Debug Serial Uart Header J61; Figure 7 J61 3.3V Ttl Debug Uart; Table 3.8-3 Power Header J86 Pin-Out; Table 3.8-4 Debug Uart Header J61 Pin-Out - Intrinsyc Lantronix Open-Q 820 User Manual

Description
SOM power positive current sense
line
SOM power negative current sense
line
GND

3.8.5 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 16 of 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
Open-Q™ 820 Dev Kit User Guide

Table 3.8-3 Power Header J86 Pin-out

Signal
SOM_PWR_SENSE_P
SOM_PWR_SENSE_N
GND

Figure 7 J61 3.3V TTL Debug UART

Table 3.8-4 Debug UART Header J61 Pin-out

Signal
BLSP8_UART_RX
BLSP8_UART_TX
GND
Open-Q™ 820 Development Kit
pin
J86[1]
J86[2]
J86[3]
pin
J61[1]
J61[2]
J61[3]
FTDI RPI cable
connection
Orange
Yellow
Black
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