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參數(shù)資料
| 型號(hào)： | SX8652IWLTRT |
| 廠商： | Semtech |
| 文件頁數(shù)： | 11/29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 19
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
15kV ESD Low Power 4-Wire / 5-Wire Resistive
Touchscreen Controller with SPI Interface
9. Host Interface
The host interfaced is composed of a SPI bus. It performs the read/ write operations on the registers and channels data.
9.1. SPI Read/Write Registers
The WRITE command allows the host to write a single or multiple registers in the SX8652. The host can read single or
multiple registers from the SX8652 by the READ command. This is defined in Table 10.
9.2. SPI Reading Channel Data
Five channels can be sampled by the SX8652: X, Y, Z1, Z2 and AUX. They are defined in Table 12. They can be converted
in sequence with the RegChanMsk register.
The READCHAN command allows the host to read the data obtained after the channels conversion and processing.
Table 11.
Read Channels Data
The channel data are 12-bit of unsigned format which corresponds to integers between 0 and 4095. This is send on two
bytes, MSB first then LSB. A mask with the value 0x0FFF (4095) must be done to filter the four first unknown bit.
When a channel data has been transmitted, the next one is sent in the successive order: X,Y, Z1, Z2 and AUX. If a channel
has not been converted, the data is not transmitted.
When the channel data buffer gets empty, the data will carry an invalid data as explained in the channel data format.
Remark: After a conversion sequence, it is possible to read only one time the same channel.
Example: the SX8652 is set to convert X and Y. The value 0xC0 is set in RegChanMsk. The first byte read after the
READCHAN command will be X(MSB), then X(LSB), Y(MSB) and at the end Y(LSB). If the host carry on the reading, it will
get invalid data.
W/R command name
CR(7:0)
Function
7
6
5
4
3
2
1
0
WRITE(RA)
0
RA(4:0)
Write register (see Table 14 for RA)
READ(RA)
0
1
0
RA(4:0)
Read register (see Table 14 for RA)
Table 10.
W/R commands
W/R command name
CR(7:0)
Function
7
6
5
4
3
2
1
0
READCHAN
0
1
x
Read data from channel
Channel
CHAN(2:0)
Function
2
1
0
X
0
X channel
Y
0
1
Y channel
Z1
0
1
0
First channel for pressure measurement
Z2
0
1
Second channel for pressure measurement
AUX
1
0
Auxiliary channel
reserved
1
0
1
reserved
1
0
SEQ
1
Channel sequentially selected from RegChanMsk register, (see Table 15)
Table 12. Channel definition
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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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