PJRC TEENSY 4

Overview

The Teensy is a complete USB-based microcontroller development system, in a very small footprint, capable of implementing many types of projects. All programming is done via the USB port.

Hardware

  • MIMXRT1062DVL6A MCU (600 MHz, 1024 KB on-chip memory)

  • 16 Mbit QSPI Flash

  • User LED

  • USB 2.0 host connector

See the Teensy 4.0 Website [1] for a complete hardware description.

For more information, check the i.MX RT1060 Datasheet [4].

Supported Features

The Teensy 4.0 board configuration supports the following hardware features:

Interface

Controller

Driver/Component

ADC

on-chip

adc

CLOCK

on-chip

clock_control

FLASH

on-chip

flash

GPIO

on-chip

gpio

I2C

on-chip

i2c

I2S

on-chip

i2s

NVIC

on-chip

arch/arm

PWM

on-chip

pwm

RTC

on-chip

system clock

SPI

on-chip

spi

CAN

on-chip

can

UART

on-chip

serial

USB

on-chip

usb

TRNG

on-chip

entropy

WDT

on-chip

watchdog

The Teensy 4.1 board configuration supports additional hardware features:

Interface

Controller

Driver/Component

SDHC

on-chip

disk access

ENET

on-chip

ethernet

Other hardware features have not been enabled yet for this board.

Connections and IOs

Pin mappings from Teensy to MIMXRT1062 SoC.

Pin

Pad ID

Usage

0

AD_B0_03

GPIO1_3 / UART6_RX / CAN2_RX

1

AD_B0_02

GPIO1_2 / UART6_TX / CAN2_TX

2

EMC_04

GPIO4_4

3

EMC_05

GPIO4_5

4

EMC_06

GPIO4_6

5

EMC_08

GPIO4_8

6

B0_10

GPIO2_10

7

B1_01

GPIO2_17 / UART4_RX

8

B1_00

GPIO2_16 / UART4_TX

9

B0_11

GPIO2_11

10

B0_00

GPIO2_0

11

B0_02

GPIO2_2

12

B0_01

GPIO2_1

13

B0_03

GPIO2_3 / LED

14

AD_B1_02

GPIO1_18 / UART2_TX

15

AD_B1_03

GPIO1_19 / UART2_RX

16

AD_B1_07

GPIO1_23 / UART3_RX / I2C3_SCL

17

AD_B1_06

GPIO1_22 / UART3_TX / I2C3_SDA

18

AD_B1_01

GPIO1_17 / I2C1_SDA

19

AD_B1_00

GPIO1_16 / I2C1_SCL

20

AD_B1_10

GPIO1_26 / UART8_TX

21

AD_B1_11

GPIO1_27 / UART8_RX

22

AD_B1_08

GPIO1_24 / CAN1_TX

23

AD_B1_09

GPIO1_25 / CAN1_RX

24

AD_B0_12

GPIO1_12 / UART1_TX / I2C4_SCL

25

AD_B0_13

GPIO1_13 / UART1_RX / I2C4_SDA

26

AD_B1_14

GPIO1_30 / SPI3_MOSI

27

AD_B1_15

GPIO1_31 / SPI3_SCK

28

EMC_32

GPIO3_18 / UART7_RX

29

EMC_31

GPIO4_31 / UART7_TX

30

EMC_37

GPIO3_23 / CAN3_RX

31

EMC_36

GPIO3_22 / CAN3_TX

32

B0_12

GPIO2_12

33

EMC_07

GPIO4_7

Only Teensy 4.0:

34

SD_B0_03

GPIO3_15

35

SD_B0_02

GPIO3_14

36

SD_B0_01

GPIO3_13

37

SD_B0_00

GPIO3_12

38

SD_B0_05

GPIO3_17

39

SD_B0_04

GPIO3_16

Only Teensy 4.1:

34

B1_13

GPIO2_29 / UART5_RX

35

B1_12

GPIO2_28 / UART5_TX

36

B1_02

GPIO2_18

37

B1_03

GPIO2_19

38

AD_B1_12

GPIO1_28 / SPI3_CS

39

AD_B1_13

GPIO1_29 / SPI3_MISO

40

AD_B1_04

GPIO1_20

41

AD_B1_05

GPIO1_21

Programming and Debugging

Flashing

Both the Teensy 4.0 and Teensy 4.1 ship with a dedicated bootloader chip, which supports flashing using USB. This allows easy flashing of new images, but does not support debugging the device.

  1. Build the Zephyr kernel and the Blinky sample application.

west build -b teensy40 samples/basic/blinky

  1. Connect the board to your host computer using USB.

  2. Tap the reset button to enter bootloader mode. Red LED blinks.

  3. Flash the image.

west build -b teensy40 samples/basic/blinky
west flash

  1. You should see the orange LED blink.

Configuring a Console

By default console output is mapped to teensy pins 0 (RX1) and 1 (TX1). Connect a usb-to-serial adapter to use this serial console. Use the following settings with your serial terminal of choice (minicom, putty, etc.):

  • Speed: 115200

  • Data: 8 bits

  • Parity: None

  • Stop bits: 1

References