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VSC8221 Datasheet(PDF) 36 Page - Microsemi Corporation

Part # VSC8221
Description  Single Port 10/100/1000BASE-T PHY with1.25 Gbps SerDes for SFPs/GBICs
PDF  138 Pages
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Manufacturer  MICROSEMI [Microsemi Corporation]
Direct Link  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

VSC8221 Datasheet(HTML) 36 Page - Microsemi Corporation

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VSC8221
Data Sheet
VMDS-10106 Revision 4.1
December 2006
36 of 40
40
12.1.2 Write Operation - Sequential Write
• R4..R0 are the 5 bits of the Register address R.
• M7..M0 are bits of the Upper byte of the 16 bit Register data
• L7..L0 are bits of the Upper byte of the 16 bit Register data
The PHY register is written only after the host performs the lower data byte write operation.
S
0
0
0
A
0
0
1
1
0
1
0
1
A
A
R0
R1
R2
R3
R4
M0
M1
M2
M3
M4
M5
M6
M7
A
L0
L1
L2
L3
L4
L5
L6
L7
From Host to PHY/Receiver
From PHY/Receiver to Host
A
M0
M1
M2
M3
M4
M5
M6
M7
A
L0
L1
L2
L3
L4
L5
L6
L7
A
M0
M1
M2
M3
M4
M5
M6
M7
A
L0
L1
L2
L3
L4
L5
L6
L7
T
LSB for Register R
LSB for Register R+n
MSB for Register R+n
LSB for Register R+1
MSB for Register R+1
MSB for Register R



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