3
VCC_P5V0
5V
4
VCC_P
MCU Voltage
3.2.10. Temperature Sensor
The temperature sensor is placed adjacent to the MOSFET drive circuit to sense the board temperature.
The AT30TSE758 temperature sensor is connected to the MCU through I
2
C and SMBus compatible 2-
wire interface and has 7-bit I
2
C address 1001111.
Table 3-3. I
2
C Pin Connection
Signal
67Pin #
SAMD21J18A MCU pin
Indented MUX function
TEMP SDA
12
PA22
SERCOM3(PAD0)
TEMP SCL
13
PA23
SERCOM3(PAD1)
TEMP alert
24
PB30
IO
3.2.11. Serial Flash
The AT25DF0181A 8Mb serial flash is connected to the MCU through SPI interface. Some of the pins are
routed to the EXT1 header as given in the table below.
Table 3-4. Flash Pin Connection
Signal
67Pin # SAMD21J18A MCU pin
Indented MUX function
Other connection
FLASH SS
14
PA21
SERCOM5(PAD3)
FLASH MISO
15
PA20
SERCOM5(PAD2)
EXT1_17
FLASH SCK
16
PB17
SERCOM5(PAD1)
EXT1_18
FLASH MOSI
17
PB16
SERCOM5(PAD0)
EXT1_16
3.2.12. UID Identification Chip
The UID chip is a unique ID chip used by the EDBG interface to enable automatic board identification in
Atmel Studio. When the motor control evaluation board is connected to the USB port the Atmel studio
recognizes it and load the necessary software and documentation.
3.2.13. USB Communication Interface
The driver board has EDBG and MCU Micro-USB headers. EDBG USB is connected to the HS USB port
of the EDBG device in the MCU card. MCU USB is connected to the USB port of the MCU in the MCU
card plugged in.
3.2.14. Debug Test Points
Test points are available on the driver board for probing debug signals. Proper silk screen text is provided
on the PCB to identify the test points. Some of the most useful test points are highlighted in the image
below.
Atmel ATSAMD21BLDC24V-STK [USER GUIDE]
Atmel-42681A-SMART-ARM-based-Motor-Control-Kit_User Guide-02/2016
20
