VSC8221 datasheet(98/138 Pages) MICROSEMI

98 / 138 page

VSC8221

Data Sheet

VMDS-10106 Revision 4.1

December 2006

98 of 106

106

23.2.32 Register 31 (1Fh) – Extended Page Access

31.15:1 – Reserved

31.0 - Extended Page Access

in order to provide additional functionality beyond the iEEE802.3 specified 32 Mii registers, the VSC8221 contains an extended

register set which supports an additional 15 registers. When bit 31.0 is set to a “1”, Mii registers 16:30 will access the extended

set of registers. The state of bit 31.0 has no effect on Mii registers 0:15.

23.3 Extended Mii Registers

23.3.1 Register 16E (10h) - Reserved

16E.15:0 – Reserved

23.3.2 Register 17E (11h) - Serdes Control Register

1 This register will always read zero.

Bit

Name

Access

States

Reset Value

Sticky

15:1

Reserved

00000000 0000000

Extended Page Access R/W

1 = Mii registers 16:30 will access extended

0 = Mii registers 16:30 will access standard

Bit

Name

Access

States

Reset Value

Sticky

15:0

Reserved

00000000 00000000

Bit

Name

Access

States

Reset Value

Sticky

15:5

Reserved

00000000 000

4:2

RDP/RDN SCLKP/SCLKN

Output Swing Control

R/W

000=0.4mv(p-p)

001=0.6mv(p-p)

010=0.8mv(p-p)

011=1.0mv(p-p)

100=1.2mv(p-p)

101=1.4mv(p-p)

110/111=1.6mv(p-p)

100

25mv Hysteresis Disable

R/W

1=Disable

0=Enable

CLKOUTMiCRO Enable

R/W

1=Enable

0=Disable

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