Released
Datasheet
PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATM Traffic Management Device
9.3.1.9 TX_CH_STATE (Internal Structure)
Address: Ch (30h byte)
Type: Read/Write
Format: Refer to the following table.
Field (Bits)
Description
TX_CH_AAL5_STATE
(31:30)
If TX_CH_RESEQ_TYPE = 00b (refer to “TX_CH_RESEQ_TYPE” on page 190), the
current AAL5 congestion state.
00b The last cell received was not an end-of-frame and was not dropped.
01b The last cell received was an end-of-frame.
10b The last cell received was dropped.
11b Undefined.
Initialize to 00b. This field is maintained by a state machine and is read-only after initial-
ization.
TX_CH_CELL_RECEIVED
(29)
A cell was received for this channel. Initialize to 0. This bit may not be cleared.
Reserved
(28)
Initialize to 0 at initial setup. Software modifications to this location after setup may
cause incorrect operation.
TX_CH_IN_DROPPING
(27)
History bit that contains the result of past congestion management action when in 2-cell
resequencing. Initialize to 0.
Reserved
(26:22)
Initialize to 0 at initial setup. Software modifications to this location after setup may
cause incorrect operation.
TX_CH_RUN_START_SN
(21:16)
Sequence number where the next run will start. Initialize to “01h”.
TX_CH_CONGESTED
(15)
1
0
This channel is currently congested.
This channel is currently not congested.
Initialize to 0.
This field is maintained by a state machine and is read-only after initialization.
TX_CH_CUR_QD
(14:0)
Current per-channel queue depth. Initialize to 0000h. This field is maintained by a state
machine and is read-only after device initialization.
191