S/UNI®-8x155 ASSP Telecom Standard Product Data Sheet
Released
Register 0x099, 0x199, 0x299, 0x399, 0x499, 0x599, 0x699, 0x799:
JAT Configuration #2
Bit
Type
R/W
Function
Reserved
Unused
CHAN[1]
CHAN[0]
FRST
Reserved
Reserved
FORCE55
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
1
X
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
FORCE55:
The diagnostic serial transmit enable (FORCE55) forces the outgoing serial transmit stream
to alternating ones and zeros. When FORCE55 is set high, the serial transmit stream is a
77.76MHz clock. When FORCE55 is set low, the serial interface operates normally.
Reserved:
The reserved bit must be programmed to default values for proper operation.
FRST:
The line loopback FIFO reset control allows the line loopback path to be initialized. When
FRST is high, the bit FIFO in the line loopback path in the JAT is held in reset. When
FRST is low, the FIFO operates normally.
The FRST control should be toggled when the receive interface experiences severe errors
such as loss of frame (LOF) or loss of signal (LOS) during SLLE operation.
CHAN[1:0]:
The channel loopback configuration (CHAN[1:0]) allows the JAT to loop back other
channel receive data. When CHAN[1:0] is “00”, the SLLE and SDLE registers operate
normally. Setting CHAN[1:0] to other values selects one of the three other channels (in the
group of 4) in SLLE mode of operation.
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC- 2010299, Issue 2
246
PMC [ PMC-SIERRA, INC ]
