AT89C51SND1C-ROTIL ATMEL Corporation, AT89C51SND1C-ROTIL Datasheet - Page 43

• Manufacturer Part Number: AT89C51SND1C-ROTIL
• Description: Single-Chip Microcontroller with MP3 Decoder and Man-Machine Interface
• Manufacturer: ATMEL Corporation

Figure 31. AC Testing Input/Output Waveforms
Notes:
Figure 32. Float Waveforms
Note:
4106F–8051–10/02
1. During AC testing, all inputs are driven at
2. Timing measurements are made on all outputs at V
For timing purposes, a 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 loading V
DD
0.45 V
V
- 0.5
LOAD
V
V
LOAD
LOAD
INPUTS
OH
+ 0.1 V
- 0.1 V
/V
0.7
0.3
OL
V
V
level occurs with I
DD
DD
V
DD
-0.5V for a logic 1 and 0.45V for a logic 0.
Timing Reference Points
IH
min for a logic 1 and V
OL
/I
OH
= ±20 mA.
V
V
IL
IH
IL
max
min
max for a logic 0.
OUTPUTS
V
V
OH
OL
+ 0.1 V
- 0.1 V
AT8xC51SND1C
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