MAX5952 Datasheet, PDF (26/50 Pages) Maxim Integrated Products – High-Power, Quad, PSE Controller for Power-Over-Ethernet

High-Power, Quad, PSE Controller
for Power-Over-Ethernet
Register Map and Description
The interrupt register (Table 6) summarizes the event
register status and is used to send an interrupt signal
(INT goes low) to the controller. Writing a 1 to R1Ah[7]
clears all interrupt and events registers. A reset sets
R00h to 00h.
INT_EN (R17h[7]) is a global interrupt mask (Table 7).
The MASK_ bits activate the corresponding interrupt
bits in register R00h. Writing a 0 to INT_EN (R17h[7])
disables the INT output.
A reset sets R01h to AAA00A00b where A is the state
of the AUTO input prior to the reset.
Table 6. Interrupt Register
ADDRESS = 00h
SYMBOL
BIT
R/W
DESCRIPTION
SUP_FLT
7
R
Interrupt signal for supply faults. SUP_FLT is the logic OR of all the bits [7:0] in register
R0Ah/R0Bh (Table 12).
TSTR_FLT
6
R
Interrupt signal for startup failures. TSRT_FLT is the logic OR of bits [7:0] in register
R08h/R09h (Table 11).
IMAX_FLT
5
R
Interrupt signal for current-limit violations. IMAX_FLT is the logic OR of bits [3:0] in register
R06h/R07h (Table 10).
CL_END
4
R
Interrupt signal for completion of classification. CL_END is the logic OR of bits [7:4] in
register R04h/R05h (Table 9).
DET_END
3
R
Interrupt signal for completion of detection. DET_END is the logic OR of bits [3:0] in
register R04h/R05h (Table 9).
LD_DISC
PG_INT
PE_INT
2
R
Interrupt signal for load disconnection. LD_DISC is the logic OR of bits [7:4] in register
R06h/R07h (Table 10).
1
R
Interrupt signal for PGOOD status change. PG_INT is the logic OR of bits [7:4] in register
R02h/R03h (Table 8).
0
R
Interrupt signal for power-enable status change. PEN_INT is the logic OR of bits [3:0] in
register R02h/R03h (Table 8).
Table 7. Interrupt Mask Register
ADDRESS = 01h
SYMBOL
BIT
MASK7
7
MASK6
6
MASK5
5
MASK4
4
MASK3
3
MASK2
2
MASK1
1
MASK0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
DESCRIPTION
Interrupt mask bit 7. A logic-high enables the SUP_FLT interrupts. A logic-low disables the
SUP_FLT interrupts.
Interrupt mask bit 6. A logic-high enables the TSTR_FLT interrupts. A logic-low disables
the TSTR_FLT interrupts.
Interrupt mask bit 5. A logic-high enables the IMAX_FLT interrupts. A logic-low disables
the IMAX_FLT interrupts.
Interrupt mask bit 4. A logic-high enables the CL_END interrupts. A logic-low disables the
CL_END interrupts.
Interrupt mask bit 3. A logic-high enables the DET_END interrupts. A logic-low disables the
DET_END interrupts.
Interrupt mask bit 2. A logic-high enables the LD_DISC interrupts. A logic-low disables the
LD_DISC interrupts.
Interrupt mask bit 1. A logic-high enables the PG_INT interrupts. A logic-low disables the
PG_INT interrupts.
Interrupt mask bit 0. A logic-high enables the PEN_INT interrupts. A logic-low disables the
PEN_INT interrupts.
26 ______________________________________________________________________________________