PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 186

• 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
Register 0045H: RRMP Receive SSM
SSMV[7:0]
FLTRSSM
BYTESSM
Bit
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
The synchronization status message value (SSMV[7:0]) bits represent the extracted S1 nibble
(or byte). When filtering is enabled via the FLTRSSM register bit, SSMV is updated when
the same S1 nibble (or byte) is received for eight consecutive frames. When filtering is
disabled, SSMV is updated every frame.
The filter synchronization status message (FLTRSSM) bit enables the filtering of the SSM
nibble (or byte). When FLTRSSM is set to logic 1, the SSM value is updated when the same
SSM is received for eight consecutive frames. When FLTRSSM is set to logic 0, the SSM
value is updated every frame.
The byte synchronization status message (BYTESSM) bit extends the SSM from a nibble to a
byte. When BYTESSM is set to logic 1, the SSM is a byte and bits 1 to 8 of the S1 byte are
considered. When BYTESSM is set to logic 0, the SSM is a nibble and only bits 5 to 8 of the
S1 byte are considered.
Type
R/W
R/W
R
R
R
R
R
R
R
R
BYTESSM
FLTRSSM
Unused
Unused
Unused
Unused
SSMV[7]
SSMV[6]
SSMV[5]
SSMV[4]
SSMV[3]
SSMV[2]
SSMV[1]
SSMV[0]
Function
Unused
Unused
S/UNI-2488 Telecom Standard Product Datasheet
Default
0
0
X
X
X
X
X
X
X
X
Released
186