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SX1512BIULTRT Datasheet(PDF) 28 Page - Semtech Corporation |
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SX1512BIULTRT Datasheet(HTML) 28 Page - Semtech Corporation |
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28 / 37 page 
ADVANCED COMMUNICATIONS & SENSING Rev 4 – 26 th April 2011 28 www.semtech.com SX1511B/SX1512B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine Addr Name Default Bits Description 0x00 RegInputDisableB 0x00 7:0 Disables the input buffer of each IO 0 : Input buffer is enabled (input actually being used) 1 : Input buffer is disabled (input actually not being used or LED connection) 0x01 RegInputDisableA 0x00 7:0 Disables the input buffer of each IO 0 : Input buffer is enabled (input actually being used) 1 : Input buffer is disabled (input actually not being used, LED connection) 0x02 RegLongSlewB 0x00 7:0 Enables increased slew rate of the output buffer of each [output-configured] IO 0 : Increased slew rate is disabled 1 : Increased slew rate is enabled 0x03 RegLongSlewA 0x00 7:0 Enables increased slew rate of the output buffer of each [output-configured] IO 0 : Increased slew rate is disabled 1 : Increased slew rate is enabled 0x04 RegLowDriveB 0x00 7:0 Enables reduced drive of the output buffer of each [output-configured] IO 0 : Reduced drive is disabled 1 : Reduced drive is enabled, IOL specifications are divided by 2. 0x05 RegLowDriveA 0x00 7:0 Enables reduced drive of the output buffer of each [output-configured] IO 0 : Reduced drive is disabled 1 : Reduced drive is enabled, IOL specifications are divided by 2. 0x06 RegPullUpB 0x00 7:0 Enables the pull-up for each IO 0 : Pull-up is disabled 1 : Pull-up is enabled 0x07 RegPullUpA 0x00 7:0 Enables the pull-up for each IO 0 : Pull-up is disabled 1 : Pull-up is enabled 0x08 RegPullDownB 0x00 7:0 Enables the pull-down for each IO 0 : Pull-down is disabled 1 : Pull-down is enabled 0x09 RegPullDownA 0x00 7:0 Enables the pull-down for each IO 0 : Pull-down is disabled 1 : Pull-down is enabled 0x0A RegOpenDrainB 0x00 7:0 Enables open drain operation for each [output-configured] IO 0 : Regular push-pull operation 1 : Open drain operation 0x0B RegOpenDrainA 0x00 7:0 Enables open drain operation for each [output-configured] IO 0 : Regular push-pull operation 1 : Open drain operation 0x0C RegPolarityB 0x00 7:0 Enables polarity inversion for each IO 0 : Normal polarity : RegData[x] = IO[x] 1 : Inverted polarity : RegData[x] = !IO[x] (for both input and output configured IOs) 0x0D RegPolarityA 0x00 7:0 Enables polarity inversion for each IO 0 : Normal polarity : RegData[x] = IO[x] 1 : Inverted polarity : RegData[x] = !IO[x] (for both input and output configured IOs) 0x0E RegDirB 0xFF 7:0 Configures direction for each IO. 0 : IO is configured as an output 1 : IO is configured as an input 0x0F RegDirA 0xFF 7:0 Configures direction for each IO. 0 : IO is configured as an output 1 : IO is configured as an input 0x10 RegDataB 0xFF 7:0 Write: Data to be output to the output-configured IOs Read: Data seen at the IOs, independent of the direction configured. 0x11 RegDataA 0xFF 7:0 Write: Data to be output to the output-configured IOs Read: Data seen at the IOs, independent of the direction configured. 0x12 RegInterruptMaskB 0xFF 7:0 Configures which [input-configured] IO will trigger an interrupt on NINT pin 0 : An event on this IO will trigger an interrupt 1 : An event on this IO will NOT trigger an interrupt 0x13 RegInterruptMaskA 0xFF 7:0 Configures which [input-configured] IO will trigger an interrupt on NINT pin 0 : An event on this IO will trigger an interrupt 1 : An event on this IO will NOT trigger an interrupt 7:6 Edge sensitivity of RegData[15] 5:4 Edge sensitivity of RegData[14] 3:2 Edge sensitivity of RegData[13] 0x14 RegSenseHighB 0x00 1:0 Edge sensitivity of RegData[12] 00 : None 01 : Rising 10 : Falling 11 : Both 7:6 Edge sensitivity of RegData[11] 5:4 Edge sensitivity of RegData[10] 3:2 Edge sensitivity of RegData[9] 0x15 RegSenseLowB 0x00 1:0 Edge sensitivity of RegData[8] 00 : None 01 : Rising 10 : Falling 11 : Both 7:6 Edge sensitivity of RegData[7] 5:4 Edge sensitivity of RegData[6] 3:2 Edge sensitivity of RegData[5] 0x16 RegSenseHighA 0x00 1:0 Edge sensitivity of RegData[4] 00 : None 01 : Rising 10 : Falling 11 : Both 7:6 Edge sensitivity of RegData[3] 0x17 RegSenseLowA 0x00 5:4 Edge sensitivity of RegData[2] 00 : None 01 : Rising 10 : Falling |
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