Instruction Manual

MAX5945
when the port is already powered and during shut-
down. PWR_OFF_ is ignored when the port is already
off and during shutdown. After execution, the bits reset
to 0. During detection or classification, if PWR_ON_
goes high, the MAX5945 gracefully terminates the cur-
rent operation and turn-on power to the port. The
MAX5945 ignores the PWR_ON_ in AUTO mode. A
reset sets R19h = 00h.
Quad Network Power Controller
for Power-Over-LAN
30 ______________________________________________________________________________________
ADDRESS = 17h
SYMBOL BIT R/W
DESCRIPTION
INT_EN 7 R/W A logic high enables INT functionality
RSTR_EN 6 R A logic high enables the autorestart protection time off (as set by the RSRT[1:0] bits)
Reserved 5 R Reserved
Reserved 4 R Reserved
POFF_CL 3 R A l og i c hi g h p r events p ow er - up after a cl assi fi cati on fai l ur e ( I > 50m A, val i d onl y i n AU TO m od e)
CL_DISC 2 R/W
A logic high enables reduced current-limit voltage threshold (V
FLT_LIM
) according to port
classification result
Reserved 1 R/W Reserved
Reserved 0 R/W Reserved
Table 20. Miscellaneous Configurations
ADDRESS = 19h
SYMBOL BIT R/W
DESCRIPTION
PWR_OFF4 7 W A logic high powers off port 4
PWR_OFF3 6 W A logic high powers off port 3
PWR_OFF2 5 W A logic high powers off port 2
PWR_OFF1 4 W A logic high powers off port 1
PWR_ON4 3 W A logic high powers on port 4
PWR_ON3 2 W A logic high powers on port 3
PWR_ON2 1 W A logic high powers on port 2
PWR_ON1 0 W A logic high powers on port 1
Table 21. Power Enable Pushbuttons
ADDRESS = 1Ah
SYMBOL BIT R/W
DESCRIPTION
CLR_INT 7 W A logic high clears all interrupts
Reserved 6 Reserved
Reserved 5 Reserved
RESET_IC 4 W A logic high resets the MAX5945
RESET_P4 3 W A logic high softly resets port 4
RESET_P3 2 W A logic high softly resets port 3
RESET_P2 1 W A logic high softly resets port 2
RESET_P1 0 W A logic high softly resets port 1
Table 22. Global Pushbuttons