Table 193: Mac Receive Channel Select Map Registers; Table 194: Mac Mii Management Interface Registers - Broadcom BCM1250 User Manual

User Manual
10/21/02
mac_chlo0_0 - 00_1006_4300 mac_chlo0_1 - 00_1006_5300 mac_chlo0_2 - 00_1006_6300
mac_chlo1_0 - 00_1006_4308 mac_chlo1_1 - 00_1006_5308 mac_chlo1_2 - 00_1006_6308
mac_chlo2_0 - 00_1006_4310 mac_chlo2_1 - 00_1006_5310 mac_chlo2_2 - 00_1006_6310
mac_chlo3_0 - 00_1006_4318 mac_chlo3_1 - 00_1006_5318 mac_chlo3_2 - 00_1006_6318
mac_chup0_0 - 00_1006_4320 mac_chup0_1 - 00_1006_5320 mac_chup0_2 - 00_1006_6320
mac_chup1_0 - 00_1006_4328 mac_chup1_1 - 00_1006_5328 mac_chup1_2 - 00_1006_6328
mac_chup2_0 - 00_1006_4330 mac_chup2_1 - 00_1006_5330 mac_chup2_2 - 00_1006_6330
mac_chup3_0 - 00_1006_4338 mac_chup3_1 - 00_1006_5338 mac_chup3_2 - 00_1006_6338
Bits Name Default
63:0 map 64'b0
Bits Name Default
0 mdc 1'b0
1 mdio_dir 1'b0
2 mdio_out 1'b0
3 genc 1'b0
4 mdio_in 1'b0
63:5 reserved 59'b0
Document 1250_1125-UM100CB-R

Table 193: MAC Receive Channel Select Map Registers

This register is used in both Ethernet and Packet FIFO modes
These registers form the table for mapping the 8 bits from a received packet into a two bit
channel number. The 256 entry table has bit 0 register 0 as entry 0, and bit 63 register 3 as
entry 255. The chup register provides the msb and the chlo register the lsb of the channel
number.

Table 194: MAC MII Management Interface Registers

mac_mdio_0 - 00_1006_4428
mac_mdio_1 - 00_1006_5428
mac_mdio_2 - 00_1006_6428
This register is used in both Ethernet and Packet FIFO modes
MII Management interface clock, this bit is copied to the MDC pin.
MII Management Data Direction, when set the mdio pin is an input, when clear the mdio pin
is driven from the mdio_out bit. This bit must be clear to allow receive flow control to be output
when the interface is configured for encoded packet fifo mode operation.
MII Management interface data out, this bit is copied to the MDIO pin if the mdio_dir bit is 0.
General output, this bit is copied to the GENO pin.
MII Management interface data input, this read only bit gives the value on the mdio pin.
Reserved
B r oadco m C orp or ati on
BCM1250/BCM1125/BCM1125H
Description
Description
Section 9: Ethernet MACs Page 317