Datasheet

124
4235K–8051–05/08
AT89C51RD2/ED2
25.3.11 Float Waveforms
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
OH
/V
OL
level occurs. I
OL
/I
OH
≥ ± 20 mA.
25.3.12 Clock Waveforms
Valid in normal clock mode. In X2 mode XTAL2 must be changed to XTAL2/2.
FLOAT
V
OH
- 0.1V
V
OL
+ 0.1V
V
LOAD
V
LOAD
+ 0.1V
V
LOAD
- 0.1V