User's Manual
HC864-AUTO Hardware User Guide
1vv0300946 Rev.4 – 2012-12-27
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 67 of 77
15. Application guide
15.1. Debug of the HC864-AUTO in production
To test and debug the mounting of HC864-AUTO, we strongly recommend to foresee test
pads on the host PCB, in order to check the connection between the HC864-AUTO itself and
the application and to test the performance of the module connecting it with an external
computer. Depending on the customer application, these pads include, but are not limited to
the following signals:
• TXD
• RXD
• ON/OFF
• RESET
• GND
• VBATT
• TX_TRACE
• RX_TRACE
• PWRMON
• USB_VBUS
• USB_D+
• USB_D-