XM014035B datasheet(75/101 Pages) XMOS

75 / 101 page

XU6--FB6 Datasheet

Link conguration and initialization

XLINK 0x80 .. 0x88

These registers contain conguration and debugging information specic to external

links. The link speed and width can be set, the link can be initialized, and the link sta-

tus can be monitored. The registers control links ...

Bits

Perm

Init

Description

Identier

Write to this bit with ’’ will enable the XLink, writing ’’ will disable it.

This bit controls the muxing of ports with overlapping xlinks.

XLINK_ENABLE

: operate in wire mode; : operate in wire mode

XLINK_WIDE

Reserved

Rx buffer over ow or illegal token encoding received.

XLINK_RX_ERROR

This end of the xlink has issued credit to allow the remote end to

transmit

RX_CREDIT

This end of the xlink has credit to allow it to transmit.

TX_CREDIT

Clear this end of the xlink’s credit and issue a HELLO token. XLINK_HELLO

Reset the receiver. The next symbol that is detected will be the rst

symbol in a token.

XLINK_RX_RESET

Reserved

Specify min. number of idle system clocks between two continuous

symbols witin a transmit token -.

XLINK_INTRA_TOKEN_DELAY

Specify min. number of idle system clocks between two continuous

transmit tokens -.

XLINK_INTER_TOKEN_DELAY

x8 .. x88:

Link

conguration

and

initialization

Static link conguration

XSTATIC 0xA0 .. 0xA7

These registers are used for static (ie, non-routed) links. When a link is made static, all

trafc is forwarded to the designated channel end and no routing is attempted. The

registers control links C, D, A, B, G, H, E, and F in that order.

Bits

Perm

Init

Description

Identier

Enable static forwarding.

XSTATIC_ENABLE

Reserved

The destination processor on this node that packets received in static

mode are forwarded to.

XSTATIC_DEST_PROC

Reserved

The destination channel end on this node that packets received in static

mode are forwarded to.

XSTATIC_DEST_CHAN_END

xA .. xA:

Static link

conguration

XM014035B Datasheet(PDF) 75 Page - Xmos Ltd.

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