Comments for CC2520: TI's Successor to the CC2420 - A Detailed Review at http://freaklabs.org , comment 1 to 11 out of 11 comments http://freaklabs.org Sat, 31 Jul 2010 03:06:25 +0100 FeedCreator 1.7.2 http://freaklabs.org/index.php/Blog/Zigbee/cc2520-versus-CC2420-review.html#comment-1149 The best way is just use a network analyzer and check to make sure your path from antenna to chip is 50 ohms. As for the RF231 and 3.3V IO, it should be fine. There should be no problem running it at that voltage. - Akiba Wed, 07 Jul 2010 00:05:05 +0100 http://freaklabs.org/index.php/Blog/Zigbee/cc2520-versus-CC2420-review.html#comment-1148 You have a nice blog here. I'm currently looking at at86rf231 and cc2520 for simple wireless connectivity on my xMOS board. It seems that it's nearly impossible (or I have failed so far) to obtain output impedance characteristics for cc2520. TI just won't give them, and most of the ANs do not show anything useful, and even less of it is related to cc2520. Is it possible that then only way to use this chip is to importthe layout they provide for single-ended antenna and use it? This is very disappointing if it's true... :( On the other hand, is there any way to get at86rf231 to be 3.3v IO tolerant? The supply can go up to 3.6v, but it seems that they always want (either internal or external) regulation to 1.8v. I would really like to avoid level shifters but it seems that it is impossible ... On the other hand, if they are .18u they probably do not have 3.3v tolerant digital IO. - rasha Tue, 06 Jul 2010 23:59:25 +0100 http://freaklabs.org/index.php/Blog/Zigbee/cc2520-versus-CC2420-review.html#comment-842 I would just say google it, but it might be kind of tough since many module makers dont want you to know what they're using. I'm sure its a popular chip to use, especially since there is a well documented interface to the CC2590 and CC2591 RF front ends. However I can't name any module makers that use it off the top of my head. - Akiba Fri, 05 Mar 2010 09:09:14 +0100 http://freaklabs.org/index.php/Blog/Zigbee/cc2520-versus-CC2420-review.html#comment-841 Anyone knowing about vendors that have nodes with cc2520 onboard. - mats nilsson Fri, 05 Mar 2010 06:01:47 +0100 http://freaklabs.org/index.php/Blog/Zigbee/cc2520-versus-CC2420-review.html#comment-825 hi,could any one show some detail of how to get a random number by cc2420? i tried but failed. i set the CCAMUX, read the LSB of ADCTST. but i always get 0. - coldfire Fri, 26 Feb 2010 10:12:42 +0100 http://freaklabs.org/index.php/Blog/Zigbee/cc2520-versus-CC2420-review.html#comment-284 Wow...that's a cool trick. I was using a free-running timer for the random seed generation, but this is much easier and doesn't take any timer resources. - Akiba Thu, 23 Apr 2009 01:44:30 +0100 http://freaklabs.org/index.php/Blog/Zigbee/cc2520-versus-CC2420-review.html#comment-283 By the way: You can create a random number on CC2420 using the ADCTST registers. Combining the I and Q branches of the ADC value gives you a true random number which one can use a seed for the C RTL rand() function, for example. - ubisys Thu, 23 Apr 2009 01:03:33 +0100 http://freaklabs.org/index.php/Blog/Zigbee/cc2520-versus-CC2420-review.html#comment-6 By the way, thanks for posting a comment. You're the first person to comment on my blog. - Akiba Thu, 06 Mar 2008 00:32:27 +0100 http://freaklabs.org/index.php/Blog/Zigbee/cc2520-versus-CC2420-review.html#comment-5 [s]Actually, the AT86RF230 is the first generation 802.15.4 chip from Atmel. [/s]There are many first generation radios: Microchip, Ubec, Freescale, and TI. What I meant was that it doesn't seem like anyone is focusing on making "just a radio" anymore. Everyone is just making integrated transceiver MCU chips which is only good in applications where Zigbee plays a central role. However many applications already have the central processor and just want to use Zigbee for simple wireless communications. Also, I talked with my friend at Atmel's Zigbee group in Dresden. Seems like they're working on a second generation Zigbee chip, but he can't say what type of chip it will be. I'm a little excited to see it. I'm in tight with the local Atmel disti in Tokyo. 2008-03-18 Update: Sorry, I had thought the comment was referring to the AT86RF210. After making the chip comparison guide, I realized that the AT86RF230 is not a first generation chip and actually, the specs are quite impressive. - Akiba Thu, 06 Mar 2008 00:30:10 +0100 http://freaklabs.org/index.php/Blog/Zigbee/cc2520-versus-CC2420-review.html#comment-3 Link disappeared.. trying again: AT86RF230: [url]http://www.atmel.com/dyn/products/product_card.asp?part_id=3941[/url]. - nobody Mon, 03 Mar 2008 23:42:08 +0100 http://freaklabs.org/index.php/Blog/Zigbee/cc2520-versus-CC2420-review.html#comment-2 "TI may just end up with the only up-to-date cost-competitive standalone transceiver." What about: ? - nobody Mon, 03 Mar 2008 23:40:34 +0100