- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄378071 > PSB7110 (SIEMENS AG) Enhanced ISDN Data Access Controller ISAR PDF資料下載
參數(shù)資料
| 型號(hào)： | PSB7110 |
| 廠商： | SIEMENS AG |
| 英文描述： | Enhanced ISDN Data Access Controller ISAR |
| 中文描述： | 增強(qiáng)綜合業(yè)務(wù)數(shù)字網(wǎng)的數(shù)據(jù)接入控制器專家組 |
| 文件頁(yè)數(shù)： | 55/164頁(yè) |
| 文件大?。?/td> | 1173K |
| 代理商： | PSB7110 |
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)當(dāng)前第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)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)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)第138頁(yè)第139頁(yè)第140頁(yè)第141頁(yè)第142頁(yè)第143頁(yè)第144頁(yè)第145頁(yè)第146頁(yè)第147頁(yè)第148頁(yè)第149頁(yè)第150頁(yè)第151頁(yè)第152頁(yè)第153頁(yè)第154頁(yè)第155頁(yè)第156頁(yè)第157頁(yè)第158頁(yè)第159頁(yè)第160頁(yè)第161頁(yè)第162頁(yè)第163頁(yè)第164頁(yè)
_________________________________________________PSB 7110
Siemens Aktiengesellschaft
Page 55
3.3.3.2
Buffer General Status Event (ISAR
→
Host)
If a data path is online and the associated write buffer has space available for a new message, the
status event message “buffer available” is generated to request new data from the host.
The IO-buffer control unit generates write buffer status event messages that cover information about
all buffers, thus the IIS register contains a general code (IIS = 0). In this way the load for transfering
messages is decreased significantly, as a single message may request data for more than one
datapath. It is the responsibility of the host to dispatch RDMx to the controller routines of the relevant
datapath.
7
6
5
4
3
2
1
0
DPS
MSC
MDS
IIS
0
0
0
0
0
0
0
0
15
0
14
0
13
0
12
0
11
10
9
8
CTRL MSB
RDM3
RDM2
RDM1
RDM0
7
6
5
4
3
2
1
0
CTRL LSB
0
RDM3, RDM2, RDM1, RDM0 ... Request for next Data Message from Channel 2, 1 or 0
If bit RDM2, RDM1 or RDM0 is set, the corresponding channel 0, 1 or 2 requests for a new
data message from the host.
RDM3 is currently not supported but reserved for further use.
A status event is generated by the control unit and indicated to the host when
at least one of the write buffers changes its state from "not enough free space" to "enough free
space for another data message", or when
at least one of the write buffers has still enough free space for another message immediately after
a new message was written into this buffer.
Only when either of these two states is met, the status event message is generated. If the request is
not serviced by the host, the ISAR will not generate a new status event message to request data for
that path.
It should be noticed that the corresponding bit for that buffer remains not set in the control register
each time another buffer generates an interrupt to request new data.
However a status request message (see 3.3.1) can force the generation of an indication for buffer
available for a certain buffer.
The general proceeding for data transfer from the host to the transmit buffer would be:
after Reset the ISAR will release an initial status event message with
RDM0=RDM1=RDM2=RDM3=1
the host configures buffer, data pump, IOM-2 interface and SART
the host writes the first message to the buffer (buffer is empty after reset)
if the remaining buffer space is greater than the programmed message length, there will be an
immediate interrupt to the host, who in turn can transfer the next message.
if the remaining buffer space is smaller than the programmed message length, there will be no
interrupt to the host until data is transmitted from the buffer and enough space is available to
accept one complete message.
if there is a request for message to the host and the host has no new message to send, the host
should store the request information, so for new data it can immediately continue with transfering
it to the buffer.
the host can force the generation of an indication for buffer available for a certain buffer (see
3.3.1).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PSB7115 | Enhanced ISDN Data Access Controller ISAR 34 |
| PSB7115FV2.1 | Enhanced ISDN Data Access Controller ISAR 34 |
| PSB7230 | Joint Audio Decoder-Encoder for Analog Videophone JADE AN |
| PSB7238 | Joint Audio Decoder-Encoder - Multimode |
| PSB7280 | Joint Audio Decoder-Encoder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PSB7115 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Enhanced ISDN Data Access Controller ISAR 34 |
| PSB7115FV2.1 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Enhanced ISDN Data Access Controller ISAR 34 |
| PSB71F | 制造商:POWERSEM 制造商全稱:POWERSEM 功能描述:Single Phase Rectifier Bridge |
| PSB71F04 | 制造商:POWERSEM 制造商全稱:POWERSEM 功能描述:Single Phase Rectifier Bridge with fast Recovery Epitaxial Diode (FRED) |
| PSB71F06 | 制造商:POWERSEM 制造商全稱:POWERSEM 功能描述:Single Phase Rectifier Bridge with fast Recovery Epitaxial Diode (FRED) |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。