Datasheet

683
SAM9261 [DATASHEET]
Atmel-6062O-ATARM-SAM9261-Datasheet_21-Jun-16
38.6 USB Transceiver Characteristics
38.6.1 Electrical Characteristics
38.7 Core Power Supply POR Characteristics
Table 38-13. USB Transceiver 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
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 38-13
1.3 – 2.0 V
Pull-up Resistor
R
PUI
Bus Pull-up Resistor on Upstream Port
(idle bus)
– 0.900–1.575kΩ
R
PUA
Bus Pull-up Resistor on Upstream Port
(upstream port receiving)
– 1.425–3.090kΩ
Table 38-14. Power-On-Reset Characteristics
Symbol Parameter Conditions Min Typ Max Unit
V
T+
Threshold Voltage Rising Minimum Slope of 7.6V/ms 0.7 0.9 1.08 V
V
T-
Threshold Voltage Falling – 0.6 0.8 1.0 V
t
RST
Reset Time – 50 170 300 µs