PSB7110 Datasheet, PDF (56/164 Pages) Siemens Semiconductor Group – Enhanced ISDN Data Access Controller ISAR

_________________________________________________PSB 7110
3.4
SART Configuration
Depending on the SART mode (HDLC, ASYNC or binary) the message requires a specific coding, which is
described in the following three chapters.
For SART configuration all parameters have to be set for the corresponding SART mode even though
a single parameter may not be different from the previous setting.
Important note:
After configuration of the pump, the configuration information of the SART gets lost, therefore the
SART unit must be configured after the pump configuration.
3.4.1
SART Configuration Setup - HDLC (Host
→ ISAR)
7
6
5
4
3
2
1
0
DPS
MSC
MDS
HIS
1
0
0
1
0
1
CTRL MSB
15
14
13
12
11
10
9
8
HDMC
0
0
SMODE
CTRL LSB
7
6
5
4
3
2
1
0
1
1. Parameter
7
6
5
4
3
2
1
0
0
0
0
HIO
IFF FLEN EDF DUO
DPS ... Datapath selection
01: path 1
10: path 2
HDMC ... Halfduplex Mode Configuration
00: Receive and transmit channel are enabled (default)
01: Receive channel is disabled
10: Transmit channel is disabled
11: not used
In halfduplex mode the pump would transfer idle bits in the direction that is currently not in
use, so the corresponding receive or transmit channel can be selectively disabled to reduce
the interrupt load for not valid data.
For all other pump modes except halfduplex mode, HDMC must be set to its default value 00.
SMODE ... SART Mode
0000: Disable SART
0010: V.14 mode
0011: HDLC mode
0100: Binary mode
0101: FSK V.14 mode
all other codes reserved
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