th July 2011 47 www.semtech.com SX8657/SX8658 Haptics " />
參數(shù)資料
型號(hào): SX8657IWLTRT
廠商: Semtech
文件頁(yè)數(shù): 42/61頁(yè)
文件大?。?/td> 0K
描述: IC TOUCH SCREEN 12BIT 20QFN
標(biāo)準(zhǔn)包裝: 1
類(lèi)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(lèi)型: 表面貼裝
封裝/外殼: 20-WFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 20-QFN(4x4)
包裝: 標(biāo)準(zhǔn)包裝
其它名稱(chēng): SX8657IWLDKR
ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 25
th July 2011
47
www.semtech.com
SX8657/SX8658
Haptics Enabled 4/5-Wire
Resistive Touchscreen Controller with Proximity Sensing
Bits
Variable
Default
Description
7:4
TOUCHRATE
0000
Defines the touch coordinates acquisition rate:
0000 : OFF.
0001 : 10 cps
0010 : 20 cps
0011 : 40 cps
0100 : 60 cps
0101 : 80 cps
0110 : 100 cps
0111 : 200 cps
1000 : 300 cps
1001 : 400 cps
1010 : 500 cps
1011 : 1 kcps
1100 : 2 kcps
1101 : 3 kcps
1110 : 4 kcps
1111 : 5 kcps
Values above assume typical FOSCL, else vary accordingly.
3:0
POWDLY
0000
Defines the bias settling time for each channel’s first conversion:
0000 : 0.5 us
0001 : 1.1 us
0010 : 2.2 us
0011 : 4.4 us
0100 : 8.9 us
0101 : 17.8 us
0110 : 35.5 us
0111 : 71.0 us
1000 : 142 us
1001 : 284 us
1010 : 568 us
1011 : 1.14 ms
1100 : 2.27 ms
1101 : 4.55 ms
1110 : 9.09 ms
1111 : 18.19 ms
Values above assume typical FOSCH, else vary accordingly.
Table 12 : RegTouch0 (Addr 0x00)
Bits
Variable
Default
Description
7:5
Reserved
001
4
TSTYPE
0
Defines the type of touchscreen:
0 : 4-wire
1 : 5-wire
3:2
RPNDT
00
Defines the pen detection circuit’s pull-up resistor value:
00 : 114 kOhms
01 : 228 kOhms
10 : 57 kOhms
11 : 28 kOhms
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