The WLR089 Xplained Pro Evaluation board contains several resistors that can be used to disconnect I/O pins of the WLR089U0 module from connectors and on-board ICs, and to disconnect power signals.
| Designator | Value | From | To | Comment |
|---|---|---|---|---|
| R322 | 0R | EDBG SWDIO | PA31 SWDIO | Debug interface from the EDBG to the WLR089U0 module |
| R323 | 0R | EDBG SWDCLK | PA30 SWDCLK | |
| R324 | 0R | EDBG TARGET RESET | TARGET MCU RESET | |
| R310 | 0R | EDBG SPI SS | PA27 GPIO | EDBG CDC and DGI interfaces to the WLR089U0 module |
| R311 | 0R | EDBG SPI SCK | PB23 SPI SCK | |
| R312 | 0R | EDBG SPI MOSI | PB22 SPI MOSI | |
| R313 | 0R | EDBG SPI MISO | PB02 SPI MISO | |
| R314 | 0R | EDBG DGI SDA | PA16 I2C SDA | |
| R315 | 0R | EDBG DGI SCL | PA17 I2C SCL | |
| R316 | 0R | EDBG CDC RX | PA04 UART TX | |
| R317 | 0R | EDBG CDC TX | PA05 UART RX | |
| R318 | 0R | EDBG DGI_GPIO0 | PA08 GPIO | |
| R319 | 0R | EDBG DGI_GPIO1 | PA14 GPIO | |
| R320 | 0R | EDBG DGI_GPIO2 | PA15 GPIO | |
| R321 | 0R | EDBG DGI_GPIO3 | PA22 GPIO | |
| R229 | 0R | TARGET VUSB DETECT | PA07 ADC7 | To detect if a USB cable is connected to the TARGET USB connector |
| R109 | 47K | VCC_P3V3_CM_IN | TARGET VOLTAGE | To detect the target voltage of 3.3V in the voltage divider network |
| R325 | 0R | RESET | TARGET RESET SENSE | Reset sense signal to EDBG, to detect external Resets |
| R364 | 0R | PB23_S5_SPI_SCK_EXT3 | PB23_S5_SPI_SCK | To disconnect the SPI clock line to EXT3 |
| R365 | 0R | PB23_S5_SPI_SCK_EXT1 | PB23_S5_SPI_SCK | To disconnect the SPI clock line to EXT1 |
| R366 | 0R | PB23_S5_SPI_SCK_EDBG | PB23_S5_SPI_SCK | To disconnect the SPI clock line to EDBG |
| R367 | 0R | PB23_S5_SPI_SCK_FLASH | PB23_S5_SPI_SCK | To disconnect the SPI clock line to serial Flash |
| R337 | 0R | PA15_XOUT | PA15_GPIO | To use the optional 12 MHz external crystal output |
| R338 | 0R | PA14_XIN | PA14_GPIO | To use the optional 12 MHz external crystal input |
| R202 | 39R | Pin6_GPIO of EXT1 (PA28_GPIO) | User Button (SW0) | To disconnect the user button |
| R235 | 10K | PIN3_ADC(+) of EXT1 (PA06_ADC6_PTCY4) | QTouch® Button | To disconnect the QTouch® button |
| R201 | 0R | Pin8 of EXT1 (PA19_PWM_T0_W3) | LED_YELLOW (LED0) | To disconnect the yellow user LED |
| R234 | 0R | Pin7 of EXT1 (PA18_PWM_T0_W2) | LED_GREEN (LED1) | To disconnect the green user LED |
| R231 | 330R | PA15_GPIO | ID pin of Target MCU USB | To disconnect the ID pin of target MCU USB |