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參數(shù)資料
| 型號(hào)： | SX8652IWLTRT |
| 廠商： | Semtech |
| 文件頁數(shù)： | 9/29頁 |
| 文件大小： | 0K |
| 描述： | IC TOUCH SCREEN CTRLR 14DFN |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 電阻 |
| 觸摸面板接口： | 4 線，5 線 |
| 輸入數(shù)/鍵： | 2 鍵 |
| 分辨率（位）： | 12 b |
| 數(shù)據(jù)接口： | 串行，SPI? |
| 數(shù)據(jù)速率/采樣率 (SPS，BPS)： | 74k |
| 電壓基準(zhǔn)： | 內(nèi)部 |
| 電源電壓： | 1.65 V ~ 3.7 V |
| 電流 - 電源： | 10mA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-WFDFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 14-DFN |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | SX8652IWLDKR |
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Revision V1.7/October 2010
2010 Semtech Corp.
SX8652
www.semtech.com
Page 17
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
15kV ESD Low Power 4-Wire / 5-Wire Resistive
Touchscreen Controller with SPI Interface
The processing time is the
necessary time for the SX8652 to
makes the pen detection, the
settling time (POWDLY) and the
conversion of the selected
channels. This time increases with
the number of channel selected
and the filter used. NIRQ interrupt
signal notifies the host when the
conversions are done.
The host just need to read the
channels data to release the
interrupt.
Figure 14. SPI working in AUTO mode
8.3. PENDET Mode
The PENDET mode can be used if the host only needs to know if the screen has been touched or not and take from that
information further actions. When pen detect circuitry is triggered the interrupt signal NIRQ will be generated and the status
register bit ‘PENIRQ’ will be set. The bit is cleared by reading the status register RegStat. The PENDET working is
illustrated in Figure 16.
8.4. PENTRIG Mode
The
PENTRIG
mode
offers
the
best
compromise between power consumption
and coordinate throughput.
In this mode the SX8652 will wait until a pen
is detected on the screen and then starts the
coordinate conversions. The host will be
signaled only when the screen is touched and
coordinates are available. The flowchart is
describes in Figure 16.
The coordinate rate in pen trigger mode is
determined by the speed of the host reading
the channels and the conversion times of the
channels. The host performs the minimum
number of SPI commands in this mode.
The host has to wait for the NIRQ interrupt to
make the acquisition of the data.
The SPI working is illustrated in Figure 15.
Figure 15. SPI working in PENTRIG mode
CS
DIN
DOUT
TOUCH
NIRQ
Read Channel Data CMD
Data from SX8652
Processing time
Time is 1/ RATE
CS
DIN
DOUT
TOUCH
NIRQ
Read Channel Data CMD
Data from SX8652
Conversion time
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| SX8653 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Multitouch 15kV ESD protection 4-Wire / 5-Wire Resistive Touchscreen Controller with SPI Interface |
| SX8653ICSTRT | 制造商:Semtech Corporation 功能描述: |
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| SX8653IWLTRT | 制造商:Semtech Corporation 功能描述: 制造商:Semtech Corporation 功能描述:TAPE & REEL 4/5 WIRE RESISTIVE TOUCH |
| SX8653IWLTRT1 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Multitouch 15kV ESD protection 4-Wire / 5-Wire Resistive Touchscreen Controller with SPI Interface |
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