RELEASED
PM7351 S/UNI-VORTEX
DATA SHEET
PMC-1980582
ISSUE 5
OCTAL SERIAL LINK MULTIPLEXER
Fig. 3 SCI-PHY/Any-PHY Cell
Bit 15
Bit 8 Bit 7
Bit 0
W ord 0
Reserved
ADDR[13:0]
User Prepend
(optional)
W ord 1
(optional)
H1
H3
H2
H4
W ord 2
W ord 3
W ord 4
1
1
UDF
H5
(optional)
PAYLOAD1
PAYLOAD3
PAYLOAD2
PAYLOAD4
W ord 5
W ord 6
W ord 28
PAYLOAD47
PAYLOAD48
Note 1: Optionally, the H5/UDF fields can be overwritten by ADDR[13:0].
Format
9.1.2 Upstream
In the upstream direction, each S/UNI-VORTEX appears as a single SCI-PHY or
Any-PHY slave. The traffic from each high-speed serial link (RXD0+/- through
RXD7+/) is queued independently to support per logical channel flow control
without head of line blocking. Weighted round robin servicing determines the
order of cells presented on RDAT[15:0]. Weights are strictly linear. For
example, compared to a link with a weight of one, a LVDS link with a weight of
four will on average have four times the number of opportunities to place a cell
from its receive buffer onto the upstream bus. Each high speed serial link can be
assigned a weight between 1 and 4. When the state of the RADR[4:0] inputs
equals the state of the VADR[4:0] pins, the RPA output indicates whether there is
at least one cell available for transfer from any link.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
32
PMC [ PMC-SIERRA, INC ]
