S/UNI®-JET Data Sheet
Released
Pin Name
Type
Pin
No.
Function
REF8KO
Output
U12
The Reference 8kHz Output (REF8KO) is an 8kHz
reference derived from the receive clock (RCLK). A free-
running divide-down counter is used to generate
REF8KO so it will not “glitch” on reframe actions.
REF8KO will pulse high for approximately one RCLK
cycle every 125 µs. REF8KO should be treated as a
“glitch-free” asynchronous signal.
The Receive PLCP Overhead Frame Position (RPOHFP)
locates the individual PLCP path overhead bits in the
receive overhead data stream, RPOH. RPOHFP is logic
one while bit 1 (the most significant bit) of the path user
channel octet (F1) is present in the RPOH stream.
RPOHFP
RPOHFP is updated on the falling edge of RPOHCLK.
RPOHFP is available when the PLCPEN register bit is
logic one in the SPLR Configuration Register.
The Framer Receive Frame Pulse/Multi-frame Pulse
(RFPO/RMFPO) is valid when the S/UNI-JET is
configured to be in framer only mode. The 8KREFO bit
must be set to logic zero in the S/UNI-JET Configuration
Register.
RFPO
RMFPO
RFPO is aligned to RDATO and indicates the position of
the first bit in each DS3 M-subframe, the first bit in each
G.751 E3 or G.832 E3 frame, or the first framing bit in
each J2 frame
RMFPO is aligned to RDATO and indicates the position
of the first bit in each DS3 M-frame, the first bit in each
G.751 or G.832 E3 multiframe, or the first framing bit in
each J2 multiframe.
RFPO/RMFPO is updated on either the falling or rising
edge of RSCLK depending on the setting of the RSCLKR
bit in the S/UNI-JET Receive Configuration Register.
RPOH
Output
V13
The Receive PLCP Overhead Data (RPOH) contains the
PLCP path overhead octets (Zn, F1, B1, G1, M1, M2,
and C1) extracted from the received PLCP frame when
the PLCP layer is in-frame. When the PLCP layer is in
the LOF state, RPOH is forced to all ones. The octet data
on RPOH is shifted out in order from the most significant
bit (bit 1) to the least significant bit (bit 8).
RPOH is updated on the falling edge of RPOHCLK.
The Framer Receive Overhead Indication (ROVRHD) is
valid when the S/UNI-JET is configured as a DS3, E3, or
J2 framer for non-ATM applications by setting the
FRMRONLY bit in the S/UNI-JET Configuration 1
Register. ROVRHD will be high whenever the data on
RDATO corresponds to an overhead bit position.
ROVRHD
ROVRHD is updated on the either the falling or rising
edge of RSCLK depending on the setting of the RSCLKR
bit in the S/UNI-JET Receive Configuration Register.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990267, Issue 3
42
PMC [ PMC-SIERRA, INC ]
