Philips P89LPC903 - Manual (Page 99)

Philips Semiconductors User’s Manual - Preliminary -
P89LPC901/902/903 FLASH PROGRAM MEMORY
2003 Dec 8
99
Figure 14-6: C-language routine to read a flash element
User Configuration Bytes
A number of user-configurable features of the P89LPC901/902/903 must be defined at power-up and therefore cannot be set by
the program after start of execution. These features are configured through the use of Flash byte UCFG1 shown in Figure 14-7.
#include
unsigned char READ_EL (unsigned char);
unsigned char GET_EL;
void main ()
{
GET_EL = READ_EL(0x02);
}
unsigned char READ_EL (unsigned char el_addr)
{
#define CONF 0x6C // access flash elements
unsigned char el_data; // local for element data
FMADRL = el_addr; //write element address to addr reg
FMCON = CONF; //access flash elements command
el_data = FMDATA; /read the element data
return(el_data);
}