sx150x_89b-datasheet

ADVANCED COMMUNICATIONS & SENSING
Rev 4 – 26
th
April 2011 21 www.semtech.com
SX1508B/SX1509B
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
- 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