sx8636 Semtech Corporation, sx8636 Datasheet - Page 49

• Manufacturer Part Number: sx8636
• Description: Low Power, Capacitive Button Touch Controller 8 Sensors With Enhanced Led Drivers And Proximity Sensing
• 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 (may be required if proximity sensing
is enable, see § 3.17 for more details).
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, September 10
Mapping Parameters
Address
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.
Examples:
- If GPO[0] should change state accordingly to Btn4 then MapAutoLight3[3:0] should be set to 0x04.
- If GPO[0] should change state accordingly to Btn0 or Btn1 then Group0 can be used as following:
- MapAutoLight3[3:0] should be set to 0x0C (ie Group0).
- MapAutoLightGrp0 should be set to 0x0003 (ie Btn0 or Btn1)
- MapWakeupSize set to 0x04,
- key0 = 0x2
- key1 = 0x5
=> MapWakeupValue2 set to 0x52
- key2 = 0x6
- key3 = 0x0
=> MapWakeupValue2 set to 0x06
Name
MapAutoLight
BtnX
Table 20
Bits
4
3
2
1
0
Autolight Mapping, Sensor Information
Description
Btn4
Btn3
Btn2
Btn1
Btn0
Table 19
© 2010 Semtech Corp.
Low Power, Capacitive Button Touch Controller (8 sensors)
Mapping Parameters
GPO ON
Touch
with Enhanced LED Drivers and Proximity Sensing
49
(with Autolight 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.
GPO OFF
Release
and the sensor information which
DATASHEET
www.semtech.com
SX8636