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Altera_Forum
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16 years ago

PLL Reconfig Icp, R, C Values

Hi, I am reconfiguring AltPLL (Startix II) to support a range of frequencies based on varying input clock frequency(20 MHz - 180MHz). I could not find in any of the documents the corresponding ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

An update on this,

Got the PLL reconfig working with the values taken from megawizard. If anyone is looking for the same, just writing it down..

for Stratix II Enhanced PLL Reconfig Values (selected bandwidth auto)

----------------------------------

Freq Icp R C M

(MHz) (uA) (kOhm) (pF)

----------------------------------

10 52 2.5 5 68

20 77 1.5 5 32

30 131 1 16 22

40 131 1 16 16

50 110 1 5 12

60 114 1 5 10

70 131 1 5 10

80 114 1 5 8

90 131 1 5 8

100 114 1 5 6

110 114 1 5 6

120 114 1 5 6

130 96 1 5 5

140 72 1 5 4

150 72 1 5 4

160 72 1 5 4

170 72 1 5 4

180 72 1 5 4