DS33R41 Maxim Integrated Products, DS33R41 Datasheet - Page 168

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

Register Name:
Register Description:
Register Address:
Bit #
Name
Defaullt
Bits 7 to 0: MAC Write Data 3 (MACD31 to MACD24). One of four bytes of data to be written to the MAC. Data
has been written after a write 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 Write Address (MACAW7 to MACAW0). Low byte of the MAC address. Used only for write
operations.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 7 to 0: MAC Write Address (MACAW15 to MACAW8). High byte of the MAC address. Used only for write
operations.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 1: MAC Command RW (MCRW). If this bit is written to 1, a read is performed from the MAC. If this bit is
written to 0, a write operation is performed. Address information for write operations must be located in
SU.MACAWH
SU.MACRADL. The user must also write a 1 to the MCS bit, and the device will clear MCS when the operation is
complete.
Bit 0: MAC Command Status (MCS). Setting MCS in conjunction with MCRW will initiate a read or write to the
MAC registers. Upon completion of the read or write this bit is cleared. Once a read or write command has been
initiated the host must poll this bit to see when the operation is complete.
MACAW7
MACAW1
MACD31
and SU.MACAWL. Address information for read operations must be located in
—
7
0
7
0
7
5
0
7
0
MACAW6
MACAW1
MACD30
—
6
0
6
0
6
4
0
6
0
SU.MACWD3
MAC Write Data 3
149h
SU.MACAWL
MAC Address Write Low
14Ah
SU.MACAWH
MAC Address Write High
14Bh
SU.MACRWC
MAC Read Write Command Status
14Ch
MACAW5
MACAW1
MACD29
—
5
0
5
0
5
3
0
5
0
MACAW4
MACAW1
MACD28
168 of 335
—
0
2
0
0
4
0
4
4
4
MACAW3
MACAW1
MACD27
—
3
0
3
0
3
1
0
3
0
MACAW2
MACAW1
MACD26
—
2
0
2
0
2
0
0
2
0
MACAW1
MACAW9
MACD25
MCRW
1
0
1
0
1
0
1
0
SU.MACRADH
MACAW0
MACAW8
MACD24
MCS
0
0
0
0
0
0
0
0
and