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Snapdragon 820 SBC Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
2.8
Serial Interface Features
2.8.1
Debug UART Header
Snapdragon 820 SBC supports debug console port through 3pin UART header (J8). APQ8096 CPU
’s
BLSP8-UART
interface is used for Debug UART interface and connected to UART header through 1.8V to 3.3V Voltage level
translators. TTL-232R-RPI cable can be used to connect the SBC to PC for establishing the debug console. UART
header (J8) is physically located on bottom of the board as shown below.
Figure 8: Debug UART Connector
Table 4: Debug UART Header Pin Out
Pin
No
Pin Name
Signal Name
Signal Type/
Termination
Description
1
TX
BLSP8_UART_TX
O, 3.3V CMOS
UART Transmit signal.
2
RX
BLSP8_UART_RX
I, 3.3V CMOS
10K PD
UART Receive Signal.
3
GND
GND
Power
Ground
