
Page 195
Cortina Systems LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
LXT9785/LXT9785E
Datasheet
249241, Revision 11.0
16 April 2007
7.0 Register Definitions
Figure 63
PHY Identifier Bit Mapping
Table 88
Auto-Negotiation Advertisement Register (Address 4)
Bit
Name
Description
Type1
Default
15
Next Page
0 = Port has no ability to send manual next pages
1 = Port has ability to send manual next pages
Note:
This bit should only be set to manually control the auto-
negotiation process. It is not needed and should be cleared
for DTE Discovery.
R/W
0
14
Reserved
Write as 0, ignore on Read
R
0
136
Remote Fault
0 = No remote fault
1 = Remote fault
R/W
0
12
Reserved
Write as 0, ignore on Read
R/W
0
11
Asymmetric
Pause
Pause operation defined in Clause 40 and 27
0 = Port is not Pause capable
1 = Port can only send Pause
R/W
0
10
Pause5
0 = Pause operation disabled
1 = Port can send and receive Pause
Note:
Default for the BGA15 package is 0.
R/W
LSHR2,3
1. R/W = Read/Write, R = Read Only
2. LSHR = Default value is derived from a single device input pin state or a group of device input pin states as
the pin(s) are latched at startup or hardware reset.
3. The default setting of Register bit 4.10 is determined by the PAUSE pin. The BGA15 package does not
have a Pause hardware configuration pin and has a default of 0.
4. Default settings for bits 4.5:8 are determined by CFG pins as described in
Table 42,5. Pause operation is only valid for full-duplex modes.
6. If Register bit 4.13 is set to advertise a fault, Register bit 1.4 will be set. Register bit 4.13 is set or cleared
only through the MDC/MDIO interface and is not cleared upon completion of auto-negotiation.
Note:
Restart the auto-negotiation process whenever Register 4 is written/modified.
f
a
bc
1
23
Organizationally Unique Identifier
rs
18 19
0
00
0
00
0
00
0
01
0
01
0
5
1
PHY ID Register #1 (Address 2)
x
24
0
11
1
10
9
4
3
0
5
1
X
PHY ID Register #2 (Address 3)
10
0
I/G
5
0
Manufacturer's
Model Number
30
0
001
3
0
002
B
7
XX
X
XXXXXX
7B
20
00
The Cortina OUI is 00207B hex.
Model
Variant
1
Revision
Number