參數(shù)資料
型號: PSB7110
廠商: SIEMENS AG
英文描述: Enhanced ISDN Data Access Controller ISAR
中文描述: 增強綜合業(yè)務(wù)數(shù)字網(wǎng)的數(shù)據(jù)接入控制器專家組
文件頁數(shù): 42/164頁
文件大?。?/td> 1173K
代理商: PSB7110
_________________________________________________PSB 7110
Siemens Aktiengesellschaft
Page 42
3.1.5.1
Interrupt Status Byte
The interrupt status byte has a structure that defines the type of message, i.e. it contains information
to which buffer the message is related to, the kind of message and to which functional block of the ISAR the
message is related to:
7
6
5
4
3
2
1
0
HIS / IIS
DPS
MSC
MDS
DPS ... Datapath selection
One of the three data paths (0, 1 or 2) of the ISAR is selected.
MSC ... Message coding
MSC defines the type of command (e.g. configuration request, configuration response, status event, control
command, ...) to perform a certain function.
MDS ... Message destination/source
Selects one of the four functional blocks on the ISAR (buffer, SART, data pump and IOM-2) to which the
message is sent (host
ISAR) or from which a message is originated
(ISAR
host).
The coding for the HIS and IIS registers are listed below. It should be noted, that not all combinations of buffer
selection (DPS), message coding (MSC) and message destination/source (MDS) are available at the programming
interface.
It is important to note that the coding for test/diagnostics messages (DPS=00) does not conform to the above shown
structure of MSC and MDS. Instead these bits fully specify an individual message function.
Some of the test/diagnostics messages are only used for DSP download and are not valid after regular operation has
started (see 3.10 DSP Program Download)
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