Anonymous
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Nov 13, 2009
05:43 AM
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Nov 13, 2009
05:43 AM
The operating current ICC mentioned in the datasheet includes only the core power, it does not include the IO power. You can compute the IO power as shown below.
Assuming capacitive load only, IO power can be estimated to be ((α)* f *N * CL* V * V)
where
α is called the activity factor ; if on an average half the IO's switch per clock cycle, then α is 0.5.
f is the switching frequency or clock frequency
N is the number of IO's
CL is the capacitive load;
V is the Voltage swing of the IO.
For example: IO power for (CYD18S36V18) = (10MHz * 36 * 20pF * 3.3^2)/2 = 39.2mW.
More information can be obtained from this Application Note: http://www.cypress.com/?rID=12896
Assuming capacitive load only, IO power can be estimated to be ((α)* f *N * CL* V * V)
where
α is called the activity factor ; if on an average half the IO's switch per clock cycle, then α is 0.5.
f is the switching frequency or clock frequency
N is the number of IO's
CL is the capacitive load;
V is the Voltage swing of the IO.
For example: IO power for (CYD18S36V18) = (10MHz * 36 * 20pF * 3.3^2)/2 = 39.2mW.
More information can be obtained from this Application Note: http://www.cypress.com/?rID=12896
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3 Replies
Anonymous
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Jan 25, 2010
11:13 AM
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Jan 25, 2010
11:13 AM
They have created web tools for power calculations of Async and Sync SRAMs.
Jan 25, 2010
11:44 AM
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Jan 25, 2010
11:44 AM
Hello Abhu,
Can you please provide the link to the web tool?
Can you please provide the link to the web tool?
Anonymous
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Jan 25, 2010
12:24 PM
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Jan 25, 2010
12:24 PM
Pavan seems to have already added files in zip format for Sync SRAMs as well at following link..
http://www.cypress.com/forums/...did=7466&enterthread=y
http://www.cypress.com/forums/...did=7466&enterthread=y