th July 2011 44 www.semtech.com SX8654/SX8655/SX8656 H" />
參數(shù)資料
型號(hào)： SX8654IWLTRT
廠商： Semtech
文件頁(yè)數(shù)： 39/62頁(yè)
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(dòng)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(píng)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
44
www.semtech.com
SX8654/SX8655/SX8656
Haptics Enabled 4/5-Wire
Resistive Touchscreen Controller with Proximity Sensing
The correct sampling of the screen by the chip and the host I2C bus traffic are events that might occur
simultaneously. The chip will synchronize these events by the use of clock stretching if that is required. The
stretching occurs directly after the last received command bit (see figure above).
11.4
Read Register
The I2C read register sequence is given in figure below. After the start condition [S], the chip slave address (SA)
is sent, followed by an eighth bit (W=‘0’) indicating a write. The chip then acknowledges [A] that it is being
addressed, and the host responds with a CR byte consisting in ‘01’ followed by the register address (RA). The
chip acknowledges [A] and the host sends the repeated start Condition [Sr]. Once again, the chip slave address
(SA) is sent, followed by an eighth bit (R=‘1’) indicating a read. The chip responds with an acknowledge [A] and
the data byte (RD0). If the host needs to read more data it will acknowledge [A] and the chip will send the next
data byte (RD1). This sequence will be repeated until the host terminates the transfer with a NACK [N] followed
by a stop condition [P].
Figure 53 – I2C Read Register
The register address increments automatically when successive data bytes (RD1...RDn) are read by the host.
The correct sampling of the screen by the chip and the host I2C bus traffic are events that might occur
simultaneously. The chip will synchronize these events by the use of clock stretching if that is required. The
stretching occurs directly after the last received command bit (see figure above).
11.5
Write Command (Touchscreen Interface)
The I2C write command sequence is given in figure below. After the start condition [S], the chip slave address
(SA) is sent, followed by an eighth bit (W=‘0’) indicating a write. The chip then acknowledges [A] that it is being
addressed, and the host responds with a CR byte consisting in Command(7:0) (see table below). The chip
acknowledges [A] and the host sends a stop [P].
Figure 54 – I2C Write Command
The sampling of the screen by the chip and the host I2C bus traffic are events that might occur simultaneously.
The chip will synchronize these events by the use of clock stretching if that is required. The stretching occurs
directly after the last received command bit (see figure above).
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SX8655IWLTRT 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(biāo)準(zhǔn)包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評(píng)估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準(zhǔn):- 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(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
SX8656ICSTRT 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
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SX8657 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
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