L-ET4148-50C-DB LSI, L-ET4148-50C-DB Datasheet - Page 167

• Manufacturer Part Number: L-ET4148-50C-DB
• Manufacturer: LSI

Specifications of L-ET4148-50C-DB

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Preliminary Data Sheet
April 2006
Appendix A: Registers
Packet_Buffer_Ind
Table 220. Packet_Buffer_Ind Field Parameters (continued)
Various indications to the supervisor regarding packet_buffer. These indications may be masked by
Packet_Buffer_Ind_Mask.
Agere Systems Inc.
free_buffer_list_empty
free_descriptor_list_empty
queue_full
rate_adaptation_fifo_overflow
packet_buffer_ind_mask[6:0]
packet_buffer_ind_mask_set[6:0]
packet_buffer_ind_mask_clear[6:0]
packet_buffer_int[6:0]
packet_buffer_int_mask[6:0]
packet_buffer_int_mask_set[6:0]
packet_buffer_int_mask_clear[6:0]
Field Name
(continued)
(continued)
Single-Chip 48 x 1 Gbit/s + 2 x 10 Gbits/s Layer 2+ Ethernet Switch
Offset = 12.25
Offset = 16.25
Offset = 20.25
Offset = 24.25
Offset = 28.25
Instances = 1
Instances = 1
Instances = 1
Instances = 1
Instances = 1
Instances = 1
Instances = 1
Instances = 1
Instances = 1
Instances = 1
Instances = 1
Offset = 0.28
Offset = 0.29
Offset = 0.30
Offset = 0.31
Offset = 4.25
Offset = 8.25
Mode = R/W
Mode = R/W
Mode = R/W
Mode = R/W
Parameters
Mode = WO
Mode = WO
Mode = WO
Mode = WO
Mode = RO
Mode = RO
Mode = RO
Agere Systems - Proprietary
If a packet is discarded due to an exhaustion of free buffers,
this indication is asserted. This indication is reset by writing a
one to this bit location.
If a packet is discarded due to an exhaustion of free descrip-
tors, this indication is asserted. This indication is reset by
writing a one to this bit location.
If a packet is discarded due to full queue, this indication is
asserted. The identity of the queue that caused this indica-
tion is determined by reading
Packet_Buffer_Queue_Full_Info. This indication is
reset by writing a one to this bit location.
If a packet is discarded due to an overflow of the rate adapta-
tion FIFO (used during multicast replication), this indication is
asserted. This indication is reset by writing a one to this bit
location.
This field provides the supervisor with the current settings of
the indication mask. Bits asserted in this field prevent the
indication bits listed above from becoming asserted. Bits in
packet_buffer_ind_mask[6:0] are set and cleared via
the fields packet_buffer_ind_mask_set[6:0] and
packet_buffer_ind_mask_clear[6:0] below.
Writing ones to bits in this field causes the corresponding bits
to become asserted in packet_buffer_ind_mask[6:0].
Writing ones to bits in this field causes the corresponding bits
to become deasserted in
packet_buffer_ind_mask[6:0].
The unmasked indication bits that are also not masked by
packet_buffer_int_mask[6:0] are revealed to the
supervisor via this field.
This field provides the supervisor with the current settings of
the indication mask. Bits asserted in this field prevent the
interrupt bits in packet_buffer_int[6:0] from becoming
asserted. Bits in packet_buffer_int_mask[6:0] are set
and cleared via the fields
packet_buffer_int_mask_set[6:0] and
packet_buffer_int_mask_clear[6:0] below.
Writing ones to bits in this field causes the corresponding bits
to become asserted in packet_buffer_int_mask[6:0].
Writing ones to bits in this field causes the corresponding bits
to become deasserted in
packet_buffer_int_mask[6:0].
Description
ET4148-50
167