PD64012 Datasheet, PDF (7/16 Pages) List of Unclassifed Manufacturers – 12-channel PoE Manager

PD64012
12-CHANNEL PoE MANAGER
PIN
PIN NAME
51. AGND
52. PORT_SENSE5
53. VPORT_NEG4
54. PORT_SENSE4
55. VPORT_NEG3
56. PORT_SENSE3
57. PORT_SENSE2
58. VPORT_NEG2
59. PORT_SENSE1
60. VPORT_NEG1
61. PORT_SENSE0
62. SENSE_NEG
63. VPORT_NEG0
64. Reserved
PIN TYPE
Supply
Analog I/O
Analog I/O
Analog I/O
Analog I/O
Analog I/O
Analog I/O
Analog I/O
Analog I/O
Analog I/O
Analog I/O
Analog I/O
Analog I/O
TBD
PIN DESCRIPTION
Analog ground
Channel current monitoring
Port 4 negative voltage feeding
Channel current monitoring
Port 3 negative voltage feeding
Channel current monitoring
Channel current monitoring
Port 2 negative voltage feeding
Channel current monitoring
Port 1 negative voltage feeding
Channel current monitoring
Port sense reference
Port 0 negative voltage feeding
Not connected
Functional Description ________
Operational Modes
The PD64012 supports two main modes of operation,
based on two different architectures, as described
hereafter. The two modes are: Enhanced mode and
Automatic mode.
Enhanced mode – in this mode of operation, the
PD64012s communicate with the PD63000 PoE
MCU (dedicated MCU for Power over Ethernet
tasks), through a Serial Parallel Interface (SPI) bus.
In this mode, all PD64012s are directly connected to
the PD63000 through the SPI, in slave mode. The
MCU is used for additional Power over Ethernet
features, such as:
♦ Legacy PDs detection (including Cisco discovery)
♦ Enhanced power management algorithms
♦ LED indicators support
♦ Port matrix control
♦ Communication protocol translator.
The switch host CPU communicates with the
PD63000, via an isolated I²C or UART bus, as shown
in Figure 3.
Host
CPU
I/O Opto
I²C or UART
SPI Bus
PD63000
PoE MCU
MOSI
MISO
SCK
CS0
CS1
CS2
CS3
PD64012
#00
CS0_N
CS1_N
PD64012
#01
CS0_N
CS1_N
PD64012
#10
CS0_N
CS1_N
Pull-down
resistor
PD64012
#11
CS0_N
CS1_N
Figure 3: Enhanced Mode
www.powerdsine.com
7
06-0003-058 (Rev. 2.8) / 5 August 2004
© PowerDsine 2003
Information in this document subject
to change without prior notice.