ACS8520T Semtech, ACS8520T Datasheet - Page 104

• Manufacturer Part Number: ACS8520T
• Description: Synchronous Equipment Timing Source (SETS) for Stratum 3/4E/4 and SMC Systems
• Manufacturer: Semtech

Address (hex):
Address (hex):
Revision 3.02/October 2005 © Semtech Corp.
ADVANCED COMMUNICATIONS
Register Name
Register Name
Bit No.
Bit No.
Bit 7
[7:0]
Bit 7
[7:2]
[1:0]
56
57
cnfg_bucket_size_1
Description
bucket_size_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 Reg. 57 (cnfg_decay_rate_1), 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.
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.
Bit 6
Bit 6
Bit 5
Bit 5
Description
Description
Bit 4
Bit 4
bucket_size_1_value
FINAL
Page 104
(R/W) Register to program the
maximum size limit for Leaky
Bucket Configuration 1.
(R/W) Register to program the
“decay” or “leak” rate for Leaky
Bucket Configuration 1.
Bit Value
Bit Value
Bit 3
Bit 3
00
01
10
11
-
-
Value Description
Value at which the Leaky Bucket will stop
incrementing, even with further inactive periods.
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 1024 ms.
Bit 2
Bit 2
Default Value
Default Value
ACS8520 SETS
Bit 1
Bit 1
decay_rate_1_value
DATASHEET
www.semtech.com
0000 1000
0000 0001
Bit 0
Bit 0