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RELEASED
PM73122 AAL1GATOR-32
DATASHEET
PMC-1981419
ISSUE 7
32 LINK CES/DBCES AAL1 SAR PROCESSOR
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
317
When TS_EN is a ‘1’ SBI tributary to AAL1gator link mapping is enabled and
is specified by the contents of the Insert Tributary Mapping Register RAM
FIFO_UDR_EN
The FIFO_UDR_EN bit is used to enable/disable the generation of an
interrupt when a FIFO underrun is detected.
When FIFO_UDR_EN is a ‘0’ underrun interrupt generation is disabled.
When FIFO_UDR_EN is a ‘1’ underrun interrupt generation is enabled.
FIFO_OVR_EN
The FIFO_OVR_EN bit is used to enable/disable the generation of an
interrupt when a FIFO overrun is detected.
When FIFO_OVR_EN is a ‘0’ overrun interrupt generation is disabled.
When FIFO_OVR_EN is a ‘1’ overrun interrupt generation is enabled.
SYNC_INT_EN
This bit is set to enable the generation of an interrupt when a Depth Check
sync error, C1FP sync error, or SBIIP sync error is detected.
DC_EN
This bit enables the Depth Check logic. When asserted high the depth
checker logic will periodically monitor the Data/Framing FIFO Depth and
compare it against the read and write pointers. If there is a discrepancy the
tributary is reset by the depth checker. A discrepancy will normally occur any
time the SBI Insert FIFO overruns or underruns.
This function is disabled anytime any Insert Tributary has the SYNCH_TRIB
bit set.
If this bit is not set, or any Insert Tributary has the SYNCH_TRIB bit set, and
an SBI Insert FIFO overrun or underrun is reported, the tributary should be
reset by writing to the INS_TRIB_CTL register.
APAGE
The tributary mapping and control configuration RAMs active page select bit
(APAGE) controls the selection of one of two pages in the tributary mapping
RAMs to be the active page. When APAGE is set high, the configuration in
page 1 of the tributary mapping RAMs is used to associate incoming
tributaries to AAL1gator links. When APAGE is set low, the configuration in
page 0 of the tributary mapping RAMs is used to associate incoming
tributaries to Aal1gator links. Changes of the active page as a result of write