PM7375-SC datasheet(88/430 Pages) PMC

88 / 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

IOC

The Interrupt On Complete (IOC) bit is used by the PCI

Host to instruct the LASAR-155 to interrupt it when it has

completed transmission of the current TD's buffer.

When IOC is logic one, the LASAR-155 will interrupt the

PCI Host using the PCIINTB output if it is enabled using

a register bit. In addition, it will flush the LASAR-155's

internal six deep TD buffer and place all the TDs onto

the Tx Descriptor Reference Free Queue.

If IOC is logic zero, the LASAR-155 will not interrupt the

PCI Host. The TD will be place in the internal six deep

TD buffer (if enabled).

TVC[6:0]

The Transmit Virtual Connection Code (TVC[6:0]) bits

are used by the PCI Host to indicate which VC a TD

should be associated with. The TVC bits are

constructed from N (where N=0,1,2) bits of the Virtual

Path Identifier (VPI) and M (where M=7,6,5) bits of the

Virtual Channel Identifier. Selection of M and N are

made using a COPS register. In addition, for all TDs of

the same link list structure the PCI Host adds to the Tx

Descriptor Reference Ready Queue, the TVC fields

must be the same.

Packet Length [15:0]

The Packet Length bits are used by the PCI Host to

indicate the total number of bytes in the packet to be

transmitted. For multiple TD packets, the Packet Length

fields of each TD must be the same. In all but the last

TD, all bytes of each TD's buffer are expected to contain

packet data.

The Packet Length[15:0] field can be modified by the

LASAR-155. The original value set by the PCI Host may

not be present when the TDR is returned to the PCI

Host via the TDRF Queue.

Transmit Buffer

Size [15:0]

The Transmit Buffer Size bits are used to indicate the

size in octets of the current TD's data buffer. This field

must be configured by the PCI Host.

The minimum size supported is 4 bytes.

PM7375-SC Datasheet(PDF) 88 Page - PMC-Sierra, Inc

PM7375-SC Datasheet(HTML) 88 Page - PMC-Sierra, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL