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): 67/164頁
文件大?。?/td> 1173K
代理商: PSB7110
_________________________________________________PSB 7110
Siemens Aktiengesellschaft
Page 67
3.5.2
SART Control Commands with Transmit Data (Host
ISAR)
The SART transmitters control commands, which are data related, are passed to the ISAR along with
any data transfer via the mailbox.
The SART control command is coded in the CTRL MSB, while the CTRL LSB indicates the number of
data available in the mailbox for transmission.
Messages without data bytes, i.e. messages with CTRL LSB = 0, will be discarded by the ISAR.
3.5.2.1
SART Control Commands with Transmit Data - HDLC (Host
ISAR)
7
6
5
4
3
2
1
0
DPS
MSC
MDS
HIS
1
0
0
0
0
0
15
0
14
FED
13
FST
12
11
0
10
0
9
0
8
CTRL MSB
GFA
NMD
7
6
5
4
3
2
1
0
CTRL LSB
NOM
7
6
5
4
3
2
1
0
1. Parameter
1st databyte of the message
:
7
6
5
N-th databyte of the message
4
3
2
1
0
N. Parameter
DPS ... Datapath selection
01:
10:
path 1
path 2
The control command is valid if the corresponding bit is set to "1":.
FED ... Frame End
The last databyte in the mailbox is indicated as the last of the HDLC frame.
FST ... Frame Start
The first databyte in the mailbox is indicated as the first of the HDLC frame.
GFA ... Generate Frame Abort
Initiates the generation of an abort sequence.
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