th Oct. 2009 35 www.semtech.com SX1507/SX1508/SX1509 W" />
參數(shù)資料
型號: SX1508IULTRT
廠商: Semtech
文件頁數(shù): 29/41頁
文件大?。?/td> 0K
描述: IC GPIO EXPANDER I2C 8CH 20QFN
特色產(chǎn)品: SX1508/SX1509 GPIO Expanders
標(biāo)準(zhǔn)包裝: 1
接口: I²C
輸入/輸出數(shù): 8
中斷輸出:
頻率 - 時鐘: 400kHz
電源電壓: 1.2 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-UFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 20-QFN-UT(3x3)
包裝: 標(biāo)準(zhǔn)包裝
包括: LED 驅(qū)動器 / 小鍵盤引擎
其它名稱: SX1508IULDKR
ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 30
th Oct. 2009
35
www.semtech.com
SX1507/SX1508/SX1509
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 §4.9.3)
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 §4.9.5
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 14 – SX1509 Configuration Registers Description
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