st802rt1a STMicroelectronics, st802rt1a Datasheet - Page 30

• Manufacturer Part Number: st802rt1a
• Description: 10/100 Real-time Ethernet 3.3 V Transceiver
• Manufacturer: STMicroelectronics

Registers and descriptors description
Table 22.
Table 23.
30/58
15:14
15:12
11:9
10:8
7:3
Bit
4:2
Bit
13
12
11
2
1
0
8
7
6
5
1
0
Auto Neg Complete
(Baseline wander)
RESERVED
RESERVED
RESERVED
RESERVED
suppression
RESERVED
Transmit Isolation
PHY ADDR
Enable NRZI to
Enable DC rest
Bit name
Preamble
Disable RX err
MLT3 Disable
Descrambler
RESERVED
RESERVED
RESERVED
Scrambler /
Bit name
RN13 [0d19, 0x13]: 100Base-TX control register
RN14 [0d20, 0x14]: Receiver mode control register
counter
Disable
CMode
NRZ
--
--
--
Physical address for MDIO management
--
1 -> Accepts management frames with preamble
suppressed
0 -> Doesn't accept management frames without
preamble
--
--
1 -> RX error counter disabled
0 -> Normal operation
1 -> Auto-negotiation complete
0 -> Auto-negotiation not completed
--
1 -> Baseline wander enabled (DC restoration enabled)
0 -> Baseline wander disabled
1 -> nrz<->nrzi conversion enabled
0 -> nrz<->nrzi conversion disabled
--
1 -> Isolates MII and TX+/-
0 -> Normal operation
000 -> Auto-negotiation running
001 -> 10Base-T half-duplex
010 -> 100Base-TX half-duplex
011 -> Not used
100 -> Not used
101 -> 10Base-T full-duplex
110 -> 100Base-TX full-duplex
111 -> Transmit isolation
1 -> MLT3 encoder and decoder disabled
0 -> MLT3 encoder and decoder enabled
1 -> scrambler and descrambler disabled
0 -> scrambler and descrambler enabled
Scrambling-descrambling are always disabled if
operating in FX mode
Description
Doc ID 17049 Rev 1
Description
ST802RT1A, ST802RT1B
Default
0000b
Strap
000b
Default
0
0
1
0
000b
000b
00b
0
0
1
1
1
0
0
0
Type
RW
RW
RW
RW
RO
RO
RO
RO
Type
RW
RW
RW
RW
RW
RW
RW
RW
RW
RO
RO
RO
Type
Type
P
P
P
P
-
-
-
P
-
-
-
-
-
-
-
-
-
-