18
18
AsteRx-m2a OEM
18
2.
By driving the button pin (pin#25) low for at least 5 seconds before turning off the
receiver.
2.11
USB Interface
The user can configure the USB device interface in either USB 1.1 (full speed) mode, or in
USB 2.0 (high speed) mode. USB 2.0 allows higher bandwidth (480 Mbps vs 12 Mbps), but
may not be supported by all host hardware.
By default, USB is configured in USB 1.1 mode. The update files
“AsteRx
-m2a
_USB_1_1.suf”
and “AsteRx
-m2a
_USB_2_0.suf”
located in the
USB/
folder of the firmware package can be
used to change this. The current USB mode can be checked with the command
“
lif,
Identification
”.
2.12
Ethernet
The receiver supports full duplex 10/100 Base-T Ethernet communication. The Ethernet
PHY and magnetics are to be implemented on the host board. Connection with the PHY
is through the RMII interface available on the 60-pin connector.
An example of application circuit is given in the next page. Two options are shown: stand-
alone magnetics or magnetics integrated in a RJ45 connector.
