV
RD
XTAL1
READY
Data Out
OH
/V
OL
272145 ±14
272145 ±12
Level occurs;