High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
46   ______________________________________________________________________________________
ADDR
REGISTER NAME
R/W    PORT
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
RESET
STATE
MAXIM RESERVED
20h
Reserved
G
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
21h
Reserved
G
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
22h
Reserved
G
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
23h
Program
R/W
4321
Reserved
Reserved
CLC_EN
DET_BY
OSCF_RS
AC_TH[2]
AC_TH[1]
AC_TH[0]
24h
High-Power Mode
R/W
G
Reserved
HP[2]
HP[1]
HP[0]
Reserved
Reserved
Reserved
Reserved
0000,0000
25h
Reserved
G
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
0000,0000
26h
Reserved
G
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
0000,0000
27h
Reserved
G
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
28h
Reserved
G
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
29h
Miscellaneous
Configuration 2
R/W
1234
Reserved
Reserved
Reserved
Reserved
Reserved
LSC_EN
IVEE[1]
IVEE[0]
0000,0000
2Ah
ICU T Regi ster
s 1 and 2   R/W
21
Reserved
ICUT2[2]
ICUT2[1]
ICUT2[0]
Reserved
ICUT1[2]
ICUT1[1]
ICUT1[0]
0000,0000
2Bh
ICU T Regi ster
s 3 and 4   R/W
43
Reserved
ICUT4[2]
ICUT4[1]
ICUT4[0]
Reserved
ICUT3[2]
ICUT3[1]
ICUT3[0]
0000,0000
CLASSIFICATION STATUS REGISTERS
2Ch
Port 1 Class
RO
1
Reserved
Reserved
CLS1[5]
CLS1[4]
CLS1[3]
CLS1[2]
CLS1[1]
CLS1[0]
0000,0000
2Dh
Port 2 Class
RO
2
Reserved
Reserved
CLS2[5]
CLS2[4]
CLS2[3]
CLS2[2]
CLS2[1]
CLS2[0]
0000,0000
2Eh
Port 3 Class
RO
3
Reserved
Reserved
CLS3[5]
CLS3[4]
CLS3[3]
CLS3[2]
CLS3[1]
CLS3[0]
0000,0000
2Fh
Port 4 Class
RO
4
Reserved
Reserved
CLS4[5]
CLS4[4]
CLS4[3]
CLS4[2]
CLS4[1]
CLS4[0]
0000,0000
CURRENT REGISTER
30h
Current Port 1 (MSB)
RO
1
IPD1[8]
IPD1[7]
IPD1[6]
IPD1[5]
IPD1[4]
IPD1[3]
IPD1[2]
IPD1[1]
0000,0000
31h
Current Port 1 (LSB)
RO
1
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
IPD1[0]
0000,0000
32h
Current Port 2 (MSB)
RO
2
IPD2[8]
IPD2[7]
IPD2[6]
IPD2[5]
IPD2[4]
IPD2[3]
IPD2[2]
IPD2[1]
0000,0000
33h
Current Port 2 (LSB)
RO
2
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
IPD2[0]
0000,0000
34h
Current Port 3 (MSB)
RO
3
IPD3[8]
IPD3[7]
IPD3[6]
IPD3[5]
IPD3[4]
IPD3[3]
IPD3[2]
IPD3[1]
0000,0000
35h
Current Port 3 (LSB)
RO
3
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
IPD3[0]
0000,0000
36h
Current Port 4 (MSB)
RO
4
IPD4[8]
IPD4[7]
IPD4[6]
IPD4[5]
IPD4[4]
IPD4[3]
IPD4[2]
IPD4[1]
0000,0000
37h
Current Port 4 (LSB)
RO
4
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
IPD4[0]
0000,0000
Table 35. Register Summary (continued)
*UV and UVLO bits of V
EE
and V
DD
asserted depends on the order V
EE
and V
DD
supplies are brought up.
A = AUTO pin state before reset.
M = MIDSPAN state before reset.
A3...0 = ADDRESS input states before reset.