PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 292

• Manufacturer Part Number: PM5381-BI
• Description: ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
PTBJ1
ENH4MASK
ENG1REC
B3MASK
H4MASK
UNEQ
The PTBJ1 or Path Trace Buffer J1 byte register bit is used to determine the origin of the path
trace byte to be inserted. When PTBJ1 is high, the J1 byte is sourced from the TTTP PATH
block; otherwise, the J1 byte is sourced either from the TPOH input or not inserted at all as it
is controlled using the SRCJ1 bit.
These bits are only valid for THPP STS-1/STM0 #1.
When ENH4MASK is logic high, the H4[7:0] byte in THPP Transmit H4 Mask and G1
register is used as an error mask on the H4 byte. When ENH4MASK is logic low, the
H4[7:0] byte in THPP Transmit H4 Mask and G1 register is inserted as the H4 byte.
These bits are only valid for THPP STS-1/STM0 #1.
The valid high ENG1REC register bit enables the insertion of the PRDI[2:0] and PREI[3:0]
of the G1 byte from the SARC block. When ENG1REC is set to logic low, the G1 byte
source is other than the SARC block.
When B3MASK is logic high, the byte received via the TPOH (valid only if TPOHEN is
logic high) bit serial stream is to be used as a mask for an internally generated B3. When
B3MASK is logic low, the byte received on TPOH (valid only if TPOHEN is logic high) will
be inserted in the B3 byte if the path overhead source priority is TPOH.
When H4MASK is logic high, the byte received via the TPOH (valid only if TPOHEN is
logic high) bit serial stream is to be used as a mask for the H4 byte. When H4MASK is logic
low, the byte received on TPOH (valid only if TPOHEN is logic high) will be inserted in the
H4 byte only if the path overhead source priority is TPOH.
The unequipped bit (UNEQ) controls the insertion of an all-one or an all-zero pattern in the
payload. The path overhead and fixed stuff bytes are excluded from insertion.
S/UNI-2488 Telecom Standard Product Datasheet
Released
292