Jinx wrote:

> I had presumed the 4550 could be treated basically like a 452 or
> 4520, which is what I'm porting a lot of code from, and with which

Hi Jinx, its ocillator is very different from 452... and 4520 too, due 
to the USB thing.
Apart from that, yes, it should work similarly.

Here are my settings for a USB project:

#pragma config WDT = ON, WDTPS = 1024, MCLRE=ON, STVREN=ON, LVP=OFF
#pragma config PLLDIV=2, CPUDIV=OSC1_PLL2, USBDIV=2, FOSC=HSPLL_HS, 
IESO=OFF, PWRT=OFF, BOR=ON, BORV=2
#pragma config VREGEN=ON, LPT1OSC=OFF, PBADEN=OFF, CCP2MX=ON, XINST=OFF, 
DEBUG=OFF


(C18) 8 MHz crystal, core running @48MHz: do consider this, since max 
freq for 452/4520 is 40MHz.

-- 
Ciao, Dario
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