limited to a maximum of 500 mA, therefore the MIC2025 limits the current and indicates an overcurrent with the
USBB_OVCUR_PC22 signal.
Figure 3-36. USB-B 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
U17
USBB_VBUS_5V
USBB_OVCUR_PC22
USBB_EN_5V_PC11
5V_MAIN
VDD_3V3
GND
GND
10uF
25V
1206
C202
10uF
25V
1206
C204
GND
100uF
10V
1210
C207
22uF
10V
1206
C206
0.1uF
10V
0402
C203
0.1uF
10V
0402
C205
10k
0402
1%
R194
10k
0402
1%
R190
120R
BLM18PG121SN1D
FB11
Table 3-27. USB-B Power Switch PIO Signal Descriptions
PIO
Signal Name
Shared
Signal Description
PC11
USBB_EN_5V_PC11
–
Power switch enable (active high)
PC22
USBB_OVCUR_PC22
–
Indicates overcurrent (open drain)
3.4.2.3
USBC Host Interface
The USBC port can act as a USB device only and can be accessed via the USB Type-A connector (J9).
Figure 3-37. USBC Port Schematic
GND_USBC
USBC_VBUS_5V
VBUS 1
GND 4
D- 2
D+ 3
0
US
B2
.0
ST
D-
A
FE
M
AL
E
J9
USBC_N
USBC_P
USB-A type connector the USBC port (HOST)
GND
120R
BLM18PG121SN1D
FB14
DIFF90
DIFF90
90
Ω
±15% differential trace impedance
Routing top or bottom
Table 3-28. USBC J9 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
GND
First port ground
In Host mode, the USB host port C is equipped with 500-mA high-side power switches to enable self-powered
and bus-powered applications. The USBC_EN_5V_PC6 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
SAMA7G54-EK
Function Blocks
©
2022 Microchip Technology Inc.
and its subsidiaries
User Guide
DS50003273A-page 46