RELEASED
PM7351 S/UNI-VORTEX
DATA SHEET
PMC-1980582
ISSUE 5
OCTAL SERIAL LINK MULTIPLEXER
Registers 0x095, 0x0B5, 0x0D5, 0x0F5, 0x115, 0x135, 0x155, 0x175:
Serial Link Maintenance
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R/W
Reserved
Unused
Unused
RDIDIS
TXDIS
MLB
0
X
X
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
DLB
ACTIVE
ACTIVE:
The value of this bit is encoded in the ACTIVE field of the cell structure
transmitted on TXDn+/-.
DLB:
The Diagnostic Loopback enable bit allows TXDn+/- data to replace receive
data. When DLB is logic one, the upstream circuitry for the serial link is timed
off the internal transmit clock and the TXDn+/- data is multiplexed into the
upstream datapath just after the clock recovery.
MLB:
The Metallic Loopback enable bit allows RXDn+/- data to be presented on
TXD+/-. When LLB is logic one, the sliced receive data replaces the transmit
data at the high-speed transmitter.
Note that the loopback can also be activated remotely through inband bit
oriented codes.
TXDIS:
The Transmit Disable bit disables the high-speed outputs. If TXDIS is logic
one, the associated TXDn+/- outputs do not drive valid logic levels, but
instead float. TXDIS does not affect the differential output impedance; it is
always within the range specified in the D.C. Characteristics section.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
109
PMC [ PMC-SIERRA, INC ]
