SC14CVMDECT datasheet(14/57 Pages) DIALOG

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Datasheet

Revision 3.0

28-Jul-2015

CFR0011-120-00-FM Rev 5

14 of 57

SC14CVMDECT SF

Cordless Voice Module

FINAL

4.0 Functional description

4.1 UART INTERFACE

The UART is normally used for API commands, but

can also be used for software upgrades and debug-

ging.

The UART is a full duplex UART with frame type:

1 start bit,

8 data bits (LSB first),

1 stop bit,

no parity,

up to 115.2 kBd.

The UART hardware interface uses only TX/RX

(see Figure 7).

Caution: All UART signals are 1.8 V, input max. 3.45 V

(see Table 18, Table 21 and Table 22). An external V.24

line driver must be provided if the UART port of the

module is connected to a standard V.24 device (±12 V).

Connecting the module without a driver may damage

the module.

4.2 VES (VIRTUAL EEPROM STORAGE)

4.2.1 VES layout

The SC14CVMDECT SF PP and FP include a 4 kB

VES which is divided into two areas (see Table 6).

VES is supported as virtual EEPROM with the internal

FLASH.

A detailed overview of the VES parameters can be

found in document reference [4].

Some parts of the VES parameters are read into the

SC14CVMDECT SF during the start up and other parts

are used by the SC14CVMDECT SF software during

execution.

The VES parameters are divided into two types:

• Factory type

• Normal type

The “factory” type is specific for the SC14CVMDECT

SF and should only be set by production. The “factory”

type parameters are either adjustments used by the

baseband or the radio interface, or are used to set up

the SC14CVMDECT SF into special modes. The “fac-

tory” type parameters will only be modified by changing

the factory programmed default value. See document

reference [4].

The “normal” VES parameters can be reset to their

default values via software.

4.2.2 VES access by MCU

The host is able to read or modify the VES parameters

or limited free VES areas via API command.

Figure 7: UART hardware configuration

SC14CVMDECT

MCU

TX (serial out), module pin 48

RX (serial in), module pin 47

GND

Table 6: VES map

VES space

Size

Usage

SC14CVMDECT

3.6 kB

Used for RF, audio,

battery, tone setup,

data base, etc.

User

0.4 kB

Can be used for

MMI applications

such as User infor-

mation.

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