資料來源:https://www.sparkfun.com/products/13601
Are you low on I/O? No problem! The SX1509 Breakout is a 16-channel GPIO expander with an I2C interface – that means with just two wires, your microcontroller can interface with 16 fully configurable digital input/output pins. But the SX1509 can do so much more than just simple digital pin control. It can produce PWM signals, so you can dim LEDs. It can be set to blink or even breathe pins at varying rates. This breakout is similar to a multiplexer or “mux,” in that it allows you to get more IO from less pins. And, with a built-in keypad engine, it can interface with up to 64 buttons set up in an 8x8 matrix.
Two headers at the top and bottom of the breakout board function as the input and control headers to the board. This is where you can supply power to the SX1509, and where your I2C signals – SDA and SCL – will terminate. GPIO and power buses are broken out in every-which direction, and configurable jumpers cover most of the rest of the board.
Since the I/O banks can operate between 1.2V and 3.6V (5.5V tolerant) independent of both the core and each other, this device can also work as a level-shifter. The SX1509 breakout makes it easy to prototype so you can add more I/O onto your Arduino or I/O limited controller. We’ve even spun up an Arduino Library to get you started!
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你是在低I / O?沒問題!該SX1509突圍是一個16通道GPIO擴展的I 2 C接口-即只用兩根導線意味著,你的微控制器可以用16個完全可配置的數字輸入/輸出引腳接口。但SX1509可以做的不僅僅是簡單的數字引腳控制這麼多。它可以產生PWM信號,這樣就可以調暗的LED。它可以被設置為閃爍或者甚至不同的速率呼吸引腳。並且,具有內置鍵盤發動機,它可以在一個8×8矩陣設定最多64個按鈕接口。
兩個頭的接口板功能的輸入和控制包頭中板的頂部和底部。在這裡,您可以供電給SX1509,並在你的I 2 C信號- SDA和SCL -將終止。 GPIO和電源總線在每個-哪個方向爆發,並配置跳線覆蓋大部分板的其餘部分。
由於I / O銀行可以1.2V和3.6V(5.5V寬容)獨立的核心和對方兩者之間的操作,該設備還可以作為一個電平轉換器。該SX1509突破可以很容易地原型,以使您可以添加更多的I / O到您的Arduino或I / O控制器有限。我們甚至加速旋轉一個Arduino庫讓你開始!
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