Figure 3-33. USBA Port Schematic
USBA_N
USBA_P
20pF
50V
0402
C194
20k
0402
1%
R188
GND
GND
USBA_VBUSDETECT_PD11
GND_USBA
USBA_VBUS_5V
0475890001
1
2
3
4
5
0
ID
D
+
D
-
+5
V
G
N
D
M
in
i-B
Re
ce
pt
ac
le
J7
USB Micro-AB type connector to the USBA port (HOST/DEVICE)
10k
0402
1%
R186
120R
BLM18PG121SN1D
FB10
DIFF90
DIFF90
0R
0603
R185
USB_VBUS_5V
GND
GND_USBA
90
Ω
±15% differential trace impedance
Routing top or bottom
Table 3-22. USBA J7 Connector Signal Descriptions
Pin No.
Signal Name
Signal Description
1
USBA_VBUS_5V
First port 5V power
2
USBA_N
First port data minus
3
USBA_P
First port data plus
4
ID
– (not used)
5
GND
First port ground
Table 3-23. USBA PIO Signal Description
PIO
Signal Name
Shared
Signal Description
PD11
USBA_VBUSDETECT_PD11
–
VBUS detection
In Host mode, the USB host port A is equipped with 500-mA high-side power switches to enable self-powered
and bus-powered applications. The USBA_EN_5V_PB2 signal controls the current limiting power switch MIC2025,
which in turn supplies power to a client device. As per the USB specification, bus-powered USB 2.0 devices are
limited to a maximum of 500 mA, therefore the MIC2025 limits the current and reports an overcurrent with the
USBA_OVCUR_PC7 signal. For more information about the MIC2025, refer to the product
.
Figure 3-34. USBA Port Power Switch Schematic
EN
1
FLG 2
GND
3
NC
4
NC 5
OUT 6
IN
7
OUT 8
USB Power Switch
MIC2025-1YM
U16
USBA_VBUS_5V
USBA_OVCUR_PC7
USBA_EN_5V_PB2
5V_MAIN
VDD_3V3
GND
GND
GND
10uF
25V
1206
C195
10uF
25V
1206
C197
0.1uF
10V
0402
C198
100uF
10V
1210
C200
22uF
10V
1206
C199
0.1uF
10V
0402
C196
10k
0402
1%
R189
10k
0402
1%
R187
120R
BLM18PG121SN1D
FB9
SAMA7G54-EK
Function Blocks
©
2022 Microchip Technology Inc.
and its subsidiaries
User Guide
DS50003273A-page 44