
SBSLITE Telecom Standard Product Data Sheet
Preliminary
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010883, Issue 2
130
Register 065H: OSTA H1-H2 Pointer Selection
Bit
Type
Function
Default
Bit 15
R/W
OH1H2EN
0
Bit 14
Unused
0
Bit 13
Unused
0
Bit 12
Unused
0
Bit 11
R/W
STS1_PTR_SEL[12]
0
Bit 10
R/W
STS1_PTR_SEL[11]
0
Bit 9
R/W
STS1_PTR_SEL[10]
0
Bit 8
R/W
STS1_PTR_SEL[9]
0
Bit 7
R/W
STS1_PTR_SEL[8]
0
Bit 6
R/W
STS1_PTR_SEL[7]
0
Bit 5
R/W
STS1_PTR_SEL[6]
0
Bit 4
R/W
STS1_PTR_SEL[5]
0
Bit 3
R/W
STS1_PTR_SEL[4]
0
Bit 2
R/W
STS1_PTR_SEL[3]
0
Bit 1
R/W
STS1_PTR_SEL[2]
0
Bit 0
R/W
STS1_PTR_SEL[1]
0
OH1H2EN
The OH1H2EN bit enables the insertion of the H1 and H2 bytes in the transport overhead on
the Outgoing TelecomBus. When OH1H2EN is a logic one, the values in the internal
registers is inserted into the H1 and H2 bytes of the Outgoing TelecomBus according to the
STS1_PTR_SEL[12:1] bits. When OH1H2EN is a logic zero, the values from the internal
registers is not inserted into the H1 and H2 bytes. This bit has no effect when in SBI mode
(TELECOM_BUS = ‘b0 in the Master Configuration Register).
STS1_PTR_SEL[12:1]
The STS1_PTR_SEL[12:1] bits select which of the two H1-H2 Pointer registers is used for
each of the 12 STS-1’s output on the Outgoing TelecomBus when the OH1H2EN bit is set.
When STS1_PTR_SEL[x] is a logic zero, the OSTA Transmit H1-H2 Pointer Value register is
used for the associated STS-1 on the Outgoing bus. When STS1_PTR_SEL[x] is a logic one,
the OSTA Transmit Alternate H1-H2 Pointer Value register is used for the associated STS-1
on the Outgoing bus. These bits have no effect when OH1H2EN is low or when in SBI mode
(TELECOM_BUS = ‘b0 in the Master Configuration Register).