Hi all,
I'm upgrading my 16F84-based datalogger  with 16F628. In the first step I
want substitute '84 in a pin-to-pin compatible  configuration with '628, on
the same socket and PCB layout. I have modified the code in this sections:

1) Config word  11110000100001B (13 I/O pin, external mclr, 4MHz, power up
timer enabled, WDT disabled)
2) User registers stating from 20H (  0CH on '84)
3) Comparators disabled:

movlw  H'07'  ;
movwf  CMCON ;

4) EEPROM routines revised (from PICLIST...) for banks difference.

Surprise, the first tests are all ok!!! (the logger is running from two
days). The only difference is a higher current consumption on the '628 (1050
uA versus 700uA of the '84) when the logger isn't in sleep. When in sleep
mode, the values are similar (35uA the '628 and 50uA for '84).  My
configuration :

Supply = 4,5V (3 AA)
Freq. = 4MHZ
CD4060 at 33Khz (to wake-up the PIC) connected on RB0/int

Really, this isn't a serious problem (the 99% of time the logger is in
sleep), however I want to be sure that there isn't an error in
configuration: has anyone a idea which area I can test to find the solution?
At the moment I have programmed two '628 and the values observed are
similar.

Thanks
Marco

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