MAX5980 MAXIM [Maxim Integrated Products], MAX5980 Datasheet - Page 40

• Manufacturer Part Number: MAX5980
• Description: Quad, IEEE 802.3at/af PSE Controller
• Manufacturer: MAXIM [Maxim Integrated Products]

Quad, IEEE 802.3at/af PSE Controller
for Power-over-Ethernet
The ID register (R1Bh, Table 28) keeps track of the
device ID number and revision. The device’s ID code
is stored in ID_CODE[4:0] (R1Bh[7:3]) and is 11010.
Contact the factory for the value of the revision code
stored in REV[2:0] (R1Bh[2:0]) that corresponds to the
device lot number.
The Class 5 Enable register (R1Ch, Table 29) is used
to enable the classification of Class 5 devices. On a
power-up or after a reset condition, if EN_CL5 = 0. this
Table 29. Class 5 Enable Register
Table 28. ID Register
40
SYMBOL
ID_CODE
SYMBOL
Reserved
Reserved
Reserved
Reserved
CL5_EN4
CL5_EN3
CL5_EN2
CL5_EN1
REV
ADDRESS = 1Bh
ADDRESS = 1Ch
General Registers (R1Bh–R1Fh)
BIT NO.
BIT NO.
Class 5 Enable Register (R1Ch)
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
TYPE
TYPE
R/W
R/W
R/W
R/W
—
—
—
—
R
R
R
R
R
R
R
R
ID Register (R1Bh)
ID_CODE[4]
ID_CODE[3]
ID_CODE[2]
ID_CODE[1]
ID_CODE[0]
REV[2]
REV[1]
REV[0]
Reserved
Reserved
Reserved
Reserved
Set to 1 to enable Class 5 classification on port 4
Set to 1 to enable Class 5 classification on port 3
Set to 1 to enable Class 5 classification on port 2
Set to 1 to enable Class 5 classification on port 1
register is set to a default value of 00h. If EN_CL5 = 1,
this register is set to 0Fh. Class 5 classification can be
enabled or disabled individually for each port in auto
mode by programming the corresponding bit directly
using the software.
Register R1Dh is at this time reserved. Writing to this
register is not recommended as it is internally con-
nected. If the software needs to do a large batch
write command using the address autoincrement func-
tion, write a code of 00h to this register to safely
autoincrement past it, and then continue the write
commands as normal.
DESCRIPTION
DESCRIPTION
Reserved Register (R1Dh)