RELEASED
PM7351 S/UNI-VORTEX
DATA SHEET
PMC-1980582
ISSUE 5
OCTAL SERIAL LINK MULTIPLEXER
Register 0x008: Downstream Cell Interface Configuration
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R/W
H5UDF
Unused
Unused
1
X
X
0
0
0
X
0
R/W
R/W
R/W
INADDUDF
Reserved
PREPEND
Unused
R/W
PTYP
PTYP:
The Parity Type (PTYP) bit selects even or odd parity for input TPRTY. When
set to logic 1, TPRTY is the even parity bit for TDAT[15:0]. When set to logic
0, TPRTY is the odd parity bit for TDAT[15:0].
PREPEND:
The PREPEND bit determines whether a word is prepended to each cell.
When PREPEND is logic 1, the optional “Word 1” illustrated in Fig. 3 (p. 34)
is included in the data structure expected on TDAT[15:0].
Reserved:
The Reserved bit should be set be logic 0 for correct operation.
INADDUDF:
The INADDUDF (inband addressing in UDF byte) bit re-locates the inband
address. When this bit is set, the logical channel address for in band
selection is located in the twelve lower bits of the H5 and UDF bytes and
there is no extended address word in front of the prepend word. The H5UDF
bit must also be set (its default value) if this bit is set or the interface will not
function correctly.
Although the ability to carry the inband address in the H5/UDF fields is
provided for compatibility with devices that cannot generate a prepend, there
are a couple of constraints that must be respected in this configuration:
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
67
PMC [ PMC-SIERRA, INC ]
