th Oct. 2009 22 www.semtech.com SX1507/SX1508/SX1509 W" />
參數(shù)資料
型號(hào): SX1508IULTRT
廠(chǎng)商: Semtech
文件頁(yè)數(shù): 15/41頁(yè)
文件大?。?/td> 0K
描述: IC GPIO EXPANDER I2C 8CH 20QFN
特色產(chǎn)品: SX1508/SX1509 GPIO Expanders
標(biāo)準(zhǔn)包裝: 1
接口: I²C
輸入/輸出數(shù): 8
中斷輸出:
頻率 - 時(shí)鐘: 400kHz
電源電壓: 1.2 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 20-UFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 20-QFN-UT(3x3)
包裝: 標(biāo)準(zhǔn)包裝
包括: LED 驅(qū)動(dòng)器 / 小鍵盤(pán)引擎
其它名稱(chēng): SX1508IULDKR
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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