PM5380-BI PMC-Sierra, Inc., PM5380-BI Datasheet - Page 325

• Manufacturer Part Number: PM5380-BI
• Description: Network Interface, SATURN User Network Interface (8x155) Telecom Standard Product
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC- 2010299, Issue 2
Register 0x1020: RUL3 Interface Configuration
FIFORST:
RCA_INV:
RPRTYP:
L3MODEINV:
The FIFORST bit is used to reset the system interface channel receive FIFOs. When
FIFORST is set low, the channel receive FIFOs operate normally. When FIFORST is set
high, the channel receive FIFOs are immediately emptied. The channel FIFOs remain
empty and continue to ignore read operations until a logic zero is written to FIFORST.
The RCA output should be low when FIFORST is set high to prevent the Level 3 interface
from falsely reporting data in the FIFOs.
The RCA_INV bit is used to invert the polarity of the RCA output. When RCA_INV is set
low, the RCA output operates normally. When RCA_INV is set high, the polarity of the
control signals inverts. Therefore, when RCA_INV is set high, an empty channel FIFO is
identified by RCA set high.
The RPRTYP bit selects even or odd parity for the RPRTY output on the transmit Level 3
interface. When RPRTYP is set high, the RPRTY input is the even parity for inputs
RDAT[31:0]. When RPRTYP is set low, the RPRTY input is odd party for inputs
RDAT[31:0].
The L3MODE invert register bit provides a method to override the POS_ATMB input using
software in the transmit direction. The value of the POS_ATMB input is logically XOR’ed
with the value of the L3MODEINV register bit to determine the mode of the recieve Level
3 interface.
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Type
R
R/W
R/W
R/W
R/W
R/W
Function
L3MODE
L3MODEINV
Reserved
Unused
Unused
RPRTYP
RCA_INV
FIFORST
S/UNI®-8x155 ASSP Telecom Standard Product Data Sheet
Default
X
0
0
X
X
0
0
1
Released
325