Analog signals are critically important to many projects. Teensy-LC has 13 pins than can function as analog inputs. The effective analog resolution is 12 bits. an extra input for the cable number, from 0 to 15. See File > Examples > Teensy > USB_MIDI > Interface_3x3 set this to the hardware serial port you wish to use #define HWSERIAL Serial1 void setup ( ) { Serial . begin ( 9600 ) ; HWSERIAL . begin ( 9600 ) ; } void loop ( ) { int incomingByte ; if ( Serial . available ( ) > 0 ) { incomingByte = Serial . read ( ) ; Serial . print ( "USB received: " ) ; Serial . println ( incomingByte , DEC ) ; HWSERIAL . print ( "USB received:" ) ; HWSERIAL . println ( incomingByte , DEC ) ; } if ( HWSERIAL . available ( ) > 0 ) { incomingByte = HWSERIAL . read ( ) ; Serial . print ( "UART received: " ) ; Serial . println ( incomingByte , DEC ) ; HWSERIAL . print ( "UART received:" ) ; HWSERIAL . println ( incomingByte , DEC ) ; } } Standard Serial Functions

FLASHMEM - Functions defined with "FLASHMEM" executed directly from Flash. If the Cortex-M7 cache is not already holding a copy of the function, a delay results while the Flash memory is read into the M7's cache. FLASHMEM should be used on startup code and other functions where speed is not important.

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External power of 3.3V can also be applied to the 3.3V pins. This bypasses the on-board regulator and powers the module directly. This is the least desirable way to power the module as it bypasses some of the power protection circuitry. and transfer data. Digital Signal Processing DSP extension instructions accelerate signal processing,

ILI9341 Color TFT Display The best supported display for Teensy 3.2 ILI9341 320x240 Color TFT These displays are the best supported on Teensy 3.2, with multiple high Analog signals are critically important to many projects. Teensy-LC has 13 pins than can function as analog inputs. The effective analog resolution is 12 bits. It also has a true 12 bit digital to analog converter, for an analog output signal. On Linux, PJRC tests X86 & AARCH64 on Ubuntu and ARM32 on Raspbian. Other distros may work, but are not supported. many types of libraries to work well when used together. Direct Memory Access (DMA) Teensy 4.0 has a general purpose 32 channel DMA controller.Teensy 4.1: Primary XBAR Pins 1, 2, 3, 4, 5, 7, 8, 30, 31, 32, 33 - Alt Pins: 0, 36, 37, 42, 43, 44, 45, 46, 47 Red LED: bootloader status Red LED: Bootloader Active & Flash Writing A red LED is dedicated to showing the bootloader status. When If it is desired to separate the VSUB and VIN power inputs, there is a trace between two large solder pads that can be cut as shown here. If the module is normally powered through VIN, this prevents the USB power from also connecting to the board. No special programmer circuit is needed: all programming is done through USB using a proprietary host program and bootloader. MicroMod Teensy: Primary XBAR Pins 1, 2, 3, 4, 5, 7, 8, 30, 31, 32, 33 - Alt Pins: 0, 34, 35, 36, 37, 38, 39

CR2032 Coin Cell connected to VBAT allows Teensy 4.0 to keep date / time while power is off Power USB Power Normally Teensy is powered by your PC or USB hub, through a USB cable. The

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If the software stops resetting the timer for too long, Teensy reboots. Special Timers These extra timers allow delays, analog sample rate timing, carrier modulation, Update LiquidCrystal, Adafruit_GFX, Adafruit_NeoPixel, AltSoftSerial, Audio, CapacitiveSensor, DS1307RTC, Encoder, i2c_t3, ILI9341_t3, OctoWS2811, OneWire, SerialFlash, ShiftPWM, Snooze, TFT_ILI9163C, Time, TimerOne, TimerThree, Adafruit_SSD1306, ADC, OctoWS2811 A USB cable can also be modified by cutting the red 5V power wire inside cable, making it a data only cable. Misc Bits of Info USB Port The Teensy 3.0, 3.1, 3.2 and LC are mostly pin-compatible with one-another. The LC model is a "low cost" variant.

trouble with long wires. Variable Drive Strength The output impedance of each digital output may be controlled in Reducing CPU speed to 528 MHz or lower reduces power consumption. Low Power Features Snooze library Teensy-LC (Low Cost) is a powerful 32 bit microcontroller board, with a rich set of hardware peripherals, at a very affordable price! Tools > USB Type menu configures the type of USB device Teensy will implement. USB Device Teensy's primary communication is its main USB port, which operatates in USB device / The Teensy LC is a good solid performer in the lower end of the Teensy performance spectrum but it is still about 8x faster than an Arduino Uno.It also has a a nice selection of I/O that includes a 12-bit analog output. It is a great low cost choice for someone looking to to embed an MCU into a project that has medium performance and I/O requirements. The main downside for some projects is that it is not 5V tolerant. Getting Started with Teensy Install Arduino IDE Software VIN) pin– External power of 3.7V to 5.5V can be applied to the 5V pin which also powers the on-board 3.3V regulator to power the rest of the module. Crystal and CR2032 Coin Cell connected to VBAT allows Teensy 3.2 to keep date / time while power is off Power USB Power Normally Teensy is powered by your PC or USB hub, through a USB cable. The Teensy-LC will be ideal for inexpensive Internet Of Things projects when paired with a ESP8266 module, which requires a fast hardware serial or SPI port. Beware that there are clones in the same form factor marketed as "Teensy", but which may or may not work in the same way - maybe because it was based on a Teensy 1.0 and not 2.0.