PSB7110 Datasheet, PDF (70/164 Pages) Siemens Semiconductor Group – Enhanced ISDN Data Access Controller ISAR

_________________________________________________PSB 7110
3.5.2.3
SART Control Commands with Transmit Data - Binary (Host
→ ISAR)
7
6
DPS
HIS
CTRL MSB
15
14
0
0
CTRL LSB
7
6
1. Parameter
7
6
:
N. Parameter
7
6
DPS ... Datapath selection
01: path 1
10: path 2
5
4
3
2
MSC
1
0
0
0
13
12
11
10
0
0
0
0
5
4
3
2
NOM
5
4
3
2
1st databyte of the message
5
4
3
2
N-th databyte of the message
1
0
MDS
0
0
9
8
0
NMD
1
0
1
0
1
0
The control function is valid if the corresponding bit is set to "1":
NMD ... No More Data (only for fax modulations pump mode)
Indicates the end of the data stream and initiates the termination of the current modulation.
NMD has the similar effect as the command CMD_ESCAPE, the difference is, that NMD will
cause the fax pump to turn off the modulation right after the last valid data and so enable to
cope with timings related to certain protocols.
After the last message of a binary data stream has been sent, immediately another separate
message with NMD must be issued by the host, containing one dummy databyte (CTRL
LSB=1), that will be discarded by the ISAR.
NOM ... Number of Valid Bytes in the Mailbox
Indicates the number N of valid data bytes in the mailbox to be transmitted.
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