PM4328-PI PMC-Sierra, Inc., PM4328-PI Datasheet - Page 161
PM4328-PI
Manufacturer Part Number
PM4328-PI
Description
Framer, T1|E1|T3 Standard Format, 324-BGA
Manufacturer
PMC-Sierra, Inc.
Datasheet
1.PM4328-PI.pdf
(250 pages)
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STANDARD PRODUCT
DATASHEET
PMC-2011596
12.6 T1 Automatic Performance Report Format
PROPRIETARY AND CONFIDENTIAL
the processing required at each point is described in the following paragraphs.
The actual interrupt signal, INTB, is active low and will be the inverse of the INT
signal shown in Figure 16. Also in this example, the programmable fill level set
point is set at 8 bytes by writing this value into the INTC[6:0] bits of the RDLC
Interrupt Control register.
At points 1 and 5 the first flag after all ones or abort is detected. A dummy byte
is written in the FIFO, FE goes low, and an interrupt goes active. When the
interrupt is detected by the processor it reads the dummy byte, the FIFO
becomes empty, and the interrupt is removed. The LINK ACTIVE (LA) software
flag is set to logic 1.
At points 2 and 6 the last byte of a packet is detected and interrupt goes high.
When the interrupt is detected by the processor, it reads the data and status
registers until the FIFO becomes empty. The interrupt is removed as soon as
the RDLC Status register is read, since the FIFO fill level of 8 bytes has not been
exceeded. It is possible to store many packets in the FIFO and empty the FIFO
when the FIFO fill level is exceeded. In either case the processor should use
this interrupt to count the number of packets written into the FIFO. The packet
count or a software time-out can be used as a signal to empty the FIFO.
At point 3 the FIFO fill level of 8 bytes is exceeded and interrupt goes high.
When the interrupt is detected by the processor it must read the data and status
registers until the FIFO becomes empty and the interrupt is removed.
At points 4 or 7 an abort character is detected, a dummy byte is written into the
FIFO, and interrupt goes high. When the interrupt is detected by the processor it
must read the data and status registers until the FIFO becomes empty and the
interrupt is removed. The LINK ACTIVE software flag is cleared.
Table 8: Performance Report Message Structure and contents
Octet No.
1
2
3
4
5
6
7
8
Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
G3
G3
FE
FE
ISSUE 1
SE
SE
LV
LV
G4
G4
LB
LB
SAPI
CONTROL
TEI
G1
G1
U1
U1
FLAG
148
U2
U2
R
R
G5
G2
G5
G2
C/R
Nm
Nm
SL
SL
EA
EA
G6
G6
HIGH DENSITY T1/E1 FRAMER
NI
NI
AND M13 MULTIPLEXER
PM4328 TECT3
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