About the Module
The next table shows the multiplexing mechanism:
USB Host Controller single-ended
signal
USB_P2_1
USB_P2_2
USB_P2_3
USB_P2_4
USB_P2_5
USB_P2_6
USB_P2_7
USB_P2_8
ConnectCore XP 270 signal, with which it ’s
multiplexed
FF_CTS# / GPIO35
GPIO34
FF_RI# / GPIO38
FF_DCD# / GPIO36
FF_DTR# / GPIO40
FF_TXD / GPIO39
FF_RTS# / GPIO41
FF_DSR# / GPIO37
If both USB Host and Device must be implemented on the ConnectCore XP 270
module, the following signals need to be sacrificed: FF_CTS# / GPIO35, GPIO34,
FF_RI# / GPIO38, FF_DCD# / GPIO36, FF_DTR# / GPIO40, FF_TXD / GPIO39,
FF_RTS# / GPIO41 and FF_DSR# / GPIO37.
With USB single-ended GPIOs you can interface an external OTG transceiver, an
external charge pump device, and an external USB transceiver. The drawings on the
next pages show details.
www.digi.com
17
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