FW82801EB Intel, FW82801EB Datasheet - Page 290

• Manufacturer Part Number: FW82801EB
• Manufacturer: Intel

Specifications of FW82801EB

• Lead Free Status / RoHS Status: Not Compliant

LAN Controller Registers (B1:D8:F0)
290
7:4
2:0
Bit
3
Command Unit Command (CUC) — R/W. Valid values are listed below. All other values are
Reserved.
0000 = NOP: Does not affect the current state of the unit.
0001 = CU Start : Start execution of the first command on the CBL. A pointer to the first CB of the
0010 = CU Resume: Resume operation of the Command unit by executing the next command. This
0011 = CU HPQ Start: Start execution of the first command on the high priority CBL. A pointer to the
0100 = Load Dump Counters Address: Indicates to the device where to write dump data when
0101 = Dump Statistical Counters: Tells the device to dump its statistical counters to the area
0110 = Load CU Base: The device’s internal CU Base Register is loaded with the value in the CSB
0111 = Dump and Reset Statistical Counters: Indicates to the device to dump its statistical
1010 = CU Static Resume: Resume operation of the Command unit by executing the next
1011 = CU HPQ Resume: Resume execution of the first command on the HPQ CBL. this command
Reserved
Receive Unit Command ( RUC) — R/W. Valid values are:
000 = NOP: Does not affect the current state of the unit.
001 = RU Start: Enables the receive unit. The pointer to the RFA must be placed in the SCB
010 = RU Resume: Resume frame reception (only when in suspended state).
011 = RCV DMA Redirect: Resume the RCV DMA when configured to “Direct DMA Mode.” The
100 = RU Abort: Abort RU receive operation immediately.
101 = Load Header Data Size (HDS): This value defines the size of the Header portion of the RFDs
110 = Load RU Base: The device’s internal RU Base Register is loaded with the value in the SCB
111 = RBD Resume: Resume frame reception into the RFA. This command should only be used
General POinter before using this command. The device pre-fetches the first RFD and the first
RBD (if in flexible mode) in preparation to receive incoming frames that pass its address
filtering.
buffers are indicated by an RBD chain which is pointed to by an offset stored in the General
Pointer Register (this offset will be added to the RU Base).
or Receive buffers. The HDS value is defined by the lower 14 bits of the SCB General Pointer,
so bits 31:15 should always be set to 0s when using this command. Once a Load HDS
command is issued, the device expects only to find Header RFDs, or be used in “RCV Direct
DMA mode” until it is reset. Note that the value of HDS should be an even, non-zero number.
General Pointer.
when the RU is already in the “No Resources due to no RBDs” state or the “Suspended with
no more RBDs” state.
CBL should be placed in the SCB General Pointer before issuing this command. The CU
Start command should only be issued when the CU is in the Idle or Suspended states (never
when the CU is in the active state), and all of the previously issued Command Blocks have
been processed and completed by the CU. Sometimes it is only possible to determine that
all Command Blocks are completed by checking that the Complete bit is set in all previously
issued Command Blocks.
command will be ignored if the CU is idle.
first CB of the HPQ CBL should be placed in the SCB General Pointer before issuing this
command.
using the Dump Statistical Counters or Dump and Reset Statistical Counters commands.
This command must be executed at least once before any usage of the Dump Statistical
Counters or Dump and Reset Statistical Counters commands. The address of the dump
area must be placed in the General Pointer register.
designated by the Load Dump Counters Address command.
General Pointer.
counters to the area designated by the Load Dump Counters Address command, and then
to clear these counters.
command. This command will be ignored if the CU is idle. This command should be used
only when the CU is in the Suspended state and has no pending CU Resume commands.
will be ignored if the HPQ was never started.
Intel
Description
®
82801EB ICH5 / 82801ER ICH5R Datasheet