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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
292
In both cases the SBI Parity checker logic will update the SBI Parity Error
Interrupt Reason Register.
TS_EN
The TS_EN bit is used to enable the SBI tributary to SBIIP link mapping
capability when the TS_EN bit in the SBI_BUS_CFG_REG also enables
mapping.
When TS_EN is ‘0’ mapping will be fixed to a one to one mapping and will not
be programmable.
When TS_EN is ‘1’ SBI tributary to local link mapping is enabled and is
specified by the contents of the Extract Tributary Mapping Register RAM
FIFO_UDR_EN
This bit is set to enable the generation of an interrupt when a FIFO under-run
is detected.
FIFO_OVR_EN
This bit is set to enable the generation of an interrupt when a FIFO over-run
is detected.
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 check
logic will periodically monitor the Data/Framing FIFO Depth and compare it
against the write and read pointers. If there is a discrepancy the tributary is
synchronously reset by the depth checker. A discrepancy will normally occur
any time the SBI Extract FIFO overruns or underruns.
If this bit is not set, and an SBI Extract FIFO overrun or underrun is reported,
the tributary should be reset by writing to the EXT_TRIB_CTL register.
APAGE
The tributary mapping 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