Added Interstate75 description

_board/pimoroni_interstate75.md

@@ -4,7 +4,7 @@ board_id: "pimoroni_interstate75"
 title: "Interstate 75 Download"
 name: "Interstate 75"
 manufacturer: "Pimoroni"
-board_url: "https://pimoroni.com/i75"
+board_url: "https://shop.pimoroni.com/products/interstate-75"
 board_image: "pimoroni_interstate75.jpg"
 date_added: 2021-12-02
 family: raspberrypi
@@ -14,4 +14,24 @@ features:
   - Breadboard-Friendly
 ---
 
-Oops! Looks like we don't know anything about this board. This means it's likely very new.
+Enter the (LED) matrix with Interstate 75 - a RP2040-powered driver board for HUB75-style RGB matrices, designed to plug neatly into the back of a LED panel. It provides a quick and easy way to whip up some scrolling signage or an eye-catching LED display for sensor outputs.
+
+## Features
+* Powered by RP2040
+* Dual Arm Cortex M0+ running at up to 133Mhz
+* 264kB of SRAM
+* 2MB of QSPI flash supporting XiP
+* Compatible with 32x32, 32x64 and 64x64 LED matrices.
+* Sturdy screw terminals for powering the LED panels.
+* USB-C connector for power and programming (3A max)
+* Qw/ST (Qwiic/STEMMA QT) connector
+* Reset, BOOT and a user button (the BOOT button can also be used as a user button)
+* RGB LED
+
+## About the RP2040
+Raspberry Pi's RP2040 microcontroller is a dual core ARM Cortex M0+ running at up to 133Mhz. It bundles in 264kB of SRAM, 30 multifunction GPIO pins (including a four channel 12-bit ADC), a heap of standard peripherals (I2C, SPI, UART, PWM, clocks, etc), and USB support.
+
+One very exciting feature of RP2040 is the programmable IOs which allow you to execute custom programs that can manipulate GPIO pins and transfer data between peripherals - they can offload tasks that require high data transfer rates or precise timing that traditionally would have required a lot of heavy lifting from the CPU.
+
+## Purchase
+* [Pimoroni](https://shop.pimoroni.com/products/interstate-75)