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.

TEENSY40

Fig. 167 TEENSY40 (Credit: https://www.pjrc.com)

TEENSY41

Fig. 168 TEENSY41 (Credit: https://www.pjrc.com)

Hardware

Teensy 4.0:

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

  • 16 Mbit QSPI Flash

  • LED

  • USB 2.0 host connector

Teensy 4.1:

  • MIMXRT1062DVJ6A MCU (600 MHz, 1024 KB on-chip memory)

  • 64 Mbit QSPI Flash

  • LED

  • USB 2.0 host connector

  • USB 2.0 OTG connector

  • 10/100 Mbit/s Ethernet PHY

  • TF socket for SD card

See the Teensy 4.0 Website for a complete hardware description.

Supported Features

The teensy40 board configuration supports the following hardware features:

Interface

Controller

Driver/Component

NVIC

on-chip

nested vector interrupt controller

SYSTICK

on-chip

systick

GPIO

on-chip

gpio

I2C

on-chip

i2c

UART

on-chip

serial port-polling; serial port-interrupt

USB

on-chip

USB device

The default configuration can be found in the defconfig file: boards/arm/teensy4/teensy40_defconfig

The teensy41 board configuration supports additional hardware features:

Interface

Controller

Driver/Component

SDHC

on-chip

disk access

ENET

on-chip

ethernet

The default configuration can be found in the defconfig file: boards/arm/teensy4/teensy41_defconfig

Other hardware features are not currently supported by the port.

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

27

AD_B1_15

GPIO1_31

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

39

AD_B1_13

GPIO1_29

40

AD_B1_04

GPIO1_20

41

AD_B1_05

GPIO1_21

Programming and Debugging

Flashing

Build applications as usual (see Building an Application for more details).

Flash hex-file with the documented tools:

Debugging

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