SX8663 datasheet(58/64 Pages) SEMTECH

Part #	SX8663

Description	Capacitive Button Matrix (up to 36) and Proximity Controller with Individual LED Drivers and Buzzer Output

PDF	64 Pages

Scroll/Zoom	100%

Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

Logo

58 / 64 page

ADVANCED COMMUNICATIONS & SENSING

Rev5 4

th August 2011

www.semtech.com

SX8663

Capacitive Button Matrix (up to 36) and Proximity Controller

with Individual LED Drivers and Buzzer Output

6.6.1

SPM Write Sequence

The SPM must always be written in blocks of 8 bytes. The sequence is described below:

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].

Figure 51

SPM write sequence

The complete SPM can be written by repeating 16 times the cycles shown in Figure 51 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.

SX8663 Datasheet(PDF) 58 Page - Semtech Corporation