max5965a Maxim Integrated Products, Inc., max5965a Datasheet - Page 32

• Manufacturer Part Number: max5965a
• Description: High-power, Quad, Monolithic, Pse Controllers For Power Over Ethernet
• Manufacturer: Maxim Integrated Products, Inc.

High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
PGOOD_ is set to 1 (Table 14) at the end of the power-
up startup period if the power-good condition is met (0
< (V
must remain valid for more than t
PGOOD_. PGOOD_ is reset to 0 whenever the output
falls out of the power-good condition. A fault condition
immediately forces PGOOD_ low.
A3, A2, A1, A0 (Table 15) represent the 4 LSBs of the
MAX5965A/MAX5965B address (Table 4). During a
reset, the device latches into R11h. These 4 bits
Table 14. Power Status Register
Table 15. Address Input Status Register
32
PGOOD4
PGOOD3
PGOOD2
PGOOD1
PWR_EN4
PWR_EN3
PWR_EN2
PWR_EN1
Reserved
Reserved
A3
A2
A1
A0
MIDSPAN
AUTO
OUT_
______________________________________________________________________________________
SYMBOL
SYMBOL
- V
EE
ADDRESS = 10h
ADDRESS = 11h
) < PG
TH
). The power-good condition
BIT
BIT
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
PGOOD
R/W
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
to assert
Power-good condition on port 4
Power-good condition on port 3
Power-good condition on port 2
Power-good condition on port 1
Power is enabled on port 4
Power is enabled on port 3
Power is enabled on port 2
Power is enabled on port 1
Reserved
Reserved
Device address, A3 pin latched-in status
Device address, A2 pin latched-in status
Device address, A1 pin latched-in status
Device address, A0 pin latched-in status
MIDSPAN input’s latched-in status
AUTO input’s latched-in status
PWR_EN_ is set to 1 when the port power is turned on.
PWR_EN_ resets to 0 as soon as the port turns off. Any
transition of PGOOD_ and PWR_EN_ bits set the corre-
sponding bit in the power event registers R02h/R03h
(Table 8). A reset sets R10h = 00h.
address from the corresponding inputs as well as the
state of the MIDSPAN and AUTO inputs. Changes to
those inputs during normal operation are ignored.
DESCRIPTION
DESCRIPTION