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LE910Cx HW User Guide
11. APPLICATION GUIDE
Debug of the LE910Cx Module in Production
To test and debug the mounting of the LE910Cx module, we strongly recommend adding
several test pads on the application board design for the following purposes:
• Check the connection between the LE910Cx itself and the application
• Test the performance of the module by connecting it to an external computer
Depending on the customer's application, these test pads include, but are not limited to
the following signals:
• TXD
• RXD
• ON/OFF
• HW_SHUTDOWN_N
• GND
• VBATT
• TX_AUX
• RX_AUX
• USB_VBUS
• USB_D+
• USB_D-
• GPIO_09
• WCI_RX
In addition, the following signals are also recommended (but not mandatory):
• PWRMON
• GPIO_01 (STAT_LED)
• GPIO_08 (SW_RDY)
Bypass Capacitor on Power Supplies
When there is a sudden voltage step to or a cut from the power supplies, the steep
transition causes some reactions such as overshoot and undershoot. This abrupt voltage
transition can affect the device causing it to fail or malfunction.
1VV0301298 Rev. 33
Page 101 of 128
Not Subject to NDA
2021-06-29
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