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SX1512BIULTRT Datasheet(PDF) 31 Page - Semtech Corporation |
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SX1512BIULTRT Datasheet(HTML) 31 Page - Semtech Corporation |
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31 / 37 page  ADVANCED COMMUNICATIONS & SENSING Rev 4 – 26 th April 2011 31 www.semtech.com SX1511B/SX1512B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine 7:3 OFF Time of IO[X]: 0 : Infinite (Single shot mode, TOff directly controlled by RegData, Cf §4.8.3) 1 - 15 : TOffX = 64 * RegOffX[7:3] * (255/ClkX) 16 - 31 : TOffX = 512 * RegOffX[7:3] * (255/ClkX) 0xXX RegOffX 0x00 2:0 OFF Intensity of IO[X] - Linear mode : IOffX = 4 x RegOff[2:0] - Logarithmic mode (fading capable IOs only) : IOffX = f(4 x RegOffX[2:0]) , Cf §4.8.5 7:5 Unused 0xXX RegTRiseX 0x00 4:0 Fade In setting of IO[X] 0 : OFF 1 - 15 : TRiseX = (RegIOnX-(4xRegOffX[2:0])) * RegTRiseX * (255/ClkX) 16 - 31 : TRiseX = 16 * (RegIOnX-(4xRegOffX[2:0])) * RegTRiseX * (255/ClkX) 7:5 Unused 0xXX RegTFallX 0x00 4:0 Fade Out setting of IO[X] 0 : OFF 1 - 15 : TFallX = (RegIOnX-(4xRegOffX[2:0])) * RegTFallX * (255/ClkX) 16 - 31 : TFallX = 16 * (RegIOnX-(4xRegOffX[2:0])) * RegTFallX * (255/ClkX) 0x69 RegHighInputB 0x00 7:0 Enables high input mode for each [input-configured] IO 0 : OFF. VIH max = 3.6V and VCCx min = 1.2V 1 : ON. VIH max = 5.5V and VCCx min = 1.65V 0x6A RegHighInputA 0x00 7:0 Enables high input mode for each [input-configured] IO 0 : OFF. VIH max = 3.6V and VCCx min = 1.2V 1 : ON. VIH max = 5.5V and VCCx min = 1.65V 0x7D RegReset 0x00 7:0 Software reset register Writing consecutively 0x12 and 0x34 will reset the device (same as POR) Always reads 0. Table 10 – SX1512B Configuration Registers Description |
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