th July 2011 34 www.semtech.com SX8654/SX8655/SX8656 H" />
參數(shù)資料
型號: SX8654IWLTRT
廠商: Semtech
文件頁數(shù): 28/62頁
文件大?。?/td> 0K
描述: IC TOUCH SCREEN 12BIT 20QFN
標(biāo)準(zhǔn)包裝: 1
類型: 電阻式,觸感驅(qū)動器
觸摸面板接口: 4,5 線
輸入數(shù)/鍵: 1 TSC,雨刷,鑰匙
分辨率(位): 12 b
評估套件: *
數(shù)據(jù)接口: I²C,串行
電壓基準(zhǔn): 內(nèi)部
電源電壓: 2.3 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-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 20-QFN(4x4)
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: SX8654IWLDKR
ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 25
th July 2011
34
www.semtech.com
SX8654/SX8655/SX8656
Haptics Enabled 4/5-Wire
Resistive Touchscreen Controller with Proximity Sensing
touchscreen is used as the proximity sensor and is being touched when the conversion is performed, the
proximity measurement result may be incorrect.
Figure 43 – Manual Mode – CONVERT Command (CHAN = Y ; PROXSCANPERIOD != 0; Pen down)
If the screen is not touched, only the proximity sensing operation is performed.
Figure 44 – Manual Mode – CONVERT Command (CHAN = Y ; PROXSCANPERIOD != 0, Pen up)
In PENDET and PENTRG mode, a proximity sensing operation will be performed regularly as defined in
PROXSCANPERIOD, but only if pen is not detected.
Figure 45 – Pen Detect Mode (RegIrqMsk[6:2] = 00011 ; PROXSCANPERIOD = 001 ie 1/TOUCHRATE)
I2C
Channel Bias
CONVERT Y
Channel Conversion
READ CHANNEL
PROX
NIRQ (RegIrqMsk[6:3]=0001)
CONVSTAT
Idle
Touch Conversion
Pen Detection
NIRQ
Pen Touch
Pen Release
I2C Read RegIrqSrc
Proximity Sensing
CONVSTAT
PENSTAT
TOUCHRATE
tick
I2C
Channel Bias
CONVERT Y
Channel Conversion
READ CHANNEL
POWDLY
Y
PROX
NIRQ (RegIrqMsk[6:3]=0001)
CONVSTAT
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