Released
Datasheet
PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATM Traffic Management Device
7.2.5 SWITCH_CONFIG
Address: 4h (10h byte)
Type: Read/Write
Format: Refer to the following table.
Field (Bits)
Description
Not used
(31:20)
Write with a 0 to maintain software compatibility with future versions.
ENABLE_PORT(3:0)
(19:16)
Bit 19 corresponds to port 3, bit 18 corresponds to port 2, bit 17 corresponds to port 1 and bit
16 corresponds to port 0 as follows:
1
Enable the switch fabric port, and allow cells to be sent to it. Also, if SF_LOOP
(refer to “SF_LOOP” on page 103) is asserted, replicate the looped back cells
out onto the switch fabric.
0
Disable the switch fabric port. Send no cells to it.
Resets to 0.
CLEAR_UPPER_VPI
(15)
1
0
Clears VPI(11:8) bits for all incoming (Rx) cells
Not clear VPI(11:8) bits for all incoming (Rx) cells
Resets to 0.
ENFORCE_UNUSED_VCI
(14)
1
0
Drop cells with any non-zero value set in the unused VCI bits.
Do not check for non-zero value in the unused VCI bits
Resets to 0.
TX_COUNT_SENT_CLP
(13)
1
0
Store the CLP = 0 sent cells in TX_CELLS_SENT. Store the CLP = 1 sent cells
in TX_CH_CELLS_DROPPED for all channels (refer to
“TX_CH_CELLS_SENT” on page 193 and “TX_CH_CELLS_DRPD” on page
193).
Use the TX_CELLS_SENT and TX_CH_CELLS_DRPD counters as docu-
mented in “TX_CH_CELLS_SENT” on page 193 and
“TX_CH_CELLS_DRPD” on page 193 respectively.
Reserved
(12:8)
Initialize to 0 at initial setup. Software modifications to these locations after setup may cause
incorrect operation.
TIME_SLOT_PRIORITY
(7)
1
Automatically increment the RX_CH_SWITCH_GROUP “RX_CH_CONFIG”
on page 184 by 1 (1 to 2, and 2 to 3, 3 will not be incremented) when an Unicast
cell was selected from the RX_SERVICE_TABLE (“RX_SERVICE_TABLE”
on page 182). RX_CH_SWITCH_GROUP is used to set the PRIORITY(1:0)
field in the SE_D_OUT “QRT-QSE Interface Cell Format.” on page 91 nibble 1.
Use the RX_CH_SWITCH_GROUP value for PRIORITY “RX_CH_CONFIG”
on page 184
0
Resets to 0.
GLOBAL_SF_SPARE
(6)
1
Set the SF_SPARE (“QRT-QSE Interface Cell Format.” on page 91) bit to 1
(nibble 0 of the SE_D_OUT) for all cells sent to the switch fabric
Use the RX_CH_SF_SPARE “RX_CH_CONFIG” on page 184 value in the
RX_CH_CONFIG(4) word for the SF_SPARE bit
0
Resets to 0.
106
PMC [ PMC-SIERRA, INC ]
