PM7350 datasheet(61/241 Pages) PMC

61 / 241 page

RELEASED

PM7350 S/UNI-DUPLEX

DATA SHEET

PMC-1980581

ISSUE 5

DUAL SERIAL LINK PHY MULTIPLEXER

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

Table 4 Eight Bit SCI-PHY/Utopia Bus Master, Output Configuration

Byte

bytes

INADD

UDF

PRE

LEN

Notes

Short cell, no PHY ID is generated

Default setting. Utopia compatible,

standard 53 byte cell, no PHY ID

1 user byte, H1-H4, no PHY ID

1 user byte, H1-H5, no PHY ID

2 user bytes, H1-H4, no PHY ID

2 user bytes, H1-H5, no PHY ID

Table 5 Sixteen Bit SCI-PHY/Utopia Bus Master, Output Configuration

Word

bytes

INADD

UDF

PRE

LEN

Notes

Short cell, no PHY ID

Default, Utopia compatible, no PHY ID

2 user bytes, H1-H4, no PHY ID

2 user bytes, H1-H4, H5/UDF, no PHY ID

9.1.2 SCI-PHY or Utopia Bus Slave

The SCI-PHY/Utopia bus slave format is enabled when the IANYPHY,

OANYPHY, IMASTER, and OMASTER inputs are all tied low.

In the ingress direction (cells are transferred from the parallel bus input port to

the LVDS links), the port presents itself as 32 PHY entities but is fully Utopia

Level 2 compatible when 31 or fewer PHYs are active and IAVALID is tied high.

Cells read from the bus are queued in a dedicated FIFO for each virtual PHY

(hereafter referred to as a logical channel). The ability of the FIFOs to accept

additional cells is discovered through polling using the IADDR[4:0] and IAVALID

inputs. Upon IAVALID being sampled high the ICA output is asserted if the cell

FIFO for the logical channel addressed by IADDR[4:0] has at least one empty

cell buffer. If the FIFO is full, ICA is deasserted. If a cell transfer is in progress

that will fill a logical channel FIFO, ICA will also be deasserted. If IAVALID is

sampled low (in SCI-PHY mode) ICA becomes high impedance.

When operating as a SCI-PHY/Utopia interface, a cell transfer is effected by the

assertion low of IENB. The logical channel FIFO to which the cell is written is

selected by the IADDR[4:0] value sampled when IENB was last sampled high.

PM7350 Datasheet(PDF) 61 Page - PMC-Sierra, Inc

PM7350 Datasheet(HTML) 61 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