RC82562EP Intel, RC82562EP Datasheet - Page 88

• Manufacturer Part Number: RC82562EP
• Description: IC ETH 10/100 PLC DEV CTRL 64BGA
• Manufacturer: Intel

Specifications of RC82562EP

• Rohs Status: RoHS non-compliant
• Controller Type: Ethernet Controller
• Interface: IEEE 802.3
• Voltage - Supply: 3.135 V ~ 3.465 V
• Mounting Type: Surface Mount
• Package / Case: 64-BGA
• Current - Supply: -
• Operating Temperature: -
• Other names: 832361

Host Software Interface
6.4.2.4
80
Figure 18. Multicast Setup Command Format
Intel 8255x 10/100 Mbps Ethernet Controller Family Open Source Software Developer Manual
In the case of a port selective reset, the execution machine maintains configuration registers for the
device. In the case of a port software reset or a hardware reset, the device reverts to the default
values.
Multicast Setup (011b)
The multicast setup command is used for loading multicast IDs into the device for filtering
purposes. As previously noted, the filtering done on the multicast IDs is not perfect and some
unwanted frames may be accepted. This command resets the current filter and reloads it with the
specified multicast IDs. The format of the multicast addresses setup command is shown below.
00h
04h
08h
0Ch
Link Address
EL (Bit 31)
S (Bit 30)
I (Bit 29)
Bits 28:19
CMD (Bits 18:16)
C (Bit 15)
OK (Bit 13)
Multicast Count
Multicast List
Offset
EL
Link Address (A31:A0)
2nd Byte
Multicast Address List
Nth Byte
S
Command Word Bits 31:16
This is the 32-bit address of the next command block. It is added to the CU base to
obtain the actual address.
If this bit is set to one, it indicates that this command block is the last one on the CBL.
The CU will go from the active to the idle state after the execution of the CB is finished.
This transition will always cause an interrupt with the CNA/CI bit set in the SCB.
If this bit is set to one, the CU will be suspended after the completion of this CB. A CNA
interrupt will be generated if the device is configured for this. The CU transitions from the
active to the suspended state after the execution of the CB.
If the I bit is set to one, the device generates an interrupt after the execution of the CB is
finished. If I is not set to one, the CX interrupt will not be generated.
These bits are reserved and should all be set to 0.
This is the multicast setup command, which has a value of 011b.
This bit indicates the execution status of the command. Software should reset this bit
before issuing the command to the device. Following a command completion, the device
sets it to one.
NOTE: The difference in the definition of the C bit for the transmit command
The OK bit indicates that the command was executed without error. If it equals one, no
error occurred (command executed OK). If the OK bit is zero and the C bit is set, then an
error occurred.
NOTE: The difference in the definition of the C bit for the transmit command
This 14-bit field indicates the number of bytes in the multicast list field. The multicast
count must be a multiple of 6 bytes; otherwise, the device reduces the multicast count to
the nearest multiple of 6. If the multicast count equals 0, it resets the hash table, which is
equivalent to disabling the multicast filtering mechanism.
This field contains a list of multicast addresses or multiple IAs to be accepted by the
device. The least significant bit of the most significant byte of each multicast address
must equal 1.
I
0000000000
(Section
(Section
1st Byte
6.4.2.5).
6.4.2.5).
011
C
X
X
X
Status Word Bits 15:0
OK
Multicast Count
XXXXXXXXXXXXX