3.2.8.
Encoder Sensor Interface
The encoder sensor interface uses a NTS0104 level translator. The interface is tested with motors with
open drain and push pull type encoder sensor output. The LDO motor supplied with
ATSAMD21BLDC24V-STK has open drain output type.
3.2.9.
Atmel Xplained PRO Interface
The Xplained PRO compatible header has a 20-pin EXT1 connector and a 4-pin power connector. All the
lines of the 20-pin header are routed to the 67-pin NGFF interface. Some pins of the header are not
connected to the MCU ports, also some pins are connected to other features on the driver board. This is
based on the availability of pins on the MCU card. The table below shows the pinout for both the
connectors in the case of ATSAMD21MOTOR MCU card supplied with the kit.
Table 3-1. EXT1- Xplained PRO Extension Header
Pin Pin name
67-pin interface
Driver board connections
SAMD21J18A port
1
ID_2
4
EDBG_ID2/EXT1_1
EDBG_PB01
2
GND
67
-
GND
3
ADC(+)
20
EXT_3
NC
4
ADC(-)
35
EXT1_4(GPIO10)
NC
5
GPIO5
22
EXT1_5(GPIO5)
PB31
6
GPIO6
23
EXT1_6(GPIO6)
PA17
7
PWM(+)
18
EXT1_7(GPIO1)
PA19
8
PWM(-)
19
EXT1_8(GPIO2)
PB08
9
IRQ/GPIO
37
EXT1_9(GPIO12)
NC
10
SPI_SS_B/GPIO
36
EXT1_10(GPIO11)
NC
11
TWI_SDA
12
TEMP_SDA, EXT1_11
PA22
12
TWI_SCL
13
TEMP_SCL, EXT_12
PA23
13
UART_RX
26
RXD_ EXT1_13
PA13
14
UART_TX
27
TXD_EXT1_14
PA12
15
SPI_SS_A
34
EXT_15
PA02
16
SPI_MOSI
17
SPI_MOSI, EXT1_16
PB16
17
SPI_MISO
15
SPI_MISO, EXT1_17
PA20
18
SPI_SCK
16
SPI_SCK, EXT1_18
PB17
19
GND
67
-
-
20
VCC_P
63
VCC_P
VCC_TARGET_P3V3
Table 3-2. Xplained PRO Power Header
Pin
Signal name
Description
1
VCC_EXT_P5V0
External 5VDC input
2
GND
Ground
Atmel ATSAMD21BLDC24V-STK [USER GUIDE]
Atmel-42681A-SMART-ARM-based-Motor-Control-Kit_User Guide-02/2016
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