SX1509BIULTRT Semtech, SX1509BIULTRT Datasheet - Page 29

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

0xXX
0x2A
0x7D
ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 30
RegTFallX
RegHighInput
RegReset
th
Oct. 2009
Table 12 – SX1508 Configuration Registers Description
0x00
0x00
0x00
7:5
4:0
7:0
7:0
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)
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
Software reset register
Writing consecutively 0x12 and 0x34 will reset the device (same as POR).
Always reads 0.
29
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
SX1507/SX1508/SX1509
www.semtech.com