Power Probe Header J86; Debug Serial Uart Header J61 - Intrinsyc Open-Q 820 User Manual

Open-Q™ 820 (APQ8096) / 820Pro (APQ8096SG) µSOM Development Kit User Guide Version 1.4

3.8.5 Power Probe Header J86

The power probe header is used to sense/ monitor the current on the 3.8V power rail going
into the µSOM. The table below summarizes the pin outs of header J86.
µSOM power positive current sense line
µSOM power negative current sense line
GND

3.8.6 Debug Serial UART Header J61

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 page 17 of the µSOM carrier board schematic for details on what to install for
this header to be functional.
The header consists of TX, RX and GND pins. This 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
Figure 7 J86 Power Probe Header
Description
Figure 8 J61 3.3V TTL Debug UART
Signal
BLSP8_UART_RX
BLSP8_UART_TX
GND
Copyright Intrinsyc Technologies Corporation
Signal
µSOM_PWR_SENSE_P
µSOM_PWR_SENSE_N
GND
Pin
J61[1]
J61[2]
J61[3]
24
Pin
J86[1]
J86[2]
J86[3]
FTDI RPI cable
connection
Orange
Yellow
Black