CPU_45A-V3
CPU Board XMC4500 General Purpose
Hardware Description
Board User's Manual
19
Revision 1.0, 2014-01-10
2.7
USB
The XMC4500 supports USB interface in host only mode, device only mode or as an OTG Dual Role Device
(DRD). In USB device mode, power is expected through VBUS (pin 1) from an external host (e.g. PC). When
the current is more than 500 mA power from an external source through satellite cards shall be used.
Note: Some PCs, notebooks or hubs have a weak USB supply which is not sufficient for proper supply. In this
case use an external 5 Volt power supply or a powered USB hub.
Figure 17 USB Connector Schematic
Port P0.9 of XMC4500 is connected to the USB ID pin (pin 4). An OTG device will detect whether a USB 3.0
Micro-A or Micro-B plug is inserted by checking the ID pin. When the ID = FALSE, Micro-A connector is plugged
and when ID = TRUE a Micro-B connector is plugged in.
When ID is true the XMC4500 acts as USB host else
as USB device.
Table 7
USB micro AB connector Pinout
Pin No.
Pin Name
Pin Description
1
VBUS
5 V
2
D-
Data Minus
3
D+
Data Plus
4
ID
Identification
5
GND
Ground
Figure 18 USB power generation - Host/OTG mode
