PC87591L datasheet(434/437 Pages) NSC

434 / 437 page

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434

Revision 1.07

Software for Hardware Interface

B.1

FACTORY PARAMETERS

The following table is stored in the factory parameters section of the flash.

RevisionCode Interpretation

●

00xx16 - Pre-production versions; contact NSC for usage guidelines.

●

01xx16 - Production version xx of PC87591x devices (xx is a version number starting with 0x00).

●

02xx16 - Production version xx of PC87591x devices with special handling noted in user information.

●

FFxx16 - A non-tested device; contact National Semiconductor for usage guidelines.

●

Other - Reserved for future use.

The ADC should be initialized after reset with the factory parameters setting that are stored in flash memory. The code below

is an example of how the data may be loaded into the ADC.

#define IBAI

(*((volatile unsigned short *)0xF880))

#define IBD

(*((volatile unsigned short *)0xF882))

#define ADCPINX

(*((volatile unsigned char*)0xFF2A))

#define ADCPD

(*((volatile unsigned int *)0xFF2C))

void CalibrateADC()

{

unsigned int i, count;

IBAI = 0x0000;

// Set address to RevisionCode

if ( (IBD & 0xff00) == 0x0100)

// Check that RevisionCode is 0x01yy;

// refer to user information on

// other cases.

{

// Factory Parameters are programed with the correct version

IBAI= 0x0002;

// Set address to ‘count’

count = IBD;

// Read the number of elements to copy

for (i=1; i<= count ; i++)

{

ADCPINX = (unsigned char)i;

// Set pointer in ADC register

IBAI = 2*i+2;

// Set pointer in Flash

ADCPD

= IBD;

// Copy from flash to ADC register

}

ADCPINX = 0x00;

// change the index back to the default register.

ADCPD = 0x0001;

// Lock the ADC calibration registers.}

}

Information Block Address

Data [Word]

000016

unsigned int RevisionCode

000216

unsigned int count

007C16

Copy of SRID register indication for the

device revision number.

For PC87591E: FF0n16

For PC87591S: FF2n16

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