DLN-1 is a cheapest and smallest PC-I2C/SPI/GPIO interface adapter currently available on the market. The DLN-1 adapter comes without assembled connectors, so you can solder it directly to the breadboard or to the main PCB of your device. Most of our customers use this adapter as an integral part of their final product.
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.
Symbol Parameter Condition Min Max Freq I2C Bus Frequency configurable 1 kHz 1 MHz PullUp Pull-Up Resistors configurable with solder bridges 240 Ohm 1.5K VIH Input High Voltage 2.31V 5.5V VIL Input Low Voltage -0.3V 0.99V VOHi Output High Voltage Internal VCC 2.9V VOHe Output High Voltage External VCC (VCC-0.4)V VOL Output Low Voltage 0.4V
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.
Symbol Parameter Condition Min Max Freq SPI Bus Frequency configurable 2 kHz 4 MHz SS Slave Select Pin D.1 (25) 1 1 VIH Input High Voltage 2.31V 5.5V VIL Input Low Voltage -0.5V 0.99V VOH Output High Voltage IOUT= 4.0mA 2.9V VOL Output Low Voltage IOUT= -4.0mA 0.4V
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.
Symbol Parameter Condition Min Max VIH Input High Voltage 2.31V 5.5V VIL Input Low Voltage -0.5V 0.99V VOH Output High Voltage IOUT= 4.0mA 2.9V VOL Output Low Voltage IOUT= -4.0mA 0.4V IL Input Leakage Current I/O Pin 0.001mA IDC DC Current per I/O Pin 3.0V<VDDIO<3.6V; VOH=2.8V 8mA
Absolute Maximum Ratings
Parameter Min Max Storage Temperature -66°C +150°C Ambient Temperature Under Bias -40°C +85°C DC Input Voltage to Any Pin -0.5V +5.5V DC Input Voltage to Pins in ADC mode 0V +3.6V
Parameter Min Max Ta (Ambient Temperature Under Bias) 0°C +70°C DC Current VCC and GND Pins 50mA
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