AT91SAM9G20_14 Datasheet, PDF (775/832 Pages) ATMEL Corporation – Incorporates the ARM926EJ-S ARM Thumb Processor

AT91SAM9G20
41.7 USB Transceiver Characteristics
41.7.1 Electrical Characteristics
Table 41-23. Electrical Parameters
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Input Levels
V_IL
Low Level
V_IH
High Level
V_DI
Differential Input Sensitivity
|(D+) - (D-)|
V_CM
Differential Input Common
Mode Range
0.8
V
2.0
V
0.2
V
0.8
2.5
V
C_IN
I
R_EXT
Transceiver capacitance
Capacitance to ground on each line
9.18
pF
Hi-Z State Data Line Leakage 0V < V_IN < 3.3V
- 10
+ 10
µA
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 kΩ tied to
3.6V
0.0
0.3
V
V_OH
High Level Output
Measured with R_L of 14.25 kΩ tied to
GND
2.8
3.6
V
V_CRS
Output Signal Crossover
Voltage
Measure conditions described in
Figure 41-23
1.3
2.0
V
Pull-up and Pull-down Resistor
R_PUI
Bus Pull-up Resistor on
Upstream Port (idle bus)
0.900
1.575 kOhm
R_PUA
Bus Pull-up Resistor on
Upstream Port (upstream port
receiving)
1.425
3.090 kOhm
R_PD
Bus Pull-down resistor
14.25
24.8 kOhm
6384E–ATARM–05-Feb-10
775