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參數(shù)資料
| 型號(hào)： | SX8652IWLTRT |
| 廠商： | Semtech |
| 文件頁數(shù)： | 17/29頁 |
| 文件大?。?/td> | 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 24
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
15kV ESD Low Power 4-Wire / 5-Wire Resistive
Touchscreen Controller with SPI Interface
10. Application Information
This section describes in more detail application oriented data.
10.1. Acquisition Setup
Prior to an acquisition, the SX8652 can be setup by writing the control registers. Registers are written by issuing the
register write command. They can be read by issuing the read command. Please refer to the section [9.7].
10.2. Channel Selection
The SX8652 can be setup to start a single channel conversion or to convert several channels in sequence. For a single
conversion, the channel to be converted is determined from the CHAN(2:0) field in the command word (defined in
Table 12).
Several channels defined in RegChanMsk can be acquired sequentially by setting the CHAN(2:0) field to SEQ. The
channels will be sampled in the order X, Y, Z1, Z2, AUX.
10.3. Noise Reduction
A noisy environment can decrease the performance of the controller. For example, an LCD display located just under the
touch screen can adds a lot of noise on the high impedance A/D converter inputs.
10.3.1. POWDLY
In order to perform correct coordinates acquisition properly, some time must be given for the touch screen to reach a
proper level. It is a function of the PCB trace resistance connecting the SX8652 to the touchscreen and also the
RegChanMsk
7
1
XCONV
0: no sample
1: Sample X channel
6
1
YCONV
0: no sample
1: Sample Y channel
5
0
Z1CONV
0: no sample
1: Sample Z1 channel
4
0
Z2CONV
0: no sample
1: Sample Z2 channel
3
0
AUXCONV
0: no sample
1: Sample AUX channel
0
reserved
0
reserved
0
reserved
RegStat
Host writing to this register is ignored.
7
0
CONVIRQ
0: no IRQ pending
1: Conversion sequence finished
IRQ is cleared by the channel data read command
6
0
PENIRQ
Operational in pen detect mode
0: no IRQ pending
1: Pen detected IRQ pending
IRQ is cleared by the RegStat reading
5
1
RSTEVENT A reset event has occurred
4:0
00000
reserved
RegSoftReset
7:0
0x00
Writing 0xDE to this register reset the SX8652
Any other data will not affect the SX8652
Register
Bit Default
Description
Table 15. SX8652 Register
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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: |
| SX8653ICSTRT1 | 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 |
| 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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