sx1511iultrt Semtech Corporation, sx1511iultrt Datasheet - Page 28

• Manufacturer Part Number: sx1511iultrt
• Description: World
• Manufacturer: Semtech Corporation

Addr
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x10
ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 24
Name
RegInputDisable
RegLongSlew
RegLowDrive
RegPullUp
RegPullDown
RegOpenDrain
RegPolarity
RegDir
RegData
RegInterruptMask
RegSenseHigh
RegSenseLow
RegInterruptSource
RegEventStatus
RegLevelShifter
RegClock
RegMisc
th
Feb. 2010
Default
0xFF
0xFF
0xFF
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
Bits
7:0
7:0
7:0
7:0
7:0
7:0
7:0
7:0
7:0
7:0
7:6
5:4
3:2
1:0
7:6
5:4
3:2
1:0
7:0
7:0
7:6
5:4
3:2
1:0
6:5
3:0
7
4
7
Description
Disables the input buffer of each [input-configured] IO
0 : Input buffer is enabled (input actually being used)
1 : Input buffer is disabled (input actually not being used or LED connection)
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
Enables reduced drive of the output buffer of each [output-configured] IO
0 : Reduced drive is disabled
1 : Reduced drive is enabled
Enables the pull-up for each IO
0 : Pull-up is disabled
1 : Pull-up is enabled
Enables the pull-down for each IO
0 : Pull-down is disabled
1 : Pull-down is enabled
Enables open drain operation for each [output-configured] IO
0 : Regular push-pull operation
1 : Open drain operation
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)
Configures direction for each IO.
0 : IO is configured as an output
1 : IO is configured as an input
Write: Data to be output to the output-configured IOs
Read: Data seen at the IOs, independent of the direction configured.
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
Edge sensitivity of RegData[7]
Edge sensitivity of RegData[6]
Edge sensitivity of RegData[5]
Edge sensitivity of RegData[4]
Edge sensitivity of RegData[3]
Edge sensitivity of RegData[2]
Edge sensitivity of RegData[1]
Edge sensitivity of RegData[0]
Interrupt source (from IOs set in RegInterruptMask)
0 : No interrupt has been triggered by this IO
1 : An interrupt has been triggered by this IO (an event as configured in relevant
RegSense register occured).
Writing '1' clears the bit in RegInterruptSource and in RegEventStatus
When all bits are cleared, NINT signal goes back high.
Event status of all IOs.
0 : No event has occured on this IO
1 : An event has occured on this IO (an edge as configured in relevant RegSense
register occured).
Writing '1' clears the bit in RegEventStatus and in RegInterruptSource if relevant.
If the edge sensitivity of the IO is changed, the bit(s) will be cleared automatically
Level shifter mode for IO[3] (Bank A) and IO[7] (Bank B)
Level shifter mode for IO[2] (Bank A) and IO[6] (Bank B)
Level shifter mode for IO[1] (Bank A) and IO[5] (Bank B)
Level shifter mode for IO[0] (Bank A) and IO[4] (Bank B)
Unused
Oscillator frequency (fOSC) source
00 : OFF. LED driver, keypad engine and debounce features are disabled.
01 : External clock input (OSCIN)
10 : Internal 2MHz oscillator
11 : Reserved
OSCIO pin function (Cf. §4.8)
0 : OSCIO is an input (OSCIN)
1 : OSCIO is an output (OSCOUT)
Frequency of the signal output on OSCOUT pin:
0x0 : 0Hz, permanent "0" logical level (GPO)
0xF : 0Hz, permanent "1" logical level (GPO)
Else : fOSCOUT = fOSC/(2^(RegClock[3:0]-1))
LED Driver mode for Bank B’s fading capable IOs (IO7)
0: Linear
1: Logarithmic
28
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
SX1510/SX1511/SX1512
00 : None
01 : Rising
10 : Falling
11 : Both
00 : None
01 : Rising
10 : Falling
11 : Both
www.semtech.com
00 : OFF
01 : A->B
10 : B->A
11 : Reserved