th Oct. 2009 22 www.semtech.com SX1507/SX1508/SX1509 W" />
參數資料
型號: SX1509BULTRT
廠商: Semtech
文件頁數: 15/41頁
文件大小: 0K
描述: IC GPIO EXPANDER I2C 16CH 28QFN
特色產品: SX1508/SX1509 GPIO Expanders
標準包裝: 1
接口: I²C
輸入/輸出數: 16
中斷輸出:
頻率 - 時鐘: 400kHz
電源電壓: 1.2 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 28-UFQFN 裸露焊盤
供應商設備封裝: 28-QFN-UT(4x4)
包裝: 標準包裝
包括: LED 驅動器 / 小鍵盤引擎
其它名稱: SX1509IULDKR
SX1509IULDKR-ND
ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 30
th Oct. 2009
22
www.semtech.com
SX1507/SX1508/SX1509
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
4.9.7
Tutorial
Below are the steps required to use the LED driver with the typical LED connection described §6.2:
-
Disable input buffer (RegInputDisable)
-
Disable pull-up (RegPullUp)
-
Enable open drain (RegOpenDrain)
-
Set direction to output (RegDir) – by default RegData is set high => LED OFF
-
Enable oscillator (RegClock)
-
Configure LED driver clock and mode if relevant (RegMisc)
-
Enable LED driver operation (RegLEDDriverEnable)
-
Configure LED driver parameters (RegTOn, RegIOn, RegOff, RegTRise, RegTFall)
-
Set RegData bit low => LED driver started
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