SC14CVMDECT datasheet(9/57 Pages) DIALOG

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Datasheet

Revision 3.0

28-Jul-2015

CFR0011-120-00-FM Rev 5

9 of 57

SC14CVMDECT SF

Cordless Voice Module

FINAL

3.0 Cordless Voice Module functions

This section describes the key functions and features

supported by the SC14CVMDECT SF as shown in Fig-

ure 2.

3.1 MODULE HARDWARE

The SC14CVMDECT SF internal hardware consists of:

• An internal microprocessor is running from FLASH

and handles the API call coming from UART or

embedded user software.

• A 4 kB VES (Virtual EEPROM Storage) used by the

protocol stack and for user variables.

• A DSP for the audio signal processing like ADPCM

voice compression towards the CODEC.

• A CODEC converts the analog signals to digital sig-

nals and vise versa.

• Input/Output ports which can be toggled high/low as

an output or a high/low digital level can be read as

an input.

• A 20.736 MHz XTAL. This crystal is automatically

tuned by the PP module software for optimal radio

performance.

• Voltage regulators convert the external supply volt-

age (VBAT) to stable supply voltages for the core

and the I/Os.

• A DECT radio transceiver with a built-in antenna cir-

cuit. The antenna itself is integrated into the module,

relieving the product designer from RF expertise.

• A full duplex UART for communication with an

optional host processor.

3.2 SOFTWARE CONTROL

The application software is written by the customer and

has to manage the call control and also the MMI func-

tions. The supported API software includes the Net-

work layer that is defined in figure 1 of the EN300 175-

3 document, which describes the DECT protocol stack.

Detailed functions and data flows, including some

example sequences, can be found in document refer-

ence [1] for FP and [2] for PP.

The default configuration of the SC14CVMDECT SF

module software is: US DECT, FP and CoLA enabled.

3.3 DECT PROTOCOL STACK

The SC14CVMDECT SF internal protocol stack is

based on the ETSI DECT specifications and is compli-

ant with ETSI 300 444 (GAP).

The product supports up to 6 DECT GAP compliant PP

units to one FP station.

Figure 2: SC14CVMDECT SF functional overview

FLASH

User SW

UART

XTAL

Phoenix Host API

CODEC / PCM

API commands

UART interface to host

SPI

Ports

Port Pins

PCM Port

Head Set

DECT RF

DSP

Protocol

Stack

Radio

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