STV82X8 datasheet(125/157 Pages) STMICROELECTRONICS

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STV82x8

On beeper STOP, the register 0xF2 is reset to 0. Take care to set bit[2:1] on each BEEPER_ON

action.

BEEPER_MODE

Beeper Control

BEEPER_FREQ_VOL

Beeper Frequency and Volume Settings

Address: F3h

Type: R/W

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

BEEPER_DECAY[2:0]

BEEPER_DURATION[1:0]

BEEPER_CO

NTINUOUS

BEEPER_PATH

Bit Name

Reset

Function

BEEPER_DECAY [

2:0]

000

Control the decay of the envelope of the Beeper sound:

000:

Short Decay (sounds dry)

...

111:

Very Long Decay (sounds wet)

BEEPER_DURATIO

N [1:0]

Define Beeper Duration when BEEPER_CONTINUOUS is set to 0:

00: 0.1 sec.

01: 0.25 sec.

10: 0.5 sec.

11: 1 sec.

BEEPER_CONTIN

UOUS

Set Beeper Pulse Mode

Pulse mode selected, the BEEPER_ON is automaticaly reset to 0.

Continuous mode selected, the BEEPER_ON must be set to 0 to stop the beeper sound.

BEEPER_PATH [

1:0]

Set the output channels when beeper is active

00: no channels.

01: Loudspeakers only.

10: Headphone only.

11: Loudspeakers and Headphone selected.

Address: F4h

Type: R/W

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

BEEP_FREQ[2:0]

BEEP_VOL[4:0]

Bit Name

Reset

Function

BEEP_FREQ[2:0]

011

Defines the frequency of the beeper tone from 62.5 Hz to 8 kHz in octaves

000:

62.5 Hz

100:

1 kHz

001:

125 Hz

101:

2 kHz

010:

250 Hz

110:

4 kHz

011:

500 Hz (Default)

111:

8 kHz

STV82X8 Datasheet(PDF) 125 Page - STMicroelectronics

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