參數(shù)資料
型號： ST75C540FP-A
廠商： 意法半導體
英文描述： SUPER INTEGRATED DEVICESWITH DSP, AFE & MEMORIES FORTELEPHONY,MODEM, FAXOVERINTERNET& POTSLINES
中文描述： 超級綜合DEVICESWITH數(shù)字信號處理器，模擬前端
文件頁數(shù)： 44/84頁
文件大?。?/td> 599K
代理商： ST75C540FP-A
VIII.1.3- CRCommand
Issuinga CRcommandcauses the ST75C530/540to dumpa specificmemory locationin complexmode.
This instruction is particularly useful for equalizer state analysis or for softwareeye-pattern display. The
report area has this meaning:
RP7
RP6
RP5
RP4
RP3
RP2
RP1
RP0
COMREP[0]
IP7
IP6
IP5
IP4
IP3
IP2
IP1
IP0
COMREP[1]
RP0..RP7is the MSB part of the 16-bit value of the real part and IP0..IP7is the MSBpart of theimaginary
part. TheCR commandinsures thatthe realand imaginarypart of thedesiredcomplexvalueare sampled
internallyat the same time.The addressgiven in theparameter field of CR is theaddress of the real part.
VIII.1.4- MR/TDRC/TDRW/IDT/MRI/MRLO Commands
The report issued by the MR/TDRC/TDRW/IDT/MRI/MRLO commands follow the same rules as for CR.
The report meaningis :
D7
D6
D5
D4
D3
D2
D1
D0
COMREP[0]
D15
D14
D13
D12
D11
D10
D9
D8
COMREP[1]
D0..D15is the 16-bit value requested by the command.
InthecaseofIDT,D15..D12containstheproductidentification(3forST75C530,7forST75C5540),D11..D8
containsthe hardware revision identificationand D7..D0 contains the software revisionidentification.
VIII.2 - ModemStatus
VIII.2.1- ModemStatus Description
The Status of ST75C530/540is divided into 4 fields:
- The error status byte SYSERR that provides information about error. This status can trigger an IT0
interrupt,
- The general status byte STATUS[0] and STATUS[1] that contains all the modem signals. These status
bytes can triggeran IT4 interrupt,
- The quality status STAQUA,that containsthe quality of the received transmission,
- The optional status bytes STAOP[0], STAOP[1], STAOP[2] and STAOP[3], that contains additional
information regarding the ST75C530/540operating mode. This default information can be changed to
monitor any internal variables using the DOSR command.
All these informationsare updated on a Baudbasis :
Mode
Baud Rate
(2)
(Hz)
2400
2400
2400
2400
2400
2400
1200
1600
(1)
2400
2400
2400
1200
V.32bis/V.32 (ST75C540 only)
V.22bis/V.22/Bell 212A (ST75C540 only)
Tone
Bell 103 (full duplex)
V.21 (full duplex)
V.23 (full duplex)
V.27ter 2400bps
V.27ter 4800bps
V.29
V.17/V.33
V.21 channel 2
HANDSET, CODER or DECODER Modes
Notes : 1. In thismode the tone detectors outputs are update 800 times by second.
2. This baud rate defines also, the maximum command rate. Each baud time the ST75C530/540 looks at the COMSYS location
(Address $00) to see if a command have been sent by the host processor. If the contentof this location is different from zero the
ST75C530/540 execute the command.
VIII - STATUSDESCRIPTION
(continued)
ST75C530 - ST75C540
44/84
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