th July 2011 40 www.semtech.com SX8654/SX8655/SX8656 H" />
參數(shù)資料
型號： SX8656IWLTRT
廠商： Semtech
文件頁數(shù)： 35/62頁
文件大?。?/td> 0K
描述： IC TOUCH SCREEN 12BIT 20QFN
標準包裝： 1
類型： 電阻式，觸感驅動器
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： 內部
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
供應商設備封裝： 20-QFN（4x4）
包裝： 標準包裝
其它名稱： SX8656IWLDKR
ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 25
th July 2011
40
www.semtech.com
SX8654/SX8655/SX8656
Haptics Enabled 4/5-Wire
Resistive Touchscreen Controller with Proximity Sensing
8
INTERRUPT (NIRQ)
8.1
Introduction
The purpose of the NIRQ pin is to indicate to the host (via a falling edge) when any of the events considered
being time-critical has occurred. Non time-critical events can be monitored via I2C by reading regularly the
relevant status bits.
8.2
Registers Overview
8.2.1
RegIrqMsk
This register allows the host to decide which interrupt sources he wants to monitor via the NIRQ signal. Please
note that a reset event will always trigger NIRQ falling edge whatever RegIrqMsk (Cf §10)
8.2.2
RegIrqSrc
This register indicates to the host which of the interrupt sources triggered the NIRQ signal. More than one bit
can be set if several events occurred before host reads the register.
If bit 3 is OFF, reading the register will clear it together with releasing NIRQ signal. Else, if bit 3 is ON and we are
in MAN or PENTRG mode, both register and NIRQ will be cleared only once all channel data have been read. All
ADC related operations (touch conversion, proximity conversion, pen detection) are stopped as long as all
channel data have not been read.
Bits which RegIrqMsk corresponding bits are set to 0 (ie source not monitored) will always read 0 even if the
event actually occurred.
8.2.3
RegStat
This register regroups all status information of the chip and is used by all interrupt sources to detect the relevant
events. For each bit, if the relevant block is ON its value is constantly updated, else it is set to 0. This register
update is completely independent from RegIrqMsk.
8.3
Host Procedure
-
Configure the different blocks parameters(TS, Proximity, etc)
-
Program RegIrqMsk to start monitoring what is considered to be “time-critical” events
-
Enable the blocks to start RegStat update and hence NIRQ process.
-
Each time NIRQ falling edge occurs, read RegIrqSrc to know which “time-critical” event occurred (+ read
channel data if relevant)
-
In addition, RegStat can be read anytime to get the whole picture including also what is considered to be
“non time-critical” information.
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SX8657ICSTRT 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Haptics Enabled 4/5-Wire Resistive Touchscreen Controller with Proximity Sensing
SX8657IWLTRT 功能描述:IC TOUCH SCREEN 12BIT 20QFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR)
SX8658ICSTRT 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Haptics Enabled 4/5-Wire Resistive Touchscreen Controller with Proximity Sensing
SX8658IWLTRT 功能描述:IC TOUCH SCREEN 12BIT 20QFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR)
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