Table 531: Autodetect Medium Register (Address 1Ch, Shadow Value 11110) - Broadcom BCM5722 Programmer's Manual

BCM5722
A M
UTODETECT EDIUM

Table 531: Autodetect Medium Register (Address 1Ch, Shadow Value 11110)

Bit Field
15 Write Enable
14:10 Shadow Register Selector
9:8 Reserved
7 SerDes In-Use LED Mode
6 SerDes LED mode
5 Reserved
4 SerDes Auto Power Down
Mode
3 Power Down Inactive Interface • 1 = Power down SerDes when copper is selected;
2 Autodetect Media Default
1 Autodetect Medium Priority
0 Autodetect Medium Enable
Write Enable
During a write to this register, setting the Autodetect Medium register bit 15 allows writing to bits [9:0] of this register. For
reading the values of bits [9:0], perform an MDIO write with bit 15 cleared and preferred shadow values in bits [14:10]. The
next MDIO read of register address 1Ch contains the preferred Shadow register values in bits [9:0].
Shadow Register Selector
Register bits [14:10] of this register must be set to 11110 to enable read/write to the Autodetect Medium register.
SerDes In-Use LED Mode
Bit 7 of the Autodetect Medium register drives the transmit LED active low when SerDes is selected; inactive when copper
is selected.
SerDes LED Mode
Bit 6 of the Autodetect Medium register enables the use SerDes transmit, receive, and link for LEDs whenever SerDes mode
is selected via register 1Ch, shadow 11111, bits [2:1].
Page 475 Transceiver Registers
(PHY_A = 0 1, R
DDR X
Description
• 1 = Write bits [9:0].
• 0 = Read bits [9:0].
11110 = Autodetect Medium register.
Write as 00, ignore when read.
• 1 = Drive transmit LED active low when SerDes is
selected, inactive when copper selected.
• 0 = Normal transmit LED operation.
• 1 = Use SerDes transmit, receive, and link for
LEDs whenever SerDes mode is selected via
register 1Ch, shadow 11111, bits [2:1].
• 0 = Always use copper transmit, receive, and link
for LEDs regardless of the mode selected.
Write as 1, ignore when read.
• 1 = Power down SerDes when filtered signal
detect is inactive.
• 0 = Normal operation.
power down copper when SerDes is selected.
• 0 = Normal operation.
• 1 = SerDes selected when no medium is active.
• 0 = Copper selected when no medium is active.
• 1 = SerDes selected when both media are active.
• 0 = Copper selected when both media are active.
• 1 = Enable autodetect medium.
• 0 = Disable autodetect medium.
Bro adco m C orp or atio n
_A = 1C , S
EG DDR H
Programmer's Guide
11110 )
HADOW B
Init Access
0 R/W
11110 R/W
00 R/W
NOT R/W
INTF_SEL[3]
INTF_SEL[2] R/W
AND NOT
INTF_SEL[3]
1 R/W
0 R/W
0 R/W
0 R/W
1 R/W
0 R/W
Document 5722-PG101-R
10/15/07