- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄382553 > ST75C540FP-A (意法半導(dǎo)體) SUPER INTEGRATED DEVICESWITH DSP, AFE & MEMORIES FORTELEPHONY,MODEM, FAXOVERINTERNET& POTSLINES PDF資料下載
參數(shù)資料
| 型號(hào)： | ST75C540FP-A |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | SUPER INTEGRATED DEVICESWITH DSP, AFE & MEMORIES FORTELEPHONY,MODEM, FAXOVERINTERNET& POTSLINES |
| 中文描述： | 超級(jí)綜合DEVICESWITH數(shù)字信號(hào)處理器，模擬前端 |
| 文件頁(yè)數(shù)： | 75/84頁(yè) |
| 文件大?。?/td> | 599K |
| 代理商： | ST75C540FP-A |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)當(dāng)前第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)
XIII.4 - Receive(CODER)
This function can be enteredeither by :
- TheCONFCODERCommand.Thiscorresponds
to the “NormalAnswering Machine” function.
- The MODC Command with MODC_COD = 1, in
the HANDSET Mode. This corresponds, in the
HANDSET mode to the “Conversation Record-
ing” function. This reduced sub-mode does not
allow ADPCM format and doesnot performVAD
(VoiceActivityDetector).
Once this function is selected, the ST75C530/540
startsto codethe voicesignal, writes one frameof
compressed voice into the VOCDATAbytes (if the
lowbit ratemode isselected,computesalwaysthe
Correctorbytes and writes themin the VOCCORR
bytes)thenwritestheVOCSTAbyteandgenerates
the IT1 interrupt.
The IT1 interrupt rate is as follows:
Mode
Interrupt
Time
(ms)
Number of Voice
Samples
in the Buffer
(8kHz sampling)
36
48
72
240
ADPCM 32Kpbs
ADPCM 24Kpbs
ADPCM 16Kpbs
Low Bit Rate (with and
without error correction)
4.5
6
9
30
Note that the VOCCORR are always computed,
whateverthe value of CONF_ERCOR.
The format of the VOCSTAbyte is as follows:
VOCSTAT
Pos. Value
7
Format
Low Bit
Rate
Field
VOC
_VAD
VOC
_NUM
VOC
_VAD
VOC
_NUM
Definition
0
1
VADUnvoiced Signal.
VAD VoiceSignal.
10100 (20 decimal) Number
of VOCDATA Bytes
0
1
VAD VoiceSignal.
10010 (18 decimal) Number
of VOCDATA Bytes
4..0
ADPCM
7
VAD UnvoicedSignal.
4..0
Note thatin“Conversationrecording”the VOCSTA
byte is always $14.
The user must read the VOCDATA(and optionally
the VOCCORR) bytesand clear theVOCSTAbyte
(writing $00).
If the userdoes not clear the VOCSTAbyte within
the interrupt time, the ST75C530/540 will signal
thiserrorbyrisingtheERR_VOCOin theSYSERR
byte and rising the IT0 Interrupt. In this case the
current frame is lost.
If the CONF_SUPSILbit is 1 in the CONFCODER
command, the interrupts IT1 appears only when
the VADhas detecteda voiced signal.
XIII - VOCODERDATA EXCHANGE
(continued)
ST75C530- ST75C540
75/84
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST763 | 3.3V STEP DOWN CURRENT MODE PWM DC-DC CONVERTERS |
| ST763ACD | MOSFET; Transistor Polarity:N Channel |
| ST763ACDTR | 3.3V STEP DOWN CURRENT MODE PWM DC-DC CONVERTERS |
| ST763A | 3.3V STEP DOWN CURRENT MODE PWM DC-DC CONVERTERS |
| ST763AB | 3.3V STEP DOWN CURRENT MODE PWM DC-DC CONVERTERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST75C540PQFP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| ST-75V | 制造商:Taiyo Electric Ind. 功能描述: |
| ST7-6 | 制造商:SUPERWORLD 制造商全稱:Superworld Electronics 功能描述:POWER TRANSFORMER |
| ST7624 | 制造商:SITRONIX 制造商全稱:SITRONIX 功能描述:65K Color Dot Matrix LCD Controller/Driver |
| ST7625 | 制造商:SITRONIX 制造商全稱:SITRONIX 功能描述:65K Color Dot Matrix LCD Controller/Driver |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。