Dear Forum Members,

1. I make a porting from P89C51RD2 to P89C668.
Change all Header files #ifdef<> and adapt one of the PCA
counters .PCA4 instead of PCA3.
(I understanding P89Cc668 doesn't 100% pin compatible).

2. It looks like that the problem is the inability to make the following configuration :

void Initial_PCA(void)
{
CMOD = 0x07; //PCA Counter Mode
CCAPM1 = 0x4C; //ÐCA Module 1
CCAPM2 = 0x4C; // PCA Module 2O
CCAPM3 = 0x49; //Ç 3 PCA
}->

I can do it via a quick PCA program - main() which
initialize the PCA - Initial_PCA(void) plus setting
CCAP#L= (BYTE)(wTemp);
CCAP#H= (BYTE)(wTemp>>8);
make PCA activation ,Than catch via CCF#. This is working
well).
Also If I make a B.P after CCAPM3 I expect to see
0xC9 it's actually 0x49 plus 1 internal msb.Also I can
change the CCAPM# value via the Emulator.

3. My big problem is with PCA Initialization above the
Operational software !!!.
The CCAPM# value after the Initial line
is 0xFF.I can't able to make any Change the value.
Therefore the PCA's doesn't expired and cause to inaptitude
finish porting to P89Cc668.

4. I'll appreciate if u can light up on this issue. Maybe it's
some more difference between P89C51RD2 to P89C668 idata,
xdata and etc. Maybe I doesn't paid attention to
something ...

Looking forward to any advice / direction.

10 x

Moshe Drori IMG