RELEASED
PM4354 COMET-QUAD
DATASHEET
PMC-1990315
ISSUE 6
FOUR CHANNEL COMBINED E1/T1/J1
TRANSCEIVER / FRAMER
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC. AND FOR ITS CUSTOMERS’ INTERNAL USE
338
Table 64
- ESF FDL Processing
Action
Addr
Data
Effect
Write RXCE Receive Data Link 1
Control Register
028H,
128H,
228H,
328H
20H
Select extraction of ESF Facility Data
Link for HDLC receiver #1.
(Quadrant must be set up for ESF
frame format.)
Write TXCI Transmit Data Link 1
Control Register
038H,
138H,
238H,
338H
20H
Select insertion of ESF Facility Data
Link from HDLC transmitter #1.
(Quadrant must be set up for ESF
frame format.)
12.2 Servicing Interrupts
The COMET-QUAD will assert INTB to logic 0 when a condition that is configured to produce an
interrupt occurs. To find which condition caused this interrupt to occur, the procedure outlined
below should be followed:
1. Read the bits of the COMET-QUAD Master Interrupt Source register (0BCH) to identify which
quadrants generated the interrupt. For example, a logic one read in the QUAD[2] bit of the
COMET-QUAD Master Interrupt Source register indicates that quadrant #2 produced the
interrupt.
2. Read the bits of the second level Interrupt Source registers to identify the block within the
quadrant generating the interrupt.
The Interrupt Source registers for quadrant #1 are 007H-009H.
The Interrupt Source registers for quadrant #2 are 107H-109H.
The Interrupt Source registers for quadrant #3 are 207H-209H.
The Interrupt Source registers for quadrant #4 are 307H-309H.
3. Read the third level Interrupt Source registers to identify the interrupt source.
4. Service the interrupt.
5. If the INTB pin is still logic 0, then there are still interrupts to be serviced. Otherwise, all
interrupts have been serviced. Wait for the next assertion of INTB
12.3 Using the Performance Monitoring Features
The PMON blocks are provided for performance monitoring purposes. The PMON blocks within
each T1/E1 Framer slice are used to monitor T1 or E1 performance primitives. The T1/E1 PMON
event counters are of sufficient length so that the probability of counter saturation over a one
second interval is very small (less than 0.001%).