Datasheet

 2017 Microchip Technology Inc. DS60001516A-page 749
SAM9G20
40.8 USB Transceiver Characteristics
Table 40-22: External Voltage Reference Input
Parameter Conditions Min Typ Max Unit
ADVREF Input Voltage Range 2.4 – VDDANA V
ADVREF Average Current – – 220 µA
Current Consumption on VDDANA – 300 620 µA
Table 40-23: Analog Inputs
Parameter Min Typ Max Unit
Input Voltage Range 0 – ADVREF V
Input Leakage Current – – 1 µA
Input Capacitance – 8 – pF
Table 40-24: USB Electrical Characteristics
Symbol Parameter Conditions Min Typ Max Unit
Input Levels
V
IL
Low Level ––0.8V
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
lkg
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 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
Measurement conditions described in
Figure 40-23
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 kΩ
R
PUA
Bus Pull-up Resistor on Upstream
Port (upstream port receiving)
1.425 – 3.090 kΩ
R
PD
Bus Pull-down resistor 14.25 – 24.8 kΩ