psb21391 Infineon Technologies Corporation, psb21391 Datasheet - Page 62
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psb21391
Manufacturer Part Number
psb21391
Description
Siemens Codec With Upn Transceiver
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PSB21391.pdf
(253 pages)
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Data Sheet
channel address code which is ’1010’ for the SCOUT. The lower nibble distinguishes
between a programming command or an identification command.
Identification Command
In order to be able to identify unambiguously different hardware designs of the SCOUT
by software, the following identification command is used:
DD 1st byte value
DD 2nd byte value
The SCOUT responds to this DD identification sequence by sending a DU identification
sequence:
DU 1st byte value
DU 2nd byte value
DESIGN: six bit code, specific for each device in order to identify differences in operation
(see chapter 7.1.12).
This identification sequence is usually done once, when the terminal is connected for the
first time. This function is used by the software to distinguish between different possible
hardware configurations. However this sequence is not compulsory.
Programming Sequence
The programming sequence is characterized by a ’1’ being sent in the lower nibble of the
received address code. The data structure after this first byte is equivalent to the
structure of the serial control interface described in chapter 2.1.1.
DD 1st byte value
DD 2nd byte value
DD 3rd byte value
DD 4th byte value
DD (nth + 3) byte value
All registers can be read back when setting the R/W bit to ’1’ in the byte for the command/
register address. The SCOUT responds by sending his IOM specific address byte (A1
followed by the requested data.
R/W
1
0
1
1
1
0
0
0
0
0
1
0
1
0
0
0
1
52
DESIGN
Header Byte
0
0
0
Register Address
0
Data 1
Data n
Command/
0
0
0
0
0
0
0
0
0
0
0
<IDENT>
0
PSB 21391
PSB 21393
1
Interfaces
2001-03-07
h
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