sx8635 Semtech Corporation, sx8635 Datasheet - Page 73
sx8635
Manufacturer Part Number
sx8635
Description
Low Power, Capacitive Button And Wheel Touch Controller 12 Sensors With Enhanced Led Drivers And Proximity Sensing
Manufacturer
Semtech Corporation
Datasheet
1.SX8635.pdf
(81 pages)
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ADVANCED COMMUNICATIONS & SENSING
6.6.2
The SPM read can be done in any mode (Active, Doze, Sleep).
The SPM must always be read in blocks of 8 bytes. The sequence is described below:
The complete SPM can be read by repeating 16 times the cycles shown in Figure 58 using base addresses 0x00,
0x08, 0x10, …, 0x70, 0x78.
Revision 7_8, October 10
1. Set the I2C in SPM mode by writing “01” to SpmCfg[5:4] and SPM read access by writing ‘1’ to SpmCfg[3].
2. Write the SPM base address to SpmBaseAddr (The base address needs to be a value modulo 8).
3. Read the eight consecutive bytes from I2C address 0, 1, 2, …7
4. Terminate by writing “000” to SpmCfg[5:3].
SPM Read Sequence
(12 sensors) with Enhanced LED Drivers and Proximity Sensing
Figure 58: SPM Read Sequence
© 2010 Semtech Corp.
Low Power, Capacitive Button and Wheel Touch Controller
73
DATASHEET
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SX8635
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