Datasheet

572
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
37.8 USB Transceiver Characteristics
37.8.1 Electrical Characteristics
37.8.2 Switching Characteristics
Table 37-16. Electrical Parameters
Symbol Parameter Conditions Min Typ Max Unit
Input Levels
V
IL
Low Level 0.8 V
V
IH
High Level 2.0 V
V
DI
Differential Input Sensitivity |(D+) - (D-)| 0.2 V
V
CM
Differential Input Common
Mode Range
0.8 2.5 V
C
IN
Transceiver capacitance Capacitance to ground on each line 9.18 pF
I Hi-Z State Data Line Leakage 0V < V
IN
< 3.3V -10 +10 µA
R
EXT
Recommended External USB
Series Resistor
In series with each USB pin with ±5% 27 Ω
Output Levels
V
OL
Low Level Output
Measured with R
L
of 1.425 kOhm tied
to 3.6V
0.0 0.3 V
V
OH
High Level Output
Measured with R
L
of 14.25 kOhm tied
to GND
2.8 3.6 V
V
CRS
Output Signal Crossover
Voltage
Measure conditions described in
Figure 37-3
1.3 2.0 V
Consumption
I
VDDIO
Current Consumption
Transceiver enabled in input mode
DDP=1 and DDM=0
105 200 µA
I
VDDCORE
Current Consumption 80 150 µA
Table 37-17. In Full Speed
Symbol Parameter Conditions Min Typ Max Unit
t
FR
Transition Rise Time C
LOAD
= 50 pF 4 20 ns
t
FE
Transition Fall Time C
LOAD
= 50 pF 4 20 ns
t
FRFM
Rise/Fall time Matching 90 111.11 %