RELEASED
PM7351 S/UNI-VORTEX
DATA SHEET
PMC-1980582
ISSUE 5
OCTAL SERIAL LINK MULTIPLEXER
To support current and future devices, the interface is configurable as either an
Any-PHY or SCI-PHY interface. Table 1 summarizes the distinctions between
the two protocols.
Table 1 SCI-PHY and Any-PHY Comparison
Attribute
Latency
SCI-PHY
Any-PHY
RDAT[15:0], RPRTY, RSOP and
RSX are driven or become high
impedance immediately upon
sampling RENB low or high,
respectively. RPA is driven
immediately upon sampling a
RADR[4:0] value that matches
VADR[4:0].
RDAT[15:0], RPRTY, RSOP and
RSX are driven or become high
impedance on the RCLK rising
edge following the one that
samples RENB low or high,
respectively. RPA is driven on the
RCLK rising edge following the one
that samples a RADR[4:0] value
that matches VADR[4:0].
RSX
Undefined. It is low when not high
impedance.
High coincident with the first word
of the cell data structure.
RSOP
High coincident with the first word
of the cell data structure.
High coincident with the second
word of the cell data structure.
Paused
transfers
Permitted by deasserting RENB
high, but the S/UNI-VORTEX’s
address must be presented on
RADR[4:0] the last cycle RENB is
high.
Permitted by deasserting RENB
high. The cell transfer resumes
unconditionally when RENB is
asserted low again.
Autonomous Not supported. A subsequent cell
The outputs become high
deselection
is output (provided one is available) impedance after the last word of a
if RENB is held low beyond the end cell is transferred until the S/UNI-
of a cell.
VORTEX is reselected.
The cell format is the same as the downstream interface (Fig. 3). No address
map manipulation is performed in the upstream direction; ADDR[13:0] field
encoding has a fixed relationship to the physical ports. ADDR[13:9] will always
equal the VADR[4:0] input pins’ state. ADDR[8:6] corresponds to the index of the
high speed serial link (RXD0+/- through RXD7+/-) over which the cell was
received. ADDR[5:0] presents the logical channel index that had been encoded
in the cell received on the high-speed serial link. An encoding of “111110” in
ADDR[5:0] indicates the cell is a control channel cell.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
33
PMC [ PMC-SIERRA, INC ]
