sx8639 Semtech Corporation, sx8639 Datasheet - Page 51
sx8639
Manufacturer Part Number
sx8639
Description
Low Power, Capacitive Button And Wheel Touch Controller 8 Sensors With Enhanced Led Drivers And Proximity Sensing
Manufacturer
Semtech Corporation
Datasheet
1.SX8639.pdf
(81 pages)
- Current page: 51 of 81
- Download datasheet (2Mb)
ADVANCED COMMUNICATIONS & SENSING
5.5 Wheel Parameters
Revision 7_8, September 10
Wheel Parameters
Address
0x27
0x28
0x29
0x2B
0x2C
0x2D
0x2E
0x2F
0x30
Name
WhlCfg
WhlStuckAtTimeout
WhlHysteresis
WhlNormMsb
WhlNormLsb
WhlAvgThresh
WhlCompNegThresh
WhlCompNegCntMax
WhlRotateThresh
Bits
7:4
3:2
1:0
7:0
7:0
7:0
7:0
7:0
7:0
7:0
7:0
Description
Reserved
Defines the number of samples at the scan period for determining a release
00: OFF, use incoming sample (default)
01: 2 samples debounce
10: 3 samples debounce
11: 4 samples debounce
Defines the number of samples at the scan period for determining a touch
00: OFF, use incoming sample (default)
01: 2 samples debounce
10: 3 samples debounce
11: 4 samples debounce
Defines the stuck at timeout.
0x00: OFF (default)
0x01: 1 second
…
0xFF: 255 seconds
Defines the Wheel Touch/Release Hysteresis.
0x00: 0
0x01: 4
…
0x03: 12 (default)
…
0xFF: 1020
Wheel Norm Msb
Wheel Norm Lsb
Defines the positive threshold for disabling the processing filter averaging.
If ticks are above the threshold, then the averaging is suspended
0x00: 0
0x01: 4
…
0x50: 320 (default)
…
0xFF: 1020
Defines the negative offset compensation threshold.
0x00: 0
0x01: 4
…
0x50: 320 (default)
…
0xFF: 1020
Defines the number of ticks (below the negative offset compensation threshold)
which will initiate an offset compensation.
0x00: Reserved
0x01: 1 sample (default)
…
0xFF: 255 samples
Defines the threshold for detecting a rotate clockwise or counter clockwise.
The threshold is a percentage of the maximum wheel position.
0x00: 0%
…
0x02: 2% (default)
(8 sensors) with Enhanced LED Drivers and Proximity Sensing
© 2010 Semtech Corp.
Low Power, Capacitive Button and Wheel Touch Controller
51
Defines the 16 bits wheel norm (default 0x0200)
DATASHEET
www.semtech.com
SX8639
Related parts for sx8639
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
HIGH VOLTAGE CAPACITORS MONOLITHIC CERAMIC TYPE
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
EZ1084CM5.0 AMP POSITIVE VOLTAGE REGULATOR
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
3.0 AMP LOW DROPOUT POSITIVE VOLTAGE REGULATORS
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
RailClamp Low Capacitance TVS Diode Array
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet: