DLN-1C PC-I2C/SPI/GPIO Interface (system on chip)

PC-I2C Interface

DLN-1 interface adapter supports Standard (100 kHz), Fast (400 kHz) and Fast Plus (up to 1 MHz) I2C bus frequency modes. I2C Bus voltage can be supplied through internal (3.3V or 5V) or external (2.3V-5V) pull-up resistors. I2C interface pull-up resistors can be configured with solder bridges.

PC-SPI Interface

DLN-1 SPI interface supports all 4 SPI modes and frequencies in the range from 2kHz to 4MHz.

It can perform half-duplex (read or write) and full-duplex (simultaneous read and write) data transactions.

DLN-1 PC-SPI interface adapter operates on 3.3V. However, its SPI interface pins are 5V-tolerant, so you can use it with 5V circuits.

DLN-1 can be connected to a single SPI slave device (it has only one SPI slave select line). If you need more slave select lines or higher SPI bus frequency, consider using DLN-2 or DLN-4M adapters.

If you need an SPI slave interface (connect external SPI bus master to PC), use DLN-4S adapter.

PC-GPIO Interface (General Purpose Digital Input/Output)

The 32 GPIO pins can be configured as general purpose digital inputs or outputs.

Every GPIO pin is equipped with an embedded pull-up resistor. Pull-up resistors are used to ensure that inputs to GPIO lines are settled at expected levels, if external devices are disconnected or at high-impedance state.

These GPIO pins are shared with other modules. If you use I2C, SPI or some other interface, the number of free GPIO pins is reduced by the number of pins used by these modules.

Absolute Maximum Ratings

Operating Conditions