sx8660 Semtech Corporation, sx8660 Datasheet - Page 70

• Manufacturer Part Number: sx8660
• Description: Ultra Low Power, Capacitive Button Touch Controller 8 Sensors With Enhanced Led Drivers And Analog Output
• Manufacturer: Semtech Corporation

ADVANCED COMMUNICATIONS & SENSING
6.6.1
The SPM must always be written in blocks of 8 bytes. The sequence is described below:
The complete SPM can be written by repeating 16 times the cycles shown in Figure 56 using base addresses
0x00, 0x08, 0x10,…0x70, 0x78.
Once the SPM write sequence is actually applied, the INTB pin will be asserted. The host clears the interrupt by
reading any I2C register. At the same time the bit GenStatMsb[6], indicating the SPM write is done, will be
cleared.
Revision v2.3, June 2010
1. Set the I2C in SPM mode by writing “01” to SpmCfg[5:4] and SPM write access by writing ‘0’ to SpmCfg[3].
2. Write the SPM base address to SpmBaseAddr (The base address needs to be a value modulo 8).
3. Write the eight consecutive bytes to I2C address 0, 1, 2, …7
4. Terminate by writing “000” to SpmCfg[5:3].
SPM Write Sequence
Figure 56: SPM write sequence
© 2010 Semtech Corp.
(8 sensors) with Enhanced LED Drivers and Analog Output
Ultra Low Power, Capacitive Button Touch Controller
70
DATASHEET
www.semtech.com
SX8660