PM7375-SC datasheet(99/430 Pages) PMC

99 / 430 page

PM7375 LASAR-155

DATA SHEET

PMC-931127

ISSUE 6

LOCAL ATM SAR & PHYSICAL LAYER

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

Receive Buffer

Size [15:0]

The Receive Buffer Size bits indicate the size in bytes of

the current RPD's data buffer. This field must be

configured by the PCI Host during initialization.

Note, Receive Buffer Sizes must be an integer multiple

of four. Non integer multiples are not supported. In

addition, the minimum buffer size supported is forty-

eight bytes.

Bytes in Buffer [15:0]

The Bytes in Buffer bits indicate the number of bytes

actually used in the current RPD's packet buffer to store

packet data.

Data Buffer Start

Address[31:0]

The Data Buffer Start Address bits are used as a pointer

to the packet buffer of the current RPD into PCI Host

memory.

Note, Receive Buffers must be DWORD aligned. For

example, Data Buffer Start Address[1:0] is expected to

be set to 00 binary.

CPAAL5_PDU

UU [7:0]

The CPAAL5_PDU UU byte is the received User to User

byte of the CPCS AAL Type 5 Protocol Data Unit

associated with the current packet.

Note: for multiple RPD packets, only the first RPD's

CPAAL5_PDU UU field is valid. All other RPD

CPAAL5_PDU UU fields of the linked list are invalid and

should be ignored.

CPAAL5_PDU

CPI [7:0]

The CPAAL5_PDU CPI byte is the received Common

Part Indicator byte of the CPCS AAL Type 5 Protocol

Data Unit associated with the current packet.

Note: for multiple RPD packets, only the first RPD's

CPAAL5_PDU CPI field is valid. All other RPD

CPAAL5_PDU CPI fields of the linked list are invalid and

should be ignored.

PM7375-SC Datasheet(PDF) 99 Page - PMC-Sierra, Inc

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