参数资料
型号: SX1508IULTRT
厂商: Semtech
文件页数: 15/41页
文件大小: 0K
描述: IC GPIO EXPANDER I2C 8CH 20QFN
特色产品: SX1508/SX1509 GPIO Expanders
标准包装: 1
接口: I²C
输入/输出数: 8
中断输出:
频率 - 时钟: 400kHz
电源电压: 1.2 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 20-UFQFN 裸露焊盘
供应商设备封装: 20-QFN-UT(3x3)
包装: 标准包装
包括: LED 驱动器 / 小键盘引擎
其它名称: 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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