S/UNI®-JET Data Sheet
Released
Register 350H: RDLC Configuration
Bit
Type
Function
Unused
Unused
Unused
Reserved
MEN
MM
TR
EN
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
X
X
X
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
EN
The EN bit controls the overall operation of the RDLC. When EN is set to logic one, RDLC
is enabled; when set to logic zero, RDLC is disabled. When RDLC is disabled, the RDLC
FIFO buffer and interrupts are all cleared. When RDLC is enabled, it will immediately begin
looking for flags.
TR
Setting the terminate reception (TR) bit to logic one forces the RDLC to immediately
terminate the reception of the current data frame, empty the RDLC FIFO buffer, clear the
interrupts, and begin searching for a new flag sequence. The RDLC handles a terminate
reception event in the same manner as it would the toggling of the EN bit from logic one to
logic zero and back to logic one. Thus, the RDLC state machine will begin searching for
flags. An interrupt will be generated when the first flag is detected. The TR bit will reset itself
to logic zero after the register write operation is completed and a rising and falling edge
occurs on the internal datalink clock input. If the RDLC Configuration Register is read after
this time, the TR bit value returned will be logic zero.
MEN
Setting the Match Enable (MEN) bit to logic one enables the detection and storage in the
RDLC FIFO of only those packets whose first data byte matches either of the bytes written to
the Primary or Secondary Match Address Registers, or the universal all-ones address. When
the MEN bit is logic zero, all packets received are written into the RDLC FIFO.
MM
Setting the Match Mask (MM) bit to logic one ignores the PA[1:0] bits of the Primary
Address Match Register, the SA[1:0] bits of the Secondary Address Match Register, and the
two least significant bits of the universal all-ones address when performing the address
comparison.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990267, Issue 3
175
PMC [ PMC-SIERRA, INC ]
