Ethernet Interface: Ethernet Address

ETHERNET ADDRESS

The Ethernet address for your board is a unique identifier on a network and must not be altered. The address consists of 48 (MAC[47:0]) bits divided into two equal parts. The upper 24 bits define a unique identifier that has been assigned to Emerson Network Power by IEEE. The lower 24 bits are defined by Emerson for identification of each of our products.

The Ethernet address for the PmPPC7448 is a binary number referenced as 12 hexadecimal digits separated into pairs, with each pair representing eight bits. The address assigned to the PmPPC7448 has the following form:

00 80 F9 xx yy zz

00 80 F9 is Emerson’s identifier. The last three bytes of the Ethernet address comprise the data for the Ethernet addresses in non-volatile memory (NVRAM). The PmPPC7448 has been assigned the Ethernet address range 00:80:F9:81:00:00 to 00:80:F9:83:FF:FF. The for- mat is shown in Table 6-1.

Table 6-1:Ethernet Port Address Numbering

 

 

 

 

Ethernet

Offset:

MAC:

Description:

Identifier (Hex):

Byte 5

15:0

LSB of (serial number -1000)

 

 

 

 

Byte 4

MSB of (serial number -1000)

 

 

 

 

 

 

 

 

Port 2

(front panel debug port, portdbg)

83

 

 

 

 

 

Byte 3

23:16

Port 1

(portb)

82

 

 

 

 

 

 

 

Port 0

(porta)

81

 

 

 

 

 

Byte 2

 

 

 

F9

 

 

 

 

Byte 1

47:24

Assigned to Emerson by IEEE

80

 

 

 

 

 

Byte 0

 

 

 

00

 

 

 

 

 

The last pair of hex numbers correspond to the following formula: n — 1000, where n is the unique serial number assigned to each board. For example, if the serial number of a PmPPC7448 is 2867, the calculated value is 1867 (74B16). Therefore, the board’s port 1 Ethernet address is 00:80:F9:82:07:4B.

ETHERNET CONNECTION (P1)

The Micrel KSZ8721CL 10/100 PHY (port 2) signals are routed to the P1 connector. P1 is a mini-USB connector available at the front panel. See Table 6-2below. The Ethernet cable (Emerson part number C0007666-00) is shown in Fig. 6-1.

6-2

PmPPC7448 User’s Manual

10006757-02

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Emerson PMPPC7448 user manual Ethernet Interface Ethernet Address, Ethernet Connection P1