5.2.4 Position Decoder
SAM E54 Xplained Pro has a header footprint for the position decoder module. The PDEC can be used
for quadrature, hall, and counter decoding.
Info: External pull-ups are mounted on the three signal lines for use with passive quadrature
encoders.
Table 5-6. PDEC Header
J407 pin SAM E54 pin Function Shared functionality
1 [PHASE A] PC16 PDEC QDI[0] EDBG GPIO0
2 [PHASE B] PC17 PDEC QDI[1] EDBG GPIO1
3 [INDEX] PC18 PDEC QDI[2] EDBG GPIO2 and User LED
4 - GND -
5.2.5 VBAT Backup Select
There is a 1x3, 100mil pin-header on the kit that can be used to select a power source for the VBAT pin
(PB03) marked "VBAT Select". The power source can either be the onboard 3.3V that supplies the other
peripherals on the board, or the onboard super capacitor. To select the source for the VBAT pin, move the
jumper to the desired voltage by placing the jumper between pin 1-2 for the super capacitor, or between
pin 2-3 for the targets MCU voltage. If power to the VBAT pin is not needed, the jumper can be removed
and PB03 at the center pin can be used as a GPIO.
Table 5-7. VBAT Select Header
Pin Function Description
1 VCC_SUPERCAP Power from super capacitor
2 PB03 VBAT input pin on SAM E54
3 VCC_MCU_P3V3 Power from the target MCU supply
5.2.6 ADC/DAC Header
There is a 1x2, 100mil pin-header on the kit that can be used for connecting analog peripherals for use
with the built in ADC or DAC.
Table 5-8. ADC/DAC Header
Pin number Pin/Net Function Shared functionality
1 PA02 ADC0/AIN0 or DAC/
VOUT0
-
2 GND Ground -
5.2.7 USB
SAM E54 Xplained Pro has a USB Micro-AB connector for use with the SAM E54 USB module labeled
TARGET USB on the kit. To be able to detect when a target USB cable is connected in self-powered
mode, a GPIO is used to detect the VBUS voltage on the connector. The USB ID is connected to a power
switch, which will automatically enable power to the USB port if a device cable is detected. The USB ID
SAM E54 Xplained Pro
© 2017 Microchip Technology Inc.
DS70005321A-page 21
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