AT89C1051-12PA ATMEL [ATMEL Corporation], AT89C1051-12PA Datasheet - Page 10

• Manufacturer Part Number: AT89C1051-12PA
• Description: 8-Bit Microcontroller with 1K Byte Flash
• Manufacturer: ATMEL [ATMEL Corporation]

External Clock Drive Waveforms
External Clock Drive
AC Testing Input/Output Waveforms
Note:
4-12
Symbol
1/t
t
t
t
t
t
CLCL
CHCX
CLCX
CLCH
CHCL
CLCL
1.
AC Inputs during testing are driven at V
logic 1 and 0.45V for a logic 0. Timing measurements
are made at V
logic 0.
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
AT89C1051
IH
min. for a logic 1 and V
CC
IL
83.3
Min
max. for a
30
30
V
- 0.5V for a
0
CC
(1)
= 2.7V to 6.0V
Float Waveforms
Note:
Max
12
20
20
1.
For timing purposes, a port pin is no longer float-
ing when a 100 mV change load voltage occurs. A
port pin begins to float when a 100 mV change
from the loaded V
41.6
Min
15
15
V
0
CC
= 4.0V to 6.0V
(1)
OH
/V
OL
Max
24
20
20
level occurs.
Units
MHz
ns
ns
ns
ns
ns