Microchip Technology ATSAMB11ZR, Руководство пользователя

Страница: 15 / 26

Cortex Debug
Connector pin Pin / Net Function Shared functionality
5 GND Ground
6 - -
7 - -
8 - -
9 GND Ground
10 CHIP EN Target reset signal Reset Button
Note: The Target reset (CHIP EN pin on the ATSAMB11ZR-210CA module) is isolated from the Cortex
Debug Connector by R300 (0 Ohm link) which is not mounted by default in the PCBA.
4.2 Peripherals
4.2.1 Crystals
The SAM B11ZR Xplained Pro kit contains one mounted 32.768kHz crystal that can be used as a clock
source for the SAM B11ZR. The crystal has cut-straps next to it that can be used to measure the
oscillator safety factor. This is done by cutting the strap and adding a resistor across the strap.
Information about oscillator allowance and safety factors can be found in application note
AVR41001 .
Table 4-4. External 32.768kHz Crystal
SAM B11ZR pin Function Shared functionality
RTC_CLKP XIN32 -
RTC_CLKN XOUT32 -
4.2.2 Mechanical Buttons
SAM B11ZR Xplained Pro contains two mechanical buttons:
• RESET button connected to the SAM B11ZR reset line
– When the RESET button is pressed it drives the I/O line to ground
• Generic user configurable button
– When the user button is pressed it drives the I/O line to target voltage
Note: There is no pull up resistor connected to the generic user button. Remember to enable the
internal pull up in the SAM B11ZR to use the button.
Table 4-5. Mechanical Buttons
SAM B11ZR pin Silkscreen text Shared functionality
CHIP EN RESET EDBG SWD
AO_GPIO_0 SW0 EXT1
4.2.3 LED
There is one yellow LED available on the SAM B11ZR Xplained Pro board that can be turned on and off.
The LED can be activated by driving the connected I/O line to GND.
ATSAMB11ZR
©
2017 Microchip Technology Inc.
User Guide
DS70005334A-page 15