SC14WAMDECT datasheet(14/37 Pages) RENESAS

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Datasheet

Revision 3.1

05-Jan-2022

CFR0011-120-00-FM Rev 5

14 of 36

SC14WAMDECT SF

Wireless Audio Module

FINAL

5.1 PUBLIC ADDRESS MODE

In Public Address mode one or two battery operated

wireless microphones (PP, transmitter) connect to a

standalone loudspeaker (FP, receiver).

5.1.1 Microphone (PP)

The wireless microphone can be a standard handheld

microphone or a belt pack with a lavalier microphone

attached. The SC14WAMDECT SF module (transmit-

ter, PP) can be integrated into the microphone.

The microphone or belt pack should have three LEDs

(two red and one green), a Power On button and two

optional pushbuttons for volume up and down.

5.1.2 Loudspeaker (FP)

The SC14WAMDECT SF module (receiver, FP) can be

integrated directly into a loudspeaker or an amplifier. In

the use case described below it is assumed that the

module is built into a simple loudspeaker with inte-

grated amplifier.

The loudspeaker can be mains or battery operated.

The loudspeaker should have three status LEDs (two

red and one green) and one pushbutton, which acts as

both Power On and Registration button.

The Power On button will normally be connected to the

power switch of the loudspeaker/amplifier. The Regis-

tration button is used for pairing of a wireless micro-

phone with the loudspeaker.

5.1.3 LED indication

A green LED and two red LEDs indicate the status of

the module. The indications apply for both FP and PP.

Pins LED_RED1 and LED_RED2 indicate the status of

microphones 1 and 2. See Table 6.

5.1.4 Volume control

The microphone can have optional Volume Up and Vol-

ume Down keys. The volume control range is:

• Microphone volume: 0 dB to +30 dB, 2 dB/step,

default value: +10 dB.

• Loudpeaker volume: fixed at 0 dB.

To mute the microphone press and release the Power

On button (toggle).

To mute both microphones from the loudspeaker side

(FP), press and hold the Volume Up key. The audio will

be muted as long as this key is pressed.

5.1.5 Accessory input/output

The accessory input (pin ACC_IN) for the microphone

(PP) and the accessory output (pin ACC_OUT) for the

loudspeaker (FP) are supported as shown in Table 7.

Pin ACC_OUT could be used to control an external

audio amplifier to drive large loudspeakers.

5.2 TOUR GUIDE MODE

In Tour Guide mode a microphone (FP, transmitter)

broadcasts to up to 128 headphones (PP, receiver).

After pairing to the FP, all headphones will receive the

same audio signal from the microphone.

5.2.1 Microphone (FP)

The microphone is the audio transmitter and should

include two LEDs (red and green), a Power On button

and two optional pushbuttons for volume up and down.

The SC14WAMDECT SF module (transmitter, FP) can

be integrated into the microphone.

5.2.2 Headphone (PP)

The SC14WAMDECT SF module (receiver, PP) is nor-

mally built into the headphone and directly connected

to the loudspeaker.

5.2.3 LED indication

A green and a red LED (pin LED_RED1) indicate the

status of the module. The indications apply for both FP

and PP. Pin LED_RED2 is not used. See Table 6.

5.2.4 Volume control

The headphone can have optional Volume Up and

Down pushbuttons. The volume control range is:

• Microphone volume: fixed at +10 dB.

• Loudspeaker volume: -12 dB to +2 dB, 2 dB/step,

default value: +2 dB.

To mute the loudspeaker (receiver) press and release

the Power On button (toggle). To mute the microphone

(transmitter) press and hold the Volume Up key. The

audio will be muted as long as this key is pressed.

Table 6: LED status indications

LED_GRN

LED_REDx Description

OFF

module OFF

OFF

module ON, no link

OFF

module ON, link good

OFF

flash 0.5 s

mute (MIC or SPEAKER)

OFF

flash 1 s

registration ongoing

flash 0.25 s

OFF

battery LOW, link good

flash 0.5 s

OFF

battery LOW, no link

Table 7: Accessory I/O function table (PA mode)

ACC_IN (PP1)

ACC_IN (PP2)

ACC_OUT (FP)

LHL

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