CY8C5888LTI vs CY8C5888LTQ

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
segev
Level 1
Level 1
5 sign-ins First reply posted First question asked

Hello, 

Why in the pSoc creator there is a selection for  CY8C5888LTI-LP097 , and selection for 

vs CY8C5888LTQ-LP097 , what would be the difference software wise?

is there additional difference other the industrial range vs extended range?

that i need to consider? 

Will compiling and programming to CY8C5888LTI-LP097 into CY8C5888LTQ-LP097 is the same?

and vice versa ?

 

Thank you

 

 

0 Likes
1 Solution
DennisS_46
Employee
Employee
100 sign-ins 50 likes received 50 solutions authored

Above answer is almost correct. LTI and LTQ parts have identical chip ID: 0x2E161069.
You can program as either part, but you may have some performance difficulty as mentioned at elevated temperatures on LTI part.

---- Dennis Seguine, PSoC Applications Engineer

View solution in original post

0 Likes
6 Replies
BiBi_1928986
Level 7
Level 7
First comment on blog 500 replies posted 250 replies posted

Hello.

You've somewhat answered your own question.  Yes, it's the operating temperature difference between those two devices that makes them unique.

The "extended" device (LTQ) has a wider operating temperature range vs industrial (LTI).  When you build a project with LTQ as the target device, PSoC Creator will use the extended temperature range as a parameter when calculating on-chip UDB timing (setup/hold/delays, etc), GPIO routing to various UBD logic, etc.

Likewise, when building a project with LTI target, the timing analysis will be based on using a narrower temperature range parameter.

edit: based on new info from Dennis (next msg below this one).
Can you program a hex file into LTQ when built for LTI?  No. Yes.
Can you program a hex file into LTI when built for LTQ?  No. Yes.
The reason being, PSoC Programmer checks the chip ID before programming.  If the ID does not match the hex file info, it won't program the device.

That said, some people found you could program the alternate device using PSoC Creator.  I've not tried this and would not recommend it.

There's not likely to be a software difference.  If there was, it'll be related to hardware limitations where for example, the timing analysis says you can't meet a certain setup time constraint, therefore you have to slow a clock down somewhere (I'm generalizing here).  So maybe with the 'other' device, you can use a faster clock.

If you were to use emEEPROM (emulated EEPROM), it's write speed relies on temperature as a parameter.  So, you might hit a boundary where writing is slower than expected (using LTQ vs LTI).

Hope you found this helpful.
Good luck with your project.

0 Likes

So, all i need to concern about is to get the compilation of LTQ and LTI without timing warnings?

In the sentence "So maybe with the 'other' device, you can use a faster clock."

what is 

0 Likes

Hello,

Is it enough to do testing on LTQ? and run it on LTI? in term of Eprom, and stability?

we don't use the high end of speed performance. but we do need stability.

Segev

0 Likes
DennisS_46
Employee
Employee
100 sign-ins 50 likes received 50 solutions authored

Above answer is almost correct. LTI and LTQ parts have identical chip ID: 0x2E161069.
You can program as either part, but you may have some performance difficulty as mentioned at elevated temperatures on LTI part.

---- Dennis Seguine, PSoC Applications Engineer

0 Likes

Hi Dennis.

Thanks for clarifying ability to program same load into both LTI and LTQ.  That's the first I've heard that this can be done.  Very useful capability indeed.

0 Likes
DennisS_46
Employee
Employee
100 sign-ins 50 likes received 50 solutions authored

The only specified difference at 85 or 105 is for the internal voltage reference. ALL other specs are the same. You can build and program with either LTI or LTQ because they have the same chip ID.
---- Dennis

0 Likes