ACS8525 Semtech Corporation, ACS8525 Datasheet - Page 73

• Manufacturer Part Number: ACS8525
• Description: Line Card Protection Switch For Sonet/sdh Systems
• Manufacturer: Semtech Corporation

Address (hex):
Address (hex):
Revision 3.00/October 2003 © Semtech Corp.
ADVANCED COMMUNICATIONS
Register Name
Register Name
Bit No.
Bit No.
Bit 7
[7:2]
[1:0]
Bit 7
[7:0]
57
58
cnfg_decay_rate_1
Description
Not used.
decay_rate_1_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.
cnfg_upper_threshold_2
Description
upper_threshold_2_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. 5B (cnfg_decay_rate_2), in
which this does not occur, the accumulator is
decremented by 1.
When the accumulator count reaches the value
programmed as the upper_threshold_2_value, the
Leaky Bucket raises an input inactivity alarm.
Bit 6
Bit 6
upper_threshold_2_value (Activity alarm, Config. 2, Leaky Bucket - set threshold)
Bit 5
Bit 5
Description
Description
Bit 4
Bit 4
FINAL
Page 73
(R/W) Register to program the
“decay” or “leak” rate for Leaky
Bucket Configuration 1.
(R/W) Register to program the
activity alarm setting limit for
Leaky Bucket Configuration 2.
Bit Value
Bit Value
Bit 3
Bit 3
00
01
10
11
-
-
Value Description
-
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.
Value Description
Value at which the Leaky Bucket will raise an
inactivity alarm.
Bit 2
Bit 2
Default Value
Default Value
ACS8525 LC/P
alarm, Config. 1, Leaky Bucket -
decay_rate_1_value (Activity
Bit 1
Bit 1
leak rate)
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0000 0001
0000 0110
Bit 0
Bit 0