
PM7346 S/UNI-QJET
DATASHEET
PMC-960835
ISSUE 6
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE
364
S/UNI-QJET Configuration 1 register are set to logic 1 and logic 0 respectively.
Figure 67 shows the data streams when the S/UNI-QJET is configured for the E3
G.751 receive format. RFPO or RMFPO pulses high for one RSCLK cycle and is
aligned to the first bit of the framing alignment signal in the G.751 E3 output data
stream on RDATO. ROVRHD will be high for every overhead bit position on the
RDATO data stream. If the PYLD&JUST register bit in the E3 FRMR
Maintenance Options register is set to logic 0, the C
jk
and P
k
bits in the RDATO
stream will be marked as overhead bits. If the PYLD&JUST register bit is set to
logic 1, the C
jk
and P
k
bits in the RDATO stream will be marked as payload. The
RGAPCLK output is available in place of RSCLK when the RXGAPEN bit in the
S/UNI-QJET Configuration 2 register is set to logic 1. RGAPCLK remains high
during the overhead bit positions as shown in Figure 68.
Figure 69
- Framer Mode G.832 E3 Transmit Input Stream
TDATI[x]
Oct 5308
TFPI/TMFPI[x]
Oct N3
Oct N2
Oct N1
FA11
FA14
FA13
FA12
FA15
FA16
FA17
FA18
Oct 5303
Oct 5301
Oct 5302
Oct 5304
Oct 5305
Oct 5306
Oct 5307
TFPO/TMFPO[x]
TICLK[x]
Figure 70
- Framer Mode G.832 E3 Transmit Input Stream With TGAPCLK
TGAPCLK[x]
TDATI[x]
Oct 5308
Oct N3
Oct N2
Oct N1
Oct 5303
Oct 5301
Oct 5302
Oct 5304
Oct 5305
Oct 5306
Oct 5307
TICLK[x]
The Framer Mode G.832 E3 Transmit Input Stream diagrams (Figure 69 and
Figure 70) show the expected format of the inputs TDATI, TFPI/TMFPI, and
TICLK and the output TFPO/TMFPO (and TGAPCLK) when the FRMRONLY bit
in the S/UNI-QJET Configuration 1 register is set, and the S/UNI-QJET is
configured for the E3 G.832 transmit format. TFPI or TMFPI pulses high for one
TICLK cycle and is aligned to the first bit of the FA1 byte in the G.832 E3 input
data stream on TDATI. TFPO or TMFPO will pulse high for one out of every 4296
TICLK cycles, providing upstream equipment with a reference frame pulse. The
alignment of TFPO or TMFPO is arbitrary. There is no set relationship between
TFPO/TMFPO and TFPI/TMFPI. The TGAPCLK output is available in place of
TFPO/TMFPO when the TXGAPEN bit in the S/UNI-QJET Configuration 2