sx8643 Semtech Corporation, sx8643 Datasheet - Page 36

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

ADVANCED COMMUNICATIONS & SENSING
5 D
5.1 Introduction
The SX8643 configuration parameters are taken from the QSM or the NVM and loaded into the SPM as explained
in the chapter ‘functional description’.
This chapter describes the details of the configuration parameters of the SX8643.
.
The SPM is split by functionality into 5 configuration sections:
The total address space of the SPM and the NVM is 128 bytes, from address 0x00 to address 0x7F.
Two types of memory addresses, data are accessible to the user.
• ‘application data’: Application dependent data that need to be configured by the user.
• ‘reserved’: Data that need to be maintained by the user to the QSM default values (i.e. when NVM is burned).
The Table 12 and Table 13 resume the complete SPM address space and show the ‘application data’ and
‘reserved’ addresses, the functional split and the default values (loaded from the QSM).
Revision 7_5, February 10
• General section: operating modes,
• Capacitive Sensors section: related to lower level capacitive sensing,
• Button: related to the conversion from sensor data towards button information,
• Mapping: related to mapping of button information towards wake-up and GPIO pins,
• GPIO: related to the setup of the GPIO pins.
ETAILED
C
ONFIGURATION DESCRIPTIONS
© 2010 Semtech Corp.
Ultra Low Power, Capacitive Button Touch Controller
36
(12 sensors) with Enhanced LED Drivers
DATASHEET
www.semtech.com
SX8643