sx8645 Semtech Corporation, sx8645 Datasheet - Page 55

• Manufacturer Part Number: sx8645
• Description: Ultra Low Power, Capacitive Button And Wheel Touch Controller 12 Sensors With Enhanced Led Drivers
• Manufacturer: Semtech Corporation

ADVANCED COMMUNICATIONS & SENSING
5.6 Mapping Parameters
Revision 7_5, February 10
Mapping Parameters
Address
0x33
0x34
0x35
0x36
0x37
0x38
0x39
0x3A
0x3B
0x3C
Name
MapWakeupSize
MapWakeupValue0
MapWakeupValue1
MapWakeupValue2
MapAutoLight0
MapAutoLight1
MapAutoLight2
MapAutoLight3
MapAutoLightGrp0Msb
MapAutoLightGrp0Lsb
Bits
7:3
2:0
7:4
3:0
7:4
3:0
7:4
3:0
7:4
3:0
7:4
3:0
7:4
3:0
7:4
3:0
7
6
5
4
3
2
1
0
7
6
5
4
3
Description
Reserved
Doze -> Active wake up sequence size.
0: Any sensor event (default)
1: key0
2: key0, key1
…
6: key0, key1,…key5
7: No sensor event, only GPI or I2C cmd can exit Doze mode
Each key must be followed by a release to be validated.
Any other sensor event before the release is ignored.
Any wrong key implies the whole sequence to be entered again.
key5
key4
key3
key2
key1
key0
GPIO[7]
GPIO[6]
GPIO[5]
GPIO[4]
GPIO[3]
GPIO[2]
GPIO[1]
GPIO[0]
Reserved
Segment
Rotate Clockwise
Rotate Counter Clockwise
Btn11
Btn10
Btn9
Btn8
Btn7
Btn6
Btn5
Btn4
Btn3
Touch Controller (12 sensors) with Enhanced LED Drivers
© 2010 Semtech Corp.
55
Ultra Low Power, Capacitive Button and Wheel
Defines the sensor event associated to each key.
0x00: Btn0 (default)
0x01: Btn1
…
0x0B: Btn11
0x0C: Wheel Touch
0x0D: Rotate Counter Clockwise
0x0E: Rotate Clockwise
0x0F: Reserved
Defines the mapping between GPOs (with
Autolight ON) and sensor events.
0x00: Btn0 (default)
0x01: Btn1
…
0x0B: Btn11
0x0C: Group0 as defined by MapAutoLightGrp0
0x0D: Group1 as defined by MapAutoLightGrp1
0x0E: Rotate Counter Clockwise
0x0F: Rotate Clockwise
Several GPOs can be mapped to the same sensor
event and will be controlled simultaneously.
Defines Group0 sensor events:
0: OFF (default)
1: ON
If any of the enabled sensor events occurs the
Group0 event will occur as well.
All sensors events within the group can be
independently set except wheel event Segment
which is exclusive (ie must be the only one
enabled to be used)
DATASHEET
www.semtech.com
SX8645