PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
Register 0001H: S/UNI-2488 Master Reset, Configuration, and Loopback
Bit
Type
Function
Default
Bit 15
R/W
R/W
R/W
R/W
R/W
DRESET
ARESET
TXDINV
RXDINV
DISCOR
Unused
Unused
Unused
Unused
PL3EN
MODE[1]
MODE[0]
LOOPT
PDLE
0
0
0
0
1
X
X
X
X
0
0
0
0
0
0
0
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
SDLE
SLLE
This register allows the configuration of S/UNI-2488 features.
SLLE:
The SLLE bit enables the S/UNI-2488 line loopback mode when the device is configured for
2488.32 Mbit/s serial line interface mode of operation. When SLLE is a logic one, the
recovered data from the receive serial RXD+/- differential inputs is mapped to the TXD+/-
differential outputs. The SDLE and the SLLE bits should not be set high simultaneously.
SDLE:
The SDLE bit enables the serial diagnostic loopback. When SDLE is a logic one, the transmit
serial stream on the TXD+/- differential outputs is internally connected to the received serial
RXD+/- differential inputs. The SDLE and the SLLE bits should not be set high
simultaneously.
PDLE:
The Parallel Diagnostic Loopback, PDLE bit enables the S/UNI-2488 diagnostic loopback
where the TRMP block is directly connected to its RRMP block. When PDLE is logic one,
loopback is enabled. Under this operating condition, the S/UNI-2488 continues to operates
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
99
PMC [ PMC-SIERRA, INC ]
