DS33R41 Maxim Integrated Products, DS33R41 Datasheet - Page 166

• Manufacturer Part Number: DS33R41
• Description: Network Controller & Processor ICs Inverse-Multiplexing Ethernet Mapper wit
• Manufacturer: Maxim Integrated Products

12.6 Ethernet Interface Registers
The Ethernet Interface registers are used to configure RMII/MII bus operation and establish the MAC parameters
as required by the user. The MAC Registers cannot be addressed directly from the processor port. The registers
below are used to perform indirect read or write operations to the MAC registers. The MAC Status Registers are
shown in
12.6.1 Ethernet Interface Register Bit Descriptions
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 7 to 0: MAC Read Address (MACRA7 to MACRA0). Low byte of the MAC address. Used only for read
operations.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 7 to 0: MAC Read Address (MACRA15 to MACRA0). High byte of the MAC address. Used only for read
operations.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 7 to 0: MAC Read Data 0 (MACRD7 to MACRD0). One of four bytes of data read from the MAC. Valid after a
read command has been issued and the SU.MACRWC.MCS bit is zero.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 7 to 0: MAC Read Data 1 (MACRD15 to MACRD0). One of four bytes of data read from the MAC. Valid after
a read command has been issued and the SU.MACRWC.MCS bit is zero.
Table
MACRD7
MACRA7
MACRA1
MACRD15
12-6. Accessing the MAC Registers is described in Section 9.13.
7
0
7
5
0
7
0
7
0
MACRA6
MACRD6
MACRA1
MACRD14
6
0
6
0
6
0
6
4
0
SU.MACRADL
MAC Read Address Low Register
140h
SU.MACRADH
MAC Read Address High Register
141h
SU.MACRD0
MAC Read Data Byte 0
142h
SU.MACRD1
MAC Read Data Byte 1
143h
MACRD5
MACRA5
MACRA1
MACRD13
5
0
5
0
5
0
5
3
0
MACRD4
MACRA4
MACRD12
MACRA1
166 of 335
0
0
0
4
4
4
4
2
0
MACRA3
MACRD3
MACRD11
MACRA1
3
0
3
0
3
0
3
1
0
MACRD2
MACRA2
MACRD10
MACRA1
2
0
2
0
2
0
2
0
0
MACRA1
MACRD1
MACRA9
MACRD9
1
0
1
0
1
0
1
0
MACRD0
MACRA0
MACRA8
MACRD8
0
0
0
0
0
0
0
0