SX1509BIULTRT Semtech, SX1509BIULTRT Datasheet - Page 25

• Manufacturer Part Number: SX1509BIULTRT
• Description: 16-chan GPIO W/ LED Driver & Keypad Engine (I2C)
• Manufacturer: Semtech

0x0E
0x0F
0xXX
0xXX
0xXX
0xXX
0xXX
0x7D
0x10
0x11
ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 30
RegMisc
RegLEDDriverEnable
RegDebounceConfig
RegDebounceEnable
RegTOnX
RegIOnX
RegOffX
RegTRiseX
RegTFallX
RegReset
th
Oct. 2009
0xX0
0xX0
0xFF
Table 10 – SX1507 Configuration Registers Description
0x00
0x00
0x00
0x00
0x00
0x00
0x00
6:4
7:4
3:0
7:3
2:0
7:4
3:0
7:5
4:0
7:0
7:3
2:0
7:5
4:0
7:5
4:0
7:0
7
3
2
1
0
Unused
Frequency of the LED Driver clock ClkX of all IOs:
0 : OFF. LED driver functionality is disabled for all IOs.
Else : ClkX = fOSC/(2^(RegMisc[6:4]-1))
LED Driver mode for Bank A ‘s fading capable IOs (IO1-3)
0: Linear
1: Logarithmic
NRESET pin function when externally forced low (Cf. §4.4.1 and §4.9.5).
0: Equivalent to POR
1: Reset PWM/Blink/Fade counters (not user programmed values)
This bit is can only be reset manually or by POR, not by NRESET.
Auto-increment register address (Cf. §4.5)
0: ON. When several consecutive data are read/written, register address is incremented.
1: OFF. When several consecutive data are read/written, register address is kept fixed.
Autoclear NINT on RegData read (Cf. §4.7)
0: ON. RegInterruptSource is also automatically cleared when RegData is read.
1: OFF. RegInterruptSource must be manually cleared, either directly or via
RegEventStatus.
Unused
Enables LED Driver for each [output-configured] IO
0 : LED Driver is disabled
1 : LED Driver is enabled
Unused
Debounce time (Cf. §4.6.1)
000: 0.5ms x 1MHz/fOSC
001: 1ms x 1MHz/fOSC
010: 2ms x 1MHz/fOSC
011: 4ms x 1MHz/fOSC
100: 8ms x 1MHz/fOSC
101: 16ms x 1MHz/fOSC
110: 32ms x 1MHz/fOSC
111: 64ms x 1MHz/fOSC
Unused
Enables debouncing for each [input-configured] IO
0 : Debouncing is disabled
1 : Debouncing is enabled
Unused
ON Time of IO[X]:
0 : Infinite (Static mode, TOn directly controlled by RegData, Cf §4.9.2)
1 - 15 : TOnX = 64 * RegTOnX * (255/ClkX)
16 - 31 : TOnX = 512 * RegTOnX * (255/ClkX)
ON Intensity of IO[X]
- Linear mode : IOnX = RegIOnX
- Logarithmic mode (fading capable IOs only) : IOnX = f(RegIOnX) , Cf §4.9.5
OFF Time of IO[X]:
0 : Infinite (Single shot mode, TOff directly controlled by RegData, Cf §4.9.3)
1 - 15 : TOffX = 64 * RegOffX[7:3] * (255/ClkX)
16 - 31 : TOffX = 512 * RegOffX[7:3] * (255/ClkX)
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 §4.9.5
Unused
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)
Unused
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)
Software reset register
Writing consecutively 0x12 and 0x34 will reset the device (same as POR).
Always reads 0.
25
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
SX1507/SX1508/SX1509
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