#include <avr/pgmspace.h>

const prog_char MyArray[] PROGMEM = {0x11, 0x12, 0x23, 0x53, 0xC2 .......}

flash unsigned char[256] //для 8-ми бит
{
0, //0
1, //1
3, //2
...
231 //255
}

/*****************************************************
CodeWizardAVR V2.03.4 Standard
Chip type : ATtiny25
Clock frequency : 1,000000 MHz
Memory model : Tiny
External RAM size : 0
Data Stack size : 32
*****************************************************/
#include <tiny25.h>
#include <delay.h>

#define ADC_VREF_TYPE 0xD0

unsigned int read_adc(unsigned char adc_input)
{
ADMUX=adc_input | (ADC_VREF_TYPE & 0xff);
delay_us(10);
ADCSRA|=0x40;
while ((ADCSRA & 0x10)==0);
ADCSRA|=0x10;
return ADCW>>2;
}

void main(void)
{
unsigned char v;
// Crystal Oscillator division factor: 1
#pragma optsize-
CLKPR=0x80;
CLKPR=0x00;
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif

PORTB=0x00;
DDRB=0x02;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: 1000,000 kHz
// Mode: Fast PWM top=FFh
// OC0A output: Disconnected
// OC0B output: Non-Inverted PWM
TCCR0A=0x23;
TCCR0B=0x01;
TCNT0=0x00;
OCR0A=0x00;
OCR0B=0x155;

// Analog Comparator: Off
ACSR=0x80;
ADCSRB=0x00;

// ADC initialization
// ADC Clock frequency: 125,000 kHz
// ADC Voltage Reference: 2.56V, cap. on AREF
// ADC Bipolar Input Mode: Off
// ADC Reverse Input Polarity: Off
// ADC Auto Trigger Source: None
// Digital input buffers on ADC0: On, ADC1: On, ADC2: On, ADC3: On
DIDR0&=0x03;
DIDR0|=0x00;
ADMUX=ADC_VREF_TYPE & 0xff;
ADCSRA=0x83;
ADCSRB&=0x5F;

while (1)
{
v=read_adc(1);
if(v<0xDE) OCR0B=v-1;
else{
if(v>0xFE) OCR0B=v-25;
else
OCR0B=0xD6;
}
delay_ms(10);
}
}