Rcm Header J0901; Debug Serial Uart Header J2103; Debug Serial Uart Over Usb J2102 - Intrinsyc Open-Q 835 User Manual

Open-Q™ 835 Development Kit based on the Snapdragon™ 835 (APQ8098) Processor User Guide Version 1.0

3.8.5 RCM Header J0901

The RCM header is used to sense/ monitor the current on the 3.8V power rail going into the
Processor board. The table below summarizes the pin outs of header J0901.
Processor board power positive current
sense line
Processor board power negative current
sense line
GND

3.8.6 Debug Serial UART Header J2103

The UART header and supporting circuitry does not come preinstalled. To have access to
the debug UART, a 3-pin header needs to be installed as well as the supporting circuitry.
Please see the carrier board schematic for details on what to install for this header to be
functional.
The header consists of TX, RX and GND pins. It is a 3.3V TTL UART header. To get the
serial terminal working with a PC, the following cable (or similar) is needed
http://www.digikey.ca/product-detail/en/TTL-232R-RPI/768-1204-ND/4382044
Description
APQ UART RX (GPIO5)
APQ UART TX (GPIO4)
GND

3.8.7 Debug Serial UART over USB J2102

Table 3.8-6 J10901 Pin out
Description
Figure 9 J2103 Debug UART Header
Table 3.8-7 J2103 Debug UART Header Pin out
Signal
BLSP8_UART_RX
BLSP8_UART_TX
GND
Copyright Intrinsyc Technologies Corporation
Signal
SOM_PWR_SENSE_P
SOM_PWR_SENSE_N
GND
Pin
J2103[1]
J2103[2]
J2103[3]
25
Pin
J0901[1]
J0901[2]
J0901[31-34]
FTDI RPI cable
connection
Orange
Yellow
Black