
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
123
14.26 JTAG Test Access Port Interface
The JTAG Test Access Port block provides JTAG support for boundary scan. The
standard JTAG EXTEST, SAMPLE, BYPASS, IDCODE and STCTEST
instructions are supported. The SPECTRA-9953 identification code is 053170CDH
hexadecimal.
14.27 Microprocessor Interface
The Microprocessor Interface Block provides the logic required to interface the generic
microprocessor bus with the normal mode and test mode registers within the SPECTRA-9953.
The normal mode registers are used during normal operation to configure and monitor the
SPECTRA-9953. The test mode registers are used to enhance the testability of the SPECTRA-
9953. The register set is accessed as shown in Table 15. In the following section, every register
is documented and identified using the register numbers. The corresponding memory map
address is identified by the address column of the table. Addresses that are not shown are not
used and must be treated as reserved.
Note: The SPECTRA-9953 device has three type of normal registers: top-level registers, STM-
16 registers, and STM-4 registers on both the receive and transmit sides of the device. Bit 14 of
the MPIF address bus is used to select between a test and a normal register. Bit 13 is used to
select between the receive and transmit sides of the device. Bits[12:11] are used to select an
STM-16 slice (“00H to select STM-16 channel#1, “01H” to select #2, “10H” for #3 and “11H”
for #4). Bits[10:9] are used to select an STM4 slice (“00H to select STM-4 slice#1, “01H” to
select #2, “10H” for #3 and “11H” for #4), and finally bits[8:0] provides the address of the
register to be accessed.
Table 15 SPECTRA-9953 Register Mapping Table
TST
A[14]
RX/TX
A[13]
STM-16
Slice #
A[12:11
]
STM-4
Slice #
A[10:9]
Address
(HEX)
A[8:0]
Register Description
TOP LEVEL REGISTERS
X
0
1
000-03F
Top-level configuration/status
0
0
000
SP9953 Master Configuration
0
0
001
SP9953 Receive Configuration #1
0
0
002
SP9953 Receive Configuration #2
0
0
003
SP9953 Receive Configuration #3
0
0
004
SP9953 Transmit Configuration #1
0
0
005
SP9953 Transmit Configuration #2
0
0
006
SP9953 Transmit Configuration #3
0
0
008-017
SP9953 System Side Line Loopback
(1 through 16)
0
0
018
RESERVED