update pic18f4550

[cvargcal]

Hi, someone can say me what is the evolution of this PIC? and if the compiler IDE has support.

I need a pic with 2 UART and 1 USB, but XPL.

Thanks

[temtronic]

You need to check Microchip's website and search for a part. I've settled on the 18F46K22 for 99% of my projects, using an external TTL<>USB module that only cost $1. Do you need 2 complete HW UARTS AND USB ? If you only need to transmit, then you code use the CCS 'bit-banged' UART SW.
I have no idea what 'XPL' means.
Jay

[newguy]

[temtronic]

hmm... I'm wondering HOW can you have XLP and USB ? After all If you have USB, you have LOTS of power (OK, typically 5 watts) available.

A better description of the project would be nice.
Jay

[newguy]

[temtronic]

hmm if USB is only for 'data extraction' , then a 2 HW UART PIC should work as 1 UART could be configured to do double duty' a)...'normal' operation, b)... upload to PC via a TTL<>USB module..
This would get rid of the need for a PIC with internal USB( and driver).

Just thinking of options...

Jay

[Ttelmah]

Key thing is that you have to turn off the USB peripheral when the USB cable
is not attached. Otherwise the power drawn by the USB drivers, rules out
'XLP' capabilities.
Honestly the 4550, is a 'first generation' chip. Something like the 18F44J50
(or 45J50 for more ROM), is a 'better' chip.
XLP. The peripherals largely support PPS, so much more flexible on pin
selection. However does mean you have to work at 3.3v, instead of 5v.

[newguy]

PMD (peripheral module disable) is also a godsend when it comes to extremely low power devices. The modern processors have it, but not the older legacy variants.

[cvargcal]

Thanks to everyone...
I liked the PIC18F45J50, has 2 uart and 1 USB.
Perfect, thanks


The XLP is for use battery while has not connect to usb.