SX8661 datasheet(61/88 Pages) SEMTECH

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ADVANCED COMMUNICATIONS & SENSING

DATASHEET

Revision v3.2, January 2011

www.semtech.com

SX8661

Low Power, Capacitive Button Touch and Proximity Controller

(8 sensors) with LED Drivers and Analog Output

5.7

Buzzer Parameters

Buzzer

Parameters

Address

Name

Bits

Description

7:6

Defines the phase 1 duration.

0x00: ~ 5ms

0x01: ~ 10ms

0x02: ~ 15ms (default)

0x03: ~ 30ms

5:4

Defines the phase 2 duration.

0x00: ~ 5ms

0x01: ~ 10ms

0x02: ~ 15ms (default)

0x03: ~ 30ms

Defines the buzzer idle level (BuzzerLevelIdle).

0x0: min level (0V), (default)

0x1: max level (VDD)

0x37

BuzzerCfg

2:0

Defines the buzzer pwm prescaler value.

Default: 0x04

0x38

BuzzerFreqPhase1

7:0

Defines the frequency for the first phase of the buzzer.

freq ≈ 4MHz /(2^prescaler * BuzzerFreqPhase1)

Default: 0x40 (4KHz)

0x39

BuzzerFreqPhase2

7:0

Defines the frequency for the second phase of the buzzer.

freq ≈ 4MHz /(2^prescaler * BuzzerFreqPhase2)

Default: 0x20 (8KHz)

0x3A

Reserved

7:0

Reserved (0x00)

Table 23

Buzzer Parameters

The buzzer parameters are described in section 3.7.

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