[SI-LIST] Re: FPGA supply surrent
- From: "Mehrdad Salami" <msalami@xxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Tue, 3 Dec 2002 09:22:37 +1100
Hi,
Altera got a form based calculator to estimate the amount of current used by
APEX devices. The power consumption or current should be calculated for
VCCINT (1.8V) and VCCIO (ie 3.3V). I use EP20K200E and for VCCINT the
current is about 60mA. The frequency only affect the power used by VCCIO.
Cheers,
================================
Mehrdad Salami
Hardware Design Engineer,
Colour Vision Systems,
11 - Park Street, Bacchus Marsh,
VIC - Australia - 3340
Tel: +613-5367-3155
Fax : +613-5367-4480
Email: msalami@xxxxxxxxxx
----- Original Message -----
From: "Gopalakrishnan Sethuraj" <gopalakrishnan.sethuraj@xxxxxxxxx>
To: <hgm@xxxxxxxxxxx>; <peter.zhu@xxxxxxxxxx>; <si-list@xxxxxxxxxxxxx>
Sent: Monday, December 02, 2002 7:47 PM
Subject: [SI-LIST] FPGA supply surrent
> hai
>
> What is the supply current for ALTERA APEX series FPGA EP20K30E(1.8
voltage).The operating frequency of FPGA is 50Mhz
>
>
> Regards
> Gopalakrishnan.S
>
>
>
> -----Original Message-----
> From: Henrik G. Madsen [mailto:hgm@xxxxxxxxxxx]
> Sent: Monday, December 02, 2002 1:55 PM
> To: peter.zhu@xxxxxxxxxx; si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: How to select the pullup/pulldwon resistor
>
>
>
> Hey Peter
>
> For unused inputs the issue is simple and a matter of pure math and how =
> much noise margin you would like to have.
>
> If you look at a datasheet for a SN74LS74A, it specify the maximum input =
> leakage current in high and low state
>
> Iih =3D 40uA (Vi=3D2.7V)=20
> Iil =3D -0.8mA (Vi=3D0.4V)
>
> If the minimum supply voltage is 4.5V (5V +-10%) and you want a noise =
> margin of 400mV (standard for TTL), then the pullup and pulldown =
> resistor values are giving by.
>
> Rpullup <=3D (4.5V -(2.0V +0.4V))/ 40uA =3D 52.5 k ohm
>
> Rpulldown <=3D (0.8V-0.4V)/ 0.8mA =3D 0.5 k ohm
>
> The huge difference in requirement to the pullup and pulldown is caused =
> by the difference in leakage current and the distance from Vih/Vil to =
> the supply voltages.
>
> In modern CMOS electronic, the leakage current is lower and the Vih/Vil =
> are placed more symmitrically between power supplies.
>
> On top of that you often wnat to reduce the number of different types of =
> components as much as possible to reduce production cost.
>
> Hence many schematics will only contain a couple of different resistor =
> values, hence a simple pullup might be a 2.77k +- 0.1% because the size =
> and precission is necessary somewhere else in the schematic.
>
> Regards
> /Henrik
>
> -----Original Message-----
> From: peter zhu [mailto:peter.zhu@xxxxxxxxxx]
> Sent: 28. november 2002 12:47
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] How to select the pullup/pulldwon resistor
>
>
> Hi all:
> In hardware design, we often encounter the problem of pullup or pulldown =
> resistor, i very puzzled about it:
> 1.how to determine pullup or pulldown.
> 2.how to determine the value of pullup or pulldown resistor.
> These are two common hardware design problem. I hope can see some =
> detailed materials about it. Help me!
>
> Regards!
>
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
> List archives are viewable at: =20
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages=20
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
> =20
>
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
>
> -- Attached file included as plaintext by Ecartis --
> -- File: Wipro_Disclaimer.txt
>
> **************************Disclaimer************************************
>
> Information contained in this E-MAIL being proprietary to Wipro Limited is
> 'privileged' and 'confidential' and intended for use only by the
individual
> or entity to which it is addressed. You are notified that any use,
copying
> or dissemination of the information contained in the E-MAIL in any manner
> whatsoever is strictly prohibited.
>
>
***************************************************************************
>
>
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
