ACS8526P datasheet(45/74 Pages) SEMTECH

45 / 74 page

ADVANCED COMMUNICATIONS

FINAL

DATASHEET

Revision 4.01/June 2006 © Semtech Corp.

Page 45

www.semtech.com

ACS8526 LC/P LITE

Address (hex):

Description

(R/W) Register to program the

maximum size limit for the Leaky

Bucket Configuration.

Default Value

0000 1000

Bit 7Bit 6

Bit 5Bit 4

Bit 3

Bit 2Bit 1Bit 0

bucket_size_value (Activity alarm, Leaky Bucket - size)

Bit No.

Description

Bit Value

Value Description

[7:0]

bucket_size_value

The Leaky Bucket operates on a 128 ms cycle. If,

during a cycle, it detects that an input has either

failed or has been erratic, then for each cycle in

which this occurs, the accumulator is incremented

by 1, and for each period of 1, 2, 4, or 8 cycles, as

programmed in Reg. 53 (cnfg_decay_rate), in which

this does not occur, the accumulator is

decremented by 1.

The number in the Bucket cannot exceed the value

programmed into this register.

Value at which the Leaky Bucket will stop

incrementing, even with further inactive periods.

Address (hex):

Description

(R/W) Register to program the

“decay” or “leak” rate for the

Leaky Bucket Configuration.

Default Value

0000 0001

Bit 7Bit 6

Bit 5Bit 4

Bit 3

Bit 2Bit 1Bit 0

decay_rate_value (Activity alarm,

Leaky Bucket - leak rate)

Bit No.

Description

Bit Value

Value Description

[7:2]

Not used.

[1:0]

decay_rate_value

The Leaky Bucket operates on a 128 ms cycle. If,

during a cycle, it detects that an input has either

failed or has been erratic, then for each cycle in

which this occurs, the accumulator is incremented

by 1, and for each period of 1, 2, 4, or 8 cycles, as

programmed in this register, in which this does not

occur, the accumulator is decremented by 1.

The Leaky Bucket can be programmed to “leak” or

“decay” at the same rate as the “fill” cycle, or

effectively at one half, one quarter, or one eighth of

the fill rate.

Bucket decay rate of 1 every 128 ms.

Bucket decay rate of 1 every 256 ms.

Bucket decay rate of 1 every 512 ms.

Bucket decay rate of 1 every 1,024 ms.

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