sx8643 Semtech Corporation, sx8643 Datasheet - Page 49

• Manufacturer Part Number: sx8643
• Description: Ultra Low Power, Capacitive Button Touch Controller 12 Sensors With Enhanced Led Drivers
• Manufacturer: Semtech Corporation

ADVANCED COMMUNICATIONS & SENSING
MapWakeupSize
The number of keys defining the wakeup sequence can be set from 1 to 6.
If the size is set to 0 then wakeup is done on any sensor event.
if the size is set to 6 then wakeup is done only by GPI or an I2C command.
MapWakeupValue0, MapWakeupValue1, MapWakeupValue2
For the wakeup sequence Btn2 -> Btn5 -> Btn6 ->Btn0 the required register settings are:
MapAutoLight0, MapAutoLight1, MapAutoLight2, MapAutoLight3
MapAutoLightGrp0Msb, MapAutoLightGrp0Lsb, MapAutoLightGrp1Msb, MapAutoLightGrp1Lsb
Revision 7_5, February 10
Mapping Parameters
Address
0x3D
0x3E
These registers define the mapping between the GPO pins
will control its ON/OFF state.
The mapping can be done to a specific sensor event but also on groups (in this case any sensor event in the
group will control the GPO).
Table 20 defines for each selectable sensor event, which action will trigger corresponding GPO to switch ON
or OFF.
- MapWakeupSize set to 0x04,
- key0 = 0x2
- key1 = 0x5
=> MapWakeupValue2 set to 0x52
- key2 = 0x6
- key3 = 0x0
=> MapWakeupValue2 set to 0x06
Name
MapAutoLightGrp1Msb
MapAutoLightGrp1Lsb
Bits
7:4
3
2
1
0
7
6
5
4
3
2
1
0
Description
Reserved
Btn11
Btn10
Btn9
Btn8
Btn7
Btn6
Btn5
Btn4
Btn3
Btn2
Btn1
Btn0
Table 19
© 2010 Semtech Corp.
Ultra Low Power, Capacitive Button Touch Controller
Mapping Parameters
49
(with Autolight ON)
(12 sensors) with Enhanced LED Drivers
Defines Group1 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.
and the sensor information which
DATASHEET
www.semtech.com
SX8643