Threshold For Partially Full; Buffer Size For Transmit - Intel IXP45X Developer's Manual

Bits
31:8
7:0
6.2.13

Threshold For Partially Full

Register Name:
0xC8009038
Hex Offset Address:
FIFO Partially Full/Empty Threshold Register. The threshold is the number of 32-bit words in
Register
the FIFO.
Description:
Access: Read/Write.
31
Bits
31:8
7:0
6.2.14

Buffer Size For Transmit

Register Name:
0xC8009040
Hex Offset Address:
Register
Transmit Buffer Size
Description:
Access: Read/Write.
31
Bits
31:8
7:0
® ®
Intel IXP45X and Intel IXP46X Product Line of Network Processors
Developer's Manual
252
® ®
Intel IXP45X and Intel
Register
Name
(Reserved)
Marks the partial empty thresholds of the Transmit FIFO and Receive FIFO.
When the number of entries in the Transmit FIFO is less than or equal to the
Partial Empty contents of this register, tx_fifo_p_empty is asserted. When the number of
entries in the Receive FIFO is less than or equal to the contents of this register,
rx_fifo_p_empty is asserted.
(Reserved)
Register
Name
(Reserved)
Marks the partial full thresholds of the Transmit FIFO and Receive FIFO. When
the number of entries in the Transmit FIFO is greater than or equal to the
Partial Full contents of this register, tx_fifo_p_full is asserted. When the number of entries
in the Receive FIFO is greater than or equal to the contents of this register,
rx_fifo_p_full is asserted.
(Reserved)
Register
Name
(Reserved)
Holds minimum number of bytes of each frame that must be in the Transmit
Tx Buffer
FIFO for that frame's transmission to start.
size
If a complete frame is less than this minimum, it is always transmitted.
IXP46X Product Line of Network Processors—Ethernet MACs
threshpe
Description
threshpf
0x00000000
Reset Hex Value:
threshpf
Description
txbuffsize
0x00000000
Reset Hex Value:
txbuffsize
Description
8 7
Partial Full
8 7
Tx Buffer Size
August 2006
Order Number: 306262-004US
0
0