AT83C51SND1C_03 ATMEL [ATMEL Corporation], AT83C51SND1C_03 Datasheet - Page 200

• Manufacturer Part Number: AT83C51SND1C_03
• Description: Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface
• Manufacturer: ATMEL [ATMEL Corporation]

200
AT8xC51SND1C
Figure 158. AC Testing Input/Output Waveforms
Note:
Figure 159. Float Waveforms
Note:
1. During AC testing, all inputs are driven at V
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
occurs with I
V
LOAD
logic 0.
a logic 0.
V
DD
0.45 V
- 0.5
V
V
LOAD
LOAD
OL
/I
+ 0.1 V
- 0.1 V
OH
= ±20 mA.
INPUTS
0.7 V
0.3 V
DD
DD
Timing Reference Points
DD
-0.5 V for a logic 1 and 0.45 V for a
IH
min for a logic 1 and V
V
V
OH
OL
V
V
IL
IH
+ 0.1 V
- 0.1 V
max
min
OUTPUTS
4109E–8051–06/03
OH
IL
/V
max for
OL
level