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| SAM7X128_14 Datasheet, PDF (590/662 Pages) ATMEL Corporation – ARM-based Flash MCU | |||
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38.6 USB Transceiver Characteristics
38.6.1 Electrical Characteristics
Table 38-13. Electrical Parameters
Symbol
Parameter
Conditions
Min
Input Levels
VIL
Low Level
VIH
High Level
2.0
VDI
Differential Input Sensitivity
|(D+) - (D-)|
0.2
VCM
Differential Input Common
Mode Range
0.8
CIN
Transceiver capacitance
Capacitance to ground on each line
I
Hi-Z State Data Line Leakage
0V < VIN < 3.3V
-10
REXT
Recommended External USB
Series Resistor
In series with each USB pin with ±5%
Output Levels
VOL
Low Level Output
Measured with RL of 1.425 kOhm tied
to 3.6V
0.0
VOH
High Level Output
Measured with RL of 14.25 kOhm tied
to GND
2.8
VCRS
Output Signal Crossover
Voltage
Measure conditions described in
Figure 38-3
1.3
Consumption
IVDDIO
IVDDCORE
Current Consumption
Current Consumption
Transceiver enabled in input mode
DDP=1 and DDM=0
38.6.2 Switching Characteristics
Table 38-14. In Full Speed
Symbol
Parameter
Conditions
Min
tFR
Transition Rise Time
CLOAD = 50 pF
4
tFE
Transition Fall Time
CLOAD = 50 pF
4
tFRFM
Rise/Fall time Matching
90
Typ
Max
Unit
0.8
V
V
V
2.5
V
9.18
pF
+10
µA
27
Ω
0.3
V
3.6
V
2.0
V
105
200
µA
80
150
µA
Typ
Max
Unit
20
ns
20
ns
111.11
%
SAM7X Series [DATASHEET]
6120KâATARMâ11-Feb-14
590
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