4-Port PoE Manager

Microsemi Proprietary and Confidential. PD69104B1/F Datasheet Revision 2.0

6

CONST

Bits

ADDR3

Slave 1 Bit

ADDR2

Slave 0 Bit

ADDR1

ID1 Bit

ADDR0

ID0 Bit

I²C/UART Address

0 1 0

1

0

0

1

0101001b

0 1 0

1

0

1

0

0101010b

0 1 0

1

0

1

1

0101011b

0 1 0

1

1

0

0

0101100b

0 1 0

1

1

0

1

0101101b

0 1 0

1

1

1

0

0101110b

0 1 0

1

1

1

1

0101111b

Address 0000000b is the global address in extended mode operation I²C (MODE<1:0>='00').

Address 0110000b is the global address in semi-auto mode operations (MODE<1:0>='01' or '11').

All the slaves respond to the global address.

Avoid global read transactions.

Address 0001100b is used for extended PoE address (alert response address) in semi-auto mode

operations.

When reading from this alert response address, only slaves that assert the Int_out pin will send bytes

that consist of their own addresses.

3.12

Mode of Operation

The following table lists the modes of operation for the PD69104B1/F device.

Table 2 • Mode of Operation

Mode

1

Mode

0

Mode

Comm to the

IC

Functionality

Remarks

0

0

MSCC

extended

auto

mode

I²C or UART

(see

COMM_MODE

pin)

Fully autonomous operation

without a need for Host Controller

(MCU). This mode supports

extended registers map.

Default operation—with no

interrupt function (interrupt can

be enabled by communication

command).

I²C or UART Protocol to host

with extended register map

and power management

(PM) support.

0

1

Semi-

auto

mode

I²C or UART

(see

COMM_MODE

pin)

Host should manage the ports.

I²C Protocol to host.

3.13

I²C Communication Functional Description

The following illustration shows the I²C communication format of the data write/read access for the

PD69104B1/F device.