Hi Erik,

Thanks for the reply. Yes I looked but Code Architect produced 6 pages of output just to initialize the PWM channels.

I have since found the problem in the code. For those interested, the difference that made it work was to substitute the ORL statement for the MOV statement in the following bits of code:

	mov	TOR2H,#00h	;16 bit timer reload value for PWM (Hi Byte)
	mov	TOR2L,#0ffh	;16 bit timer reload value for PWM (Lo Byte)
	orl	TCR21,#10000000b	;Latch in the TOR2H/L values

	mov	OCRBH,#00h	;CCU channel B Compare value (Hi byte)
	mov	OCRBL,#0fh	;CCU channel B Compare value (Lo byte)
	orl	TCR21,#10000000b	;Update duty cycle

	mov	OCRCH,#00h	;CCU channel C Compare value (Hi byte)
	mov	OCRCL,#0fh	;CCU channel C Compare value (Lo byte)
	orl	TCR21,#10000000b	;Update duty cycle