Hardware Manual: emSTAMP- emSBC-Argon (Rev1)
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6.5
USB 2.0 HOST
The USB Host interface of the CPU board is connected to the USB Type-A connector J12. The used
EMC filters are dimensioned for High Speed Mode with 480 MHz.
The VBUS output of the USB Host connector is provided by PMIC of the emSBC-Argon module. The
VBUS supply voltage USBH_VBUS is available at pin 52 of the module and can provide up to 5W.
6.5.1
Connector USB 2.0 Host J12
Type: USB-A connector
Pin
Signal
CPU Pin Name
Module Pin
1
USBH VBUS
52
2
USBH_HS1_DM
USB_DM1
51
3
USBH_HS1_DP
USB_DP1
50
4
GND
53
6.6
USB 2.0 OTG
A USB Host/Device interface is available at the micro-USB-AB connector J1. The used EMC filters are
dimensioned for High Speed Mode with 480MHz.
The emSBC-Argon-1 is equipped with a reverse current protection at the VBUS-pin of micro-USB
connector. This prevents current to flow into the USBOTG_VBUS-pin of the STM32MP157 processor
if the module is in power down mode.
The VBUS output of the micro-USB-AB connector is provided by PMIC of the emSBC-Argon module.
The VBUS supply voltage USBOTG_VBUS is available at pin 41 of the module and can provide up to
5W.
The interface of the CPU module must be configured according to the level of the ID pin. The
STM32MP157 gets an OTG B-device (Client respectively Device) if nothing or a mini USB-B OTG
connector is plugged in (ID pin is floating). With a plugged mini USB-A OTG connector (ID pin
pulled to GND) the CPU gets an OTG A-device (Host) and supplies the VBUS Pin.
6.6.1
Pinout USB-OTG Connector J1
Type: micro-USB-AB
Pin
Signal
CPU Pin Name
Module Pin
1
USB_OTG VBUS
41
2
USB_OTG_HS_DM
USB_DM2
44
3
USB_OTG_HS_DP
USB_DP2
43
4
USB_OTG_HS_ID
PA10
40
5
GND
42