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參數(shù)資料
| 型號(hào)： | SX1509BULTRT |
| 廠商： | Semtech |
| 文件頁數(shù)： | 11/41頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC GPIO EXPANDER I2C 16CH 28QFN |
| 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)： | 16 |
| 中斷輸出： | 是 |
| 頻率 - 時(shí)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： | 28-UFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 28-QFN-UT（4x4） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 包括： | LED 驅(qū)動(dòng)器 / 小鍵盤引擎 |
| 其它名稱： | SX1509IULDKR SX1509IULDKR-ND |
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ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 30
th Oct. 2009
19
www.semtech.com
SX1507/SX1508/SX1509
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
Assuming ClkX is not OFF, LED driver for IO[X] is enabled when RegLEDDriverEnable[X] = 1 in which case it
can operate in one of the three modes below:
Static mode (all I/Os, with or without fade in/out)
Single shot mode (blinking capable I/Os only, with or without fade in/out)
Blink mode (blinking capable I/Os only, with or without fade in/out)
t
1
0
Fade In
ON
Fade Out
OFF
0
100%
TRiseX
TFallX
TOnX
TOffX
IO[X] Intensity (PWM value)
RegData[X]
IOffX
IOnX
Figure 15 – LED Driver Overview
Each IO[X] has its own set of programmable registers (Cf §5 for more detailed information):
RegTOnX (blinking capable I/Os only): TOnX, ON time of IO[X]
RegIOnX (all I/Os): IOnX, ON intensity of IO[X]
RegOffX (blinking capable I/Os only): TOffX and IOffX, OFF time and intensity of IO[X]
RegTRiseX(breathing capable I/Os only): TRiseX, fade in time of IO[X]
RegTFallX(breathing capable I/Os only): TFallX, fade out time of IO[X]
Please note that the LED driver mode is selectable for each IO bank between linear and logarithmic. (Cf §4.9.5)
All the figures assume normal IO polarity, for inverse polarity RegData control must be inverted (does not invert
the polarity of the IO signal itself).
4.9.2
Static Mode
Only mode available for non blinking capable IOs (with Off intensity = 0), else invoked when TOnX = 0.
If the I/O doesn’t support fading the LED intensity will step directly to the IOnX/IOffX value.
RegData(X)
IOLED(X) level
Off intensity(min) determined by
register RegIOffX
On intensity(max) determined by
register RegIOnX
Fade in rate determined by
register RegTRiseX
Fade out rate determined
by register RegTFallX
Figure 16 – LED Driver Static Mode
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相關(guān)代理商/技術(shù)參數(shù) |
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| SX1509EVK | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Worlds Lowest Voltage Level |
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| SX1509QB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine |
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