ADM7001XACT1XP Lantiq, ADM7001XACT1XP Datasheet - Page 28

• Manufacturer Part Number: ADM7001XACT1XP
• Manufacturer: Lantiq

Specifications of ADM7001XACT1XP

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Table 12
PCS Code-Group[4:0]
11010
11011
11100
11101
11111
11000
10001
01101
0111
00100
00000
00001
00010
00011
00101
00110
01000
01100
10000
11001
Valid Data Signal
The valid data signal (RXDV) indicates that recovered and decoded nibbles are presented on the internal RXD[3:0]
synchronous to receive clock, RXCLK. RXDV is asserted when the first nibble of translated /J/K is ready for
transfer over the internal MII. It remains active until either the /T/R delimiter is recognized, link test indicates failure,
or no signal is detected. On any of these conditions, RXDV is deasserted.
Receive Errors
The RXER signal is used to communicate with receiver error conditions. While the receiver is in a state of holding
RXDV asserted, the RXER will be asserted for each code word which does not map to a valid code-group.
100Base-X Link Monitor
The 100Base-X link monitor function allows the receiver to ensure that reliable data is received. Without reliable
data reception, the link monitor will halt both transmit and receive operations until a valid link is detected.
The ADM7001 performs the link integrity test as outlined in IEEE 100Base-X (Clause 24) link monitor state
diagram. The link status is multiplexed with 10 Mbits/s link status to form the reportable link status bit in serial
management register 1h, and driven to the LNKACT pin.
When persistent signal energy is detected on the network, the logic moves into a Link-Ready state after
approximately 500 µs, and waits for an enable from the auto negotiation module. When receiving, the link-up state
Data Sheet
Look-up Table for Translating 5B Symbols into 4B Nibbles (cont’d)
Name
C
D
E
F
I
J
K
T
R
H
V
V
V
V
V
V
V
V
V
V
MII (TXD/RXD)<3:0>
1100
1101
1110
1111
Undefined
0101
0101
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
28
Interpretation
Data C
Data D
Data E
Data F
IDLEused as inter-stream fill code
Start-of-Stream Delimiter, Part 1 of 2; always
used in pairs with K
Start-of-Stream Delimiter, Part 2 of 2; always
used in pairs with J
Start-of-Stream Delimiter, Part 1 of 2; always
used in pairs with R
Start-of-Stream Delimiter, Part 2 of 2; always
used in pairs with T
Transmit Error; used to force signaling errors
Invalid code
Invalid code
Invalid code
Invalid code
Invalid code
Invalid code
Invalid code
Invalid code
Invalid code
Invalid code
Function Description
Rev. 1.07, 2005-09-12
Data sheet
ADM7001