u-blox XPLR-AOA-3, User Manual

Page: 24 / 44

UBX-22006906 - R03 Page 24 of 44
C1-Public
The main components of any C209 tag are shown in Figure 22 .
Figure 22: C209 main functional components
The important pin definitions on the C209 application board are described in Table 4 .
No. Name I/O Description Remarks
GPIO_1 RED O RED system status signal Active low
GPIO_2 LIS_INT I Interrupt signal from Ambient Light
Sensor May cause current leak in default configuration.
See C209 GitHub repository
[12] for more
information.
GPIO_7 GREEN O GREEN system status signal Active low
GPIO_8 BLUE O BLUE system status signal Active low
GPIO_18 SWITCH_2 I Switch_2 button Active low
GPIO_20 UART_RTS O UART request to send control signal Used only when hardware flow control is enabled
GPIO_21 UART_CTS I UART clear to send control signal Used only when hardware flow control is enabled
GPIO_22 UART_TXD O UART data output
GPIO_23 UART_RXD I UART data input
GPIO_42 LIS_INT I Interrupt signal from accelerometer
Table 4: Important pin definitions on the C209
For more information about programming the module, see also the NINA-B4 system integration
manual
[13] and NINA-B40 data sheet [14] . See also C209 schematics .
☞
Although the sensors on the C209 application board are not used in the latest direction-finding
tag software from u-blox, the sensors can be utilized in any customer application.