th July 2011 50 www.semtech.com SX8657/SX8658 Haptics " />
參數(shù)資料
型號(hào)： SX8658IWLTRT
廠商： Semtech
文件頁(yè)數(shù)： 46/61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： SX8658IWLDKR
ADVANCED COMMUNICATIONS & SENSING
Rev 1 – 25
th July 2011
50
www.semtech.com
SX8657/SX8658
Haptics Enabled 4/5-Wire
Resistive Touchscreen Controller with Proximity Sensing
Bits
Variable
Default
Description
7:0
HAPTAMP
0x00
Defines the haptics output polarity and level in I2C mode i.e.
AmplitudeCode (Cf. §6) :
0xFF : +127 (Max positive)
…
0x81 : +1
0x80 : +0
0x00 : -0
0x01 : -1
…
0x7F : -127 (Max negative)
HAPTAMP[7] gives the sign of AmplitudeCode (1=>+;0=>-) while
HAPTAMP[6:0] give its magnitude.
Table 19 : RegHapt2 (Addr 0x07)
Bits
Variable
Default
Description
7:5
HAPTBW
100
Defines the haptics low-pass filter cut off frequency (Hz):
000 : OFF. No filtering.
001 : ~210 * SamplingFreq / 100
010 : ~280 * SamplingFreq / 100
011 : ~425 * SamplingFreq / 100
100 : ~565 * SamplingFreq / 100
101 : ~700 * SamplingFreq / 100
110 : ~850 * SamplingFreq / 100
111 : ~980 * SamplingFreq / 100
SamplingFreq is VMOUT_Freq in LRA mode and MIN_Freq (PWM) or
FOSCL (I2C) in ERM mode (Cf. §6)
4
HAPTHZ
0
Sets MOUTP and MOUTN to high impedance (HZ):
0 : Normal
1 : HZ
3
HAPTSHORTPROT
0
Disables short-circuit protection:
0 : ON . A short-circuit event will automatically stop haptics operation.
1 : OFF. A short-circuit event will not stop haptics operation.
In both cases HAPTSHORTSTAT is still updated (and hence an
interrupt can still be generated if needed)
2:0
HAPTTIMERMSB
000
Defines the haptics timer overflow value used to generate the LRA’s
128 or 256 multiple frequency from MIN.
Table 20 : RegHapt3 (Addr 0x08)
Bits
Variable
Default
Description
7:0
HAPTTIMERLSB
0x00
Defines the haptics timer overflow value used to generate the LRA’s
128 or 256 multiple frequency from MIN.
HAPTTIMER[9:0] values below 8 (ie 0-7) are reserved.
Table 21 : RegHapt4 (Addr 0x09)
Bits
Variable
Default
Description
7:0
Reserved
0x00
Table 22 : RegHapt5 (Addr 0x0A)
Bits
Variable
Default
Description
7
PROXRAWFILTSEL
0
Defines the proximity raw filtering range for PROXRAWFILT :
0 : Fast
1 : Slow
6
PROXIRQSEL
0
Defines the function of bits 5 of RegIrqMsk and RegIrqSrc.
0 : ProxFar
1 : ProxConvDone
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