at89c51re2-slsem ATMEL Corporation, at89c51re2-slsem Datasheet - Page 158

• Manufacturer Part Number: at89c51re2-slsem
• Description: At89c51re2 8-bit Flash Microcontroller
• Manufacturer: ATMEL Corporation

AC Testing Input/Output
Waveforms
Float Waveforms
Clock Waveforms
7663B–8051–03/07
AC inputs during testing are driven at V
Timing measurement are made at V
For timing purposes as 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
occurs. I
Valid in normal clock mode. In X2 mode XTAL2 must be changed to XTAL2/2.
INPUT/OUTPUT
OL
/I
OH
≥ ± 20 mA.
V
CC
V
V
OH
OL
0.45V
-0.5V
+ 0.1V
- 0.1V
IH
FLOAT
min for a logic “1” and V
V
CC
LOAD
- 0.5 for a logic “1” and 0.45V for a logic “0”.
0.2 V
0.2 V
CC
CC
+ 0.9
- 0.1
V
V
LOAD
LOAD
IL
+ 0.1V
- 0.1V
max for a logic “0”.
OH
/V
OL
level
141