TC9205M-DS-R02 datasheet(34/51 Pages) ETC1

34 / 51 page

TC9205M

Preliminary Data Sheet

10.3.5

Backpressure Time Value Register

Confidential.

34/51

July 30, 2003

TC9205M-DS-R03

- Address: 31h, 30h

7 6 5 4 3 2 1 0

BPTimeValue

15 14 13 12 11 10 9 8

31h

30h

Bit(s)

Field

Description

15 – 0

BPTimeValue

Backpressure time value

BPTimeValue

A 16 bit value used to compute internal time value for backpressure operation.

Default value is ‘0000100000000000’(2048).

10.3.6

Flow Control Port Base Address Register

- Address: 32h, 33h, 34h, 35h, 36h, 37h

47 46 45 44 43 42 41 40

FCBaseAddress

31 30 29 28 27 26 25 24

39 38 37 36 35 34 33 32

7 6 5 4 3 2 1 0

23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8

Bit(s)

Field

Description

47 – 0

FCBaseAddress

Source port base address for flow control packets

FCBaseAddress

Contains a 48 bit MAC address used to generate the individual port address used in

direct flow control addressing. The port addresses are obtained by incrementing

this base address and assigning the result to the TC9205M’s ports starting with port

0. The least significant 5 bits of this address will be ignored and replaced with ‘0’, so

these bits will encode the port number in the actual port address.

10.3.7

Reserved

- Address: 3Ch This register should be set to “0”.

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