
Multi-Service Access Device For Channelized Interfaces
Telecom Standard Product Data Sheet
Production
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990823, Issue 4
574
10. Write 0090H to the STSI Indirect Data register at STSI_BASE + 01H to set TSIN[3:0] to 9
and DINSEL[1:0] to 0. This selects the ID[1][7:0] and line-side timeslot S1,3 as the input bus
and timeslot respectively.
11. Write 00B1H to the STSI Indirect Address register at STSI_BASE + 00H to set TSOUT[3:0]
to BH and DOUTSEL[1:0] to 1. This selects the position S7,3 on the output stream and
system-side timeslot in the page 0 mapping of the IWTI.
12. Go back to step 1 if you want to configure more timeslot mappings.
14.9.5 Active and Standby Pages in the STSI Blocks
The STSI blocks contain 2 pages of configurations: an active page, and an inactive page.
Selection of the page in use in the IWTI and IPTI is done by the ICMP input signal. Selection of
the page in use in the OWTI and OPTI is done by the OCMP input signal.
The existence of an active page and an inactive page allows the user to set-up an alternate
timeslot mapping on multiple devices or multiple STSI blocks before performing a global switch
to the new mapping. The swapping of the page in use is done at transport frame boundaries. The
ICMP and OCMP are sampled at the J0 locations defined by RJ0FP and OJ0REF are logic 1
respectively.
14.10 Using RWSEL and SER_PRT_SEL
The RWSEL and SER_PRT_SEL signals are used to select how the working and protection
incoming serial TelecomBus signals (RPWRK[4:1]/RNWRK[4:1] and
RPPROT[4:1]/RNPROT[4:1]) are inserted into the data stream going to the S/UNI-MACH48
core. These functions are only valid when the serial TelecomBus interface is selected (SER_EN
input signal is logic 1).
The RWSEL input pin is used to perform a global switch between the working and protection
data streams. It is only active when the RWSEL_EN register bit in the S/UNI-MACH48
Configuration and Diagnostic register is set to logic 1. When RWSEL is logic 1, the working data
stream is selected to be routed to the core of the S/UNI-MACH48 device. The protection data
streams will only go as far as their corresponding PRGM blocks so that PRBS pattern detection
can be used to verify the link integrity. When RWSEL is logic 0, the protection data streams will
be routed to the core of the S/UNI-MACH48 device. The working data streams will only go as
far as their corresponding PRGM blocks so that the link integrity can be verified.
The RWSEL is sampled and the switch between the working and protection links occurs at
transport frame boundaries as shown in Section 15.5.
The SER_PRT_SEL register bits in the IWTI Indirect Data Register is used when RWSEL_EN is
set to logic 0 and when not working in STS-48c mode.