SX8657IWLTRT Semtech, SX8657IWLTRT Datasheet - Page 49

• Manufacturer Part Number: SX8657IWLTRT
• Description: 58T7570
• Manufacturer: Semtech

Specifications of SX8657IWLTRT

• Controller Type: Resistive Touch Screen
• Ic Interface Type: I2C, Serial
• Supply Voltage Range: 2.3V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• No. Of Pins: 20
• Resolution (bits): 12bit

ADVANCED COMMUNICATIONS & SENSING
Bits
7:6
5:3
2
1
0
Bits
Rev 1 – 25
3:0
HAPTGAIN
Variable
Reserved
HAPTSQUELCH
TEMPWRNIRQEDG
TEMPALRMIRQEDG
TEMPALWAYSON
Variable
th
July 2011
Default
Default
0000
000
00
0
0
0
Table 17 : RegHapt0 (Addr 0x05)
Table 18 : RegHapt1 (Addr 0x06)
Defines the haptics output gain:
0000 : 1
0001 : ~1.17
0010 : ~1.34
0011 : ~1.51
0100 : ~1.67
0101 : ~1.84
0110 : ~2.01
0111 : ~2.18
1000 : ~2.35
1001 : ~2.52
1010 : ~2.69
1011 : ~2.86
1100 : ~3.03
1101 : ~3.20
1110 : ~3.37
1111 : ~3.53
Exact formula is 1 + Code * 0.169
Description
Description
Defines the Haptics squelch, i.e. the range of AmplitudeCode
(HAPTAMP or MIN duty cycle equivalent, Cf. § 6) which will generate a
0V output (VMOUT):
000 : OFF. No squelch.
001 : -1 < AmplitudeCode < +1 (ie. AmplitudeCode = 0)
010 : -2 < AmplitudeCode < +2
011 : -4 < AmplitudeCode < +4
100 : -8 < AmplitudeCode < +8
101 : -16 < AmplitudeCode < +16
110 : -32 < AmplitudeCode < +32
111 : -64 < AmplitudeCode < +64
Enables TempWrnIrq to be generated when the chip temperature gets
below the alarm threshold :
0 : OFF. TempWrnIrq generated only when the chip temperature gets
above the alarm threshold.
1 : ON. TempWrnIrq generated both when the chip temperature gets
above and below the alarm threshold.
Enables TempAlrmIrq to be generated when the chip temperature gets
below the alarm threshold :
0 : OFF. TempAlrmIrq generated only when the chip temperature gets
above the alarm threshold.
1 : ON. TempAlrmIrq generated both when the chip temperature gets
above and below the alarm threshold.
Enables the temperature monitoring even when no operation (touch,
proximity, haptics) is enabled:
0 : OFF
1 : ON
Resistive Touchscreen Controller with Proximity Sensing
49
SX8657/SX8658
Haptics Enabled 4/5-Wire
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