Technical data

Bit position Bit name R/W Function
15:13 - R/W Reserved
Write 000
b
; ignore on read access
12 Autodone R
A
utodone
Indicates, if auto-negotiation is done
Autodone Auto-negotiation done indication
0
b
A
uto-negotiation is not done or is disabled (initial
value)
1
b
A
uto-negotiation is done
11:7 - R/W Reserved
Write 00H; ignore on read access
6 Enable 4B5B R/W Enable 4B5B
A
llows to bypass the 4B/5B encoder/decoder.
Enable 4B/5B 4B/5B encoder/decoder bypass selection
0
b
4B/5B encoder/decoder is bypassed
1
b
4B/5B encoder/decoder is enabled (initial value)
5 - R/W Reserved
Write 000
b
; ignore on read access
4:2 Speed
Indication
R Speed Indication
Indicates Speed and HD/FD mode of the currently established link
Speed Indication Current link speed indication
000
b
No link (initial value)
001
b
10BASE-T half duplex
010
b
100BASE-TX half duplex
101
b
10BASE-T full duplex
110b 100BASE-TX full duplex
others Reserved
1 - R/W Reserved
Write 0
b
; ignore on read access
0 Scramble
Disable
R/W Scramble Disable
A
llows to bypass the data scrambler/descrambler blocks.
Scramble Disable Data scrambler/descrambler bypass selection
0
b
Data scrambler/descrambler enabled (initial value)
1
b
Data scrambler/descrambler disabled
Table 44: PHY Special Control/Status Register Description
Copyright © Siemens AG 2008. All rights reserved. Page 51 ERTEC 200 PHY
Technical data subject to change Version 1.0.0