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參數(shù)資料
| 型號： | ST75C530FP-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)： | 64/84頁 |
| 文件大?。?/td> | 599K |
| 代理商： | ST75C530FP-A |
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FORM3
XMIT 1
XMIT 0
XMIT1
FORM 2
XMIT0
STA_106
DATA
TRANSMITTED
COMMANDS :
1
0
$7E
1
0
1
7
Figure 26
XI- TRANSMITTING DATA IN PARALLEL MODE
XI.1 - Description
XI.1.1- XMIT Command
The
XMIT
Command works like a CTS signal for
the Parallel Data process.
When
XMIT
is off, the ST75C530/540 transmits
continuous“1”.WhenontheST75C530/540trans-
mitsData inaccordancewith the
FORM
command
and startsto manage the Data Buffer.
This command can be sent at any time, while in
Data Mode (seeTable below).
XI.1.2- FORM Command
The
FORM
Command can be sent at any time to
redefine the current format. The effect will take
place only when
XMIT
is on.
Here is a formal exampleshowing the relationship
between
XMIT
, and
FORM
Commands (see Fig-
ure 26).
XI.1.3- STOPCommand
The
STOP
command is used, at the end of the
transmission, to stop sending the carrier on the
telephoneline.
Prior to the
STOP
command the user must have
stop the parallel transmition with a
XMIT off
com-
mand.
Whenthecurrentdatabufferwillbe totalytransmit-
ted,and that no morebufferswillbe available,that
is to said both
DTTBF0
and
DTTBF1
will be $00
(equivalentto an Underruncondition).
XI.1.4- Timing
Here are regular sequences to stop properly the
transmition (see Figure 27).
Field
Byte Pos.
1
Value
0 *
1
Definition
(Off) Send
continuous “1”
(**)
.
(On) Send
according with the
Formatdefinedinthe
FORM
command.
TX_START
0
Data
**
The
XMITOff
commandtakeseffectonly whenthetwo Transmit
buffers are empty :
DTTBF0
and
DTTBF1
equal to$00.
FeedLast Buffer
XMIT0
STOP
FeedLast Buffer
XMIT0
STOP
DATA
TRANSMITTED
STA_106
DATA
TRANSMITTED
STA_106
(ignored until here)
(ignored until here)
$7E
CRC16
LastBuffer
LastBuffer
Case # 1 Synchronous Format
Case # 2 HDLC Format
Case # 3 UART Format
STA_106
1
XMIT0
STOP
DATA
TRANSMITTED
(ignored until here)
LastBuffer
1
1
7
Figure 27
ST75C530 - ST75C540
64/84
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|---|---|
| ST75C530PQFP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
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| 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: |
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