[PIC]: 18F47K40 HLVD

[Anthony Nixon]

Hi all,

I'm trying to use the Hi Lo Voltage detect on a 18F47K40 but it
doesn't seem to work.

I have enabled the module via the CMD0 bit 6 = 0


BANKSEL HLVDCON1
movlw b'00001010' ; 3.7V
movwf HLVDCON1,BANKED
movlw b'10000000'
movwf HLVDCON0,BANKED ; HLVD enabled, no IRQ flags
nop
movf HLVDCON0,W,BANKED
call pcXmit ; W -> PC - proper banking set - sends 0x00
...

I set bit7 of HLVDCON0 to enable it but when I read the HLVDCON0 value
back via a PC USB port, (which I know works) it stays as 0x00.

(BANKSEL HLVDCON0 has the same problem)

Looking around the web, other 18F models seem to use it ok.

Any ideas

cheers

Tony