SAM L22 Xplained Pro has several resistors that can be used to disconnect I/O pins of the ATSAML22N18A from connectors and on-board ICs and to disconnect power signals.
Info: Note
that there are some resistors that aren't mounted by default on the kit listed in the
table below.
| Designator | Value | From | To | Comment |
|---|---|---|---|---|
| J100 | cut-strap | VCC_P3V3 | VCC_P3V3_CM_IN | ATSAML22N18A, peripherals and connectors power supply |
| R107 | 0R | U100 OUT | VCC_CM_P3V3 | XAM power supply |
| R108 | 0R | U100 OUT | VCC_EDBG_P3V3 | EDBG power supply |
| R305 | 0R | U302 SDA | PB30 I2C SDA | Allows complete or partial disconnect of U302, ATECC508A from ATSAML22N18A |
| R307 | 0R | U302 SCL | PB31 I2C SCL | |
| R400 | 39R | EDBG TARGET RESET | TARGET MCU RESET | Debug interface from the EDBG to the ATSAML22N18A |
| R404 | 0R | EDBG SWCLK | PA30 SWCLK | |
| R405 | 0R | EDBG SWDIO | PA31 SWDIO | |
| R601 | 0R | XAM ADC_SYNC1 | PB04 GPIO | XAM ADC sync interfaces to the ATSAML22N18A. |
| R600 | 0R | XAM ADC_SYNC2 | PB05 GPIO | |
| R406 | 0R | EDBG CDC RX | PC24 UART TX | EDBG CDC and DGI interfaces to the ATSAML22N18A |
| R407 | 0R | EDBG I2C SDA | PB30 I2C SDA | |
| R408 | 0R | EDBG I2C SCL | PB31 I2C SCL | |
| R414 | 330R | EDBG CDC TX | PC25 UART RX | |
| R415 | 0R | EDBG SPI MOSI | PB22 SPI MOSI | |
| R416 | 330R | EDBG DGI_GPIO0 | PB04 GPIO | |
| R417 | 330R | EDBG DGI_GPIO1 | PB05 GPIO | |
| R418 | 330R | EDBG DGI_GPIO2 | PC00 GPIO | |
| R419 | 330R | EDBG DGI_GPIO3 | PC01 GPIO | |
| R420 | 330R | EDBG SPI MISO | PB24 SPI MISO | |
| R425 | 0R | EDBG SPI SCK | PB23 SPI SCK | |
| R426 | 0R | EDBG SS | PB25 SPI SS | |
| R427 | 0R | TARGET RESET SENSE | TARGET_MCU_RESET | Reset sense signal to EDBG, used to detect external resets |
| R900 | 0R | TARGET MCU RESET | RESET UNO | ATSAML22N18A reset signal to Arduino connectors |
Figure 1. Assembly Drawing Top
Figure 2. Assembly Drawing Bottom
