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gamegurus
Joined: 23 Jan 2011 Posts: 1
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New ICs PIC18F45K50 & PIC18F25K50 |
Posted: Mon Oct 22, 2012 10:44 am |
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Microchip has released the much awaited ICs for USB applications which works at 5V which are
PIC18F45K50 & PIC18F25K50.
These two new ICs replace the popular PIC18F4550 and PIC18F2550.
Microchip had low cost 3V versions till now which needed external regulator and crystal for USB. Moreover the new ICs are lower in cost and use built in crystal for USB operation.
I have been using CCS for over a year and recently I have acquired the two new ICs but stuck up without device support for the two new ICs.
The purpose of writing here on the forum is, How to proceed? Is there a database or header file we can modify and see it supported in CCS or do we have to wait for a new version from CCS to support the devices? Or can we compile for some similar IC and the same hex file works on new devices? |
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Ttelmah
Joined: 11 Mar 2010 Posts: 19515
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Posted: Mon Oct 22, 2012 11:39 am |
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Correct yourself slightly, it does _not_ have an internal crystal. What it has is a 1% internal RC oscillator, that performs a PLL adjustment when attached to a USB bus, to allow it to synchronise to the bus. If you want better than 1% accuracy when the USB bus is not attached, you still have to have a crystal.
Serously, talk to CCS, They will probably provde you with an update with support in a few days.
It is possible to edit an existing device and generate a new one with the device editor in the IDE, but it'd probably take longer than asking CCS to do it.
Best Wishes |
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asmboy
Joined: 20 Nov 2007 Posts: 2128 Location: albany ny
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Posted: Mon Oct 22, 2012 3:47 pm |
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Quote: |
it does _not_ have an internal crystal.
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That makes me wish more than ever that Microchip
would find a way to incorporate even ONE choice of
a single useful MEMS oscillator in PIC family parts - say at 8mhz.
Present technology MEMS oscillators are available with fundamental
frequencies up to 20 mhz or so with near crystal accuracy, stability and low jitter. Just not inside the PIC.
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