PM5364 pmc-sierra, PM5364 Datasheet - Page 184

• Manufacturer Part Number: PM5364
• Description: Tupp 2488 Assp Telecom Standard
• Manufacturer: pmc-sierra

Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2011334, Issue 7
•
•
The following sections describe in detail each mode of operation, the restrictions with respect to
simultaneous support of other modes and an overview of how to configure the payload
processor to support each mode.
Either the Tributary Path or the Bypass Path supports each mode. Both paths will process the
incoming STS-12/STM-4 frame regardless of the mode of operation. However, only the path
that supports that mode will produce a valid output. The Tributary-Bypass Mux at the output
side of the Payload Processor is used to select the valid data from either Tributary or Bypass
paths at an STS-1/STM-0, STS-3/STM-1 or STS-12/STM-4 granularity. Which of the Tributary
or Bypass paths is chosen for a given SONET/SDH high order path is configured using the
TBM_STS1_SELECT[12:1] bits of the Tributary-Bypass Mux Configuration and Status
Registers. The Tributary-Bypass Mux must be configured for all modes of operation.
Modes that can be supported simultaneously with other modes at an STS-1/STM-0 or STS-
3/STM-1 granularity will be referred to as Simultaneous modes. Modes that can only be
supported individually at an STS-12/STM-1 or STS-48/STM-16 granularity will be referred to
as Individual modes.
The VTPA glue logic unequipped enable bit (VIG_UNEQ_EN) of the VIG configuration
register configures the device to optionally set the EIDLE_HTPOHEN output pin when
unequipped is detected by the RTOP. Configure the VIG_UNEQ_EN to achieve the desired
behavior. Note configuring the VIG_UNEQ_EN bit is only required when the Payload
Processor Loopback mode is used.
The VTPA operates in a LOCKED mode where the high order pointer in the outgoing data
stream is fixed. Specify the desired high order pointer and SS value in the VTPA outgoing data
stream by programming the Locked Mode High Order Pointer and Locked Mode Concatenation
Indicator registers, respectively. The locked mode high order pointer register defaults to the
recommended pointer value of 522.
AU3 to AU4 Tributary Mode 2
Transparent Bypass Mode
TUPP™ 2488 ASSP Telecom Standard Product Data Sheet
Released
184