
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
366
Figure 74
- Framer Mode J2 Transmit Input Stream With TGAPCLK
TGAPCLK[x]
TDATI[x]
TS988
TS11
TS988
TS987
TS11
TS988
TS987
TSN6
TSN8
TICLK[x]
TS11
TSN7
The Framer Mode J2 Transmit Input Stream diagrams (Figure 73 and Figure 74)
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 J2 transmit format. If the TXMFPI register bit is logic 0, then TFPI is valid
(as shown in Figure 73). The S/UNI-QJET will expect TFPI to pulse once every
J2 frame with alignment to the first frame alignment bit on TDATI. If the TXMFPI
register bit is logic 1, then TMFPI is valid. The S/UNI-QJET will expect TMFPI to
pulse once every J2 multi-frame with alignment to the first frame alignment bit on
TDATI. If the TXMFPO register bit is logic 0, then TFPO is valid. The
S/UNI-QJET will pulse TFPO once every 789 TICLK cycles, providing upstream
equipment with a reference frame pulse. If the TXMFPO register bit is logic 1,
then TMFPO is valid and the S/UNI-QJET will pulse TMFPO once every 3156
TICLK cycles, providing upstream equipment with a reference multi-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 register is set to logic 1, as in Figure 74. TGAPCLK remains high during the
overhead bit positions. TDATI is sampled on the falling edge of TGAPCLK.
Figure 75
- Framer Mode J2 Receive Output Stream
RDATO[x]
RFPO/RMFPO[x]
1
0
1
TS968
e1
ROVRHD[x]
TS11
m1
0
TS978
TS977
TS976
TS976
TS977
TS978
RSCLK[x]
TS973
TS972
TS971
Figure 76
- Framer Mode J2 Receive Output Stream with RGAPCLK
RGAPCLK[x]
RDATO[x]
TS968
TS11
TS968
TS967
TS966
TS906
TS907
TS908
TS968