User Guide

ME910G1 Hardware Design Guide
1VV0301593 Rev.15 Page
47 of 100 2022-08-23
Not Subject to NDA
The capacitor is rated with the following formula:
Tip
:
Make the same plot during system verification to check
timings and voltage levels.
Fast Shut Down by Software
The fast shut down can be triggered by AT command.
Communication Ports
Note
: It is recommended to add PCB test points to UART, UART_AUX
and USB of unused modules (for products supporting USB), it may be
useful to reflash, test and debug the application. Test points for UART
or USB are fine, however it is recommend to place the pads for a
suitable connector on the port, for convenient access for network
certification testing and access during early development testing.
The USB connector can be “DNP” as long as it is not needed. This
may be more convenient than just test points alone.
USB 2.0 HS
The ME910G1 includes one integrated universal serial bus (USB 2.0 HS) transceiver.
The following table lists the available signals:
PAD
Signal
I/O
Function
NOTE
B15
USB_D+
I/O
USB differential Data (+)
C15
USB_D-
I/O
USB differential Data (-)
A13
VUSB AI Power sense for the internal USB transceiver.
Accepted range: 3.0V
to 5.5V
100K pull down
Table 23: Available Signals
The USB_DPLUS and USB_DMINUS signals have a clock rate of 480 MHz, so the signal
traces should be carefully routed. Trace lengths, number of vias and capacitive loading