
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
35
7.2
System Loopback
The SPECTRA-9953 device supports the section layer diagnostic line side system loopback
(LSSLB). The TRMP output is fed-back to the RRMP input when LSSLB is enabled. The line
transmit interface is still valid when such a section layer diagnostic loopback is enabled.
However, the receive overhead ports (rld, rsld, rtoh, and b3e outputs) are not operational in this
loopback.
Also implemented on the SPECTRA-9953 device, is a system-side diagnostic loopback before
the aligners. The SHPI output is fed-back to the Drop bus SSI input.
Figure 5 System Loopback Modes
R
R
R
R
R
R
R
B
SBER
(4)
RTTP
(4)
PHASE_INIT[4:1]
PHASE_ERR[4:1]
TxLVRef
TXLV
(4)
RRMP
(4)
RRMP
(4)
RRMP
(4)
RRMP
(4)
TRMP
(4)
TRMP
(4)
TRMP
(4)
TRMP
(4)
TTTP
(4)
T
T
T
T
SYNC_ERR[4:1]
S
SIPO
(4)
SIPO
(4)
SIPO
(4)
SIPO
(4)
RXLV
(4)
RXLV
(4)
RXLV
(4)
RXLV
(4)
S
PISO
(4)
PISO
(4)
SIPO
(4)
PISO
(4)
TXLV
(4)
TXLV
(4)
TXLV
(4)
T
T
T
DD1[3:0]+/-
DD2[3:0]+/-
DD3[3:0]+/-
DD4[3:0]+/-
AD1[3:0]+/-
CSU
AD2[3:0]+/-
AD3[3:0]+/-
AD4[3:0]+/-
TXLV
(4)
TxLVRef
RXLV
(4)
RXLV
(4)
RXLV
(4)
RXLV
(4)
TXLV
(4)
TXLV
(4)
TXLV
(4)
DRU
(4)
DRU
(4)
DRU
(4)
DRU
(4)
R8TD
(4)
R8TD
(4)
R8TD
(4)
R8TD
(4)
PISO
(4)
T8TE
(4)
PISO
(4)
T8TE
(4)
PISO
(4)
PISO
(4)
T8TE
(4)
T8TE
(4)
DFP
AFP
SYSCLK
TRCPCK, TRCPFP
TRCPD[4:1]
SARC-48
(4)
RSALM[4:1]
RALM[4:1]
RRCPD[4:1]
RRCPCK, RRCPFP
D
C
A
A
W
R
I
R
M
JTAG
T
T
T
T
T
Microprocessor
Q
TXFPO
TXFPI
RXDATA[4:1][3:0]+/-
RXCLK[4:1]+/-
TXDATA[4:1][3:0]+/-
TXCLK[4:1]+/-
TXCLK_SRC[4:1]+/-
P
P
RTTP
(16)
RHPP
(4)
RHPP
(4)
RHPP
(4)
RHPP
(4)
SVCA
(4)
SVCA
(4)
SVCA
(4)
SVCA
(4)
THPP
(4)
THPP
(4)
THPP
(4)
THPP
(4)
TTTP
(16)
SVCA
(4)
SVCA
(4)
SVCA
(4)
SVCA
(4)
TPAISFP
TPAIS[4:1]
ACMP
S
S
I
SHPI
(4)
SHPI
(4)
SHPI
(4)
SHPI
(4)
S
S
I
DCMP
DFPO
l
s