NSAM266SAASLASHV datasheet(32/52 Pages) NSC

32 / 52 page

20 Software (Continued)

TLEE12584 – 30

FIGURE 2-6 Master MICROWIRE Data Transfer

214 COMMAND DESCRIPTION

The commands are listed in alphabetical order

The execution time for all commands when specified in-

cludes the time required for the microcontroller to retrieve

the return value where appropriate

The execution time does not include the protocol timing

overhead ie the execution times are measured from the

moment that the command is detected as valid until the

command is fully executed

Note

Each command description includes an example application of the

command The examples show the opcode issued by the microcon-

troller and the response returned by the CompactSPEECH For com-

mands which require a return value from the CompactSPEECH the

start of the return value is indicated by a thick vertical line

CCIO

Configure Codec IO

config-value

Configures the voice samples paths in various states It

should be used to change the default CompactSPEECH

configuration The

config-value

parameter is encoded as

follows

Bit 0

Loopback control

0 Loopback disable (default)

1 Loopback enabled During RECORD state

the input samples are echoed back un-

changed (ie

no volume control) to the co-

dec

Bits 1 – 7

Reserved

Example

CCIO 3401

Byte sequence

Microcontroller

34 01

CompactSPEECH 34 01

Description

Enable Loopback

CFG

Configure CompactSPEECH

config

value

Configures the CompactSPEECH in various hardware envi-

ronments It should be used to change the default Compact-

SPEECH configuration

The

config

value parameter is encoded as follows

Bit 0

Codec configuration

0 short-frame format (default)

1 long-frame format (Guaranteed by design

but not tested)

Bit 1

Reserved

Bit 2

Echo cancellation control

0 Echo cancellation off (default)

1 Echo cancellation is on during playback

Echo cancellation improves the performance of

DTMF detection during playback Echo cancel-

lation can be turned on only with a system that

can disable AGC during playback A system

with AGC that cannot be controlled (ie

en-

ableddisabled) by the microcontroller must not

turn on this bit

Bit 3

Reservedmust be cleared to 0

Bits 4 – 5

Reservedmust be set to 10

Bits 6 – 7

Reservedmust be cleared to 00

Bits 8 – 10

Number of installed flash devices

Valid range 1

4 flash devices

Default is 1

Bits 11 – 15

ReservedMust be cleared to 0

Note

The CompactSPEECH automatically detects the type of flash device

in use ie NM29A040 or NM29A080

Example

CFG 0324

Byte sequence

Microcontroller

01 03 24

CompactSPEECH 01 03 24

Description

Configure the CompactSPEECH to work

with

Codec that supports short-frame format

Three NM29A040 flash devices

Echo cancellation on

CMT

Cut Message Tail

time

length

Cut

time

length units each of 10 ms duration off the end

of the current message The maximum value of

time

length is 6550 Cut-time accuracy is g014 sec

Note

time

length is longer than the total duration of the message the

NORMAL

END event is set in the status word and the mes-

sage becomes empty (ie message length is 0) but is not deleted

Use the DM (Delete Message) or DMS (Delete Messages) command

to delete the message

Example

CMT 02BC

Byte sequence

Microcontroller

26 02 BC

CompactSPEECH 26 02 BC

Description

Cut the last seven seconds of the current

message

http

www nationalcom

NSAM266SAA/V 数据表(PDF) 32 Page - National Semiconductor (TI)

NSAM266SAA/V 数据表(HTML) 32 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

数据表下载

链接网址

NSAM266SAA/V 数据表(PDF) 32 Page - National Semiconductor (TI)

NSAM266SAA/V 数据表(HTML) 32 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

数据表 下载

链接网址

数据表下载