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SH7672 Datasheet(PDF) 433 Page - Renesas Technology Corp

Part # SH7672
Description  32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series
PDF  1292 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7672 Datasheet(HTML) 433 Page - Renesas Technology Corp

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Section 12 Ethernet Controller (EtherC)
Rev. 1.00 Nov. 14, 2007 Page 407 of 1262
REJ09B0437-0100
12.3.5
MAC Address High Register (MAHR)
MAHR is a 32 -bit readable/writable register that specifies the upper 32 bits of the 48-bit MAC
address. The settings in this register are normally made in the initialization process after a reset.
The MAC address setting must not be changed while the transmitting and receiving functions are
enabled. To switch the MAC address setting, return the EtherC and E-DMAC to their initial states
by means of the SWR bit in EDMR before making settings again.
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Bit:
Initial value:
R/W:
15
14
13
12
11
10
9876543210
Bit:
Initial value:
R/W:
0000000000000000
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0000000000000000
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
MA[47:32]
MA[31:16]
Bit
Bit Name
Initial
Value
R/W
Description
31 to 0 MA[47:16]
All 0
R/W
MAC Address Bits
These bits are used to set the upper 32 bits of the MAC
address.
If the MAC address is 01-23-45-67-89-AB
(hexadecimal), the value set in this register is
H'01234567.



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