EM4200 chip compatibility?

Technical Discussion on the PhidgetRFID
booherbg
Fresh meat
Posts: 2
Joined: Wed Jun 18, 2014 1:26 pm
Contact:

EM4200 chip compatibility?

Postby booherbg » Wed Jun 18, 2014 1:28 pm

Hi guys,

Simple question: Does anyone have an EM4200 RFID chip/device that they can test with their scanner? They (the specs put out by the company who makes the chip) claim to be "backwards compatible" but I can't find any evidence one way or another (or if you need to program them a certain way, or if they're backwards compatible by default).

I'd love to order a scanner but I need to figure this out first, as most vendors we're sourcing from have moved from EM4102 to EM4200. I'd also like to know this for purpose of future-proofing our product that will utilize the scanner. Thanks!

Sources:
http://www.emmicroelectronic.com/webfil ... 200_DS.pdf
http://www.cardid.ro/datasheet/EM/EM4200.pdf

User avatar
Patrick
Lead Developer
Posts: 3049
Joined: Mon Jun 20, 2005 8:46 am
Location: Canada
Contact:

Re: EM4200 chip compatibility?

Postby Patrick » Thu Jun 19, 2014 9:08 am

This really depends on how they are programmed. EM4200 chips have 128 bytes of memory on them and they can be programmed in lots of different ways - including the EM4100 protocol, but also ISO11785, and lots of others.

If the manufacturer says that they are compatible with EM4100, then that should mean that they have programmed them with the EM4100 protocol - EM4200 cards are read-only, so that have to be programmed at the factory.

The reason that they are moving from the old EM4102 to EM4200 is just because the older silicon is being phased out by EM Microelectronic.

-Patrick

booherbg
Fresh meat
Posts: 2
Joined: Wed Jun 18, 2014 1:26 pm
Contact:

Re: EM4200 chip compatibility?

Postby booherbg » Thu Jun 26, 2014 4:45 pm

Thanks for the answer! So for backwards compatibility, I need to get EM4200 chips that are programmed appropriately, and then wait until the Phidget Scanner gets updated with EM4200 compatibility ( 8) )

Are you guys concerned about end-of-life with the EM4100/4102 chips with regards to your scanners and hardware? Or is this more of a "in the next ten years" kind of thing?

PS: Your libraries are amazing, thanks for the awesome work. I feel kind of embarrassed at how little work there is involved with getting my raspberry pi online -- I hardly have to write any python!

User avatar
Patrick
Lead Developer
Posts: 3049
Joined: Mon Jun 20, 2005 8:46 am
Location: Canada
Contact:

Re: EM4200 chip compatibility?

Postby Patrick » Fri Jun 27, 2014 9:06 am

Nope no waiting - our reader will support EM4200 chips right now, so long as they are programmed with tag data using the EM4100 protocol - because in this configuration the EM4200 chips would be indistinguishable from and EM4100 or EM4102 chip.

-Patrick


Return to “RFID”

Who is online

Users browsing this forum: No registered users and 1 guest