Microcontroladores - S6A0069 are HD44780 compatible ?

Somebody know if the S6A0069 are HD44780 compatible ?

, my display does not work well with the example.

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PIC = 16F84A
xt = 4 Mhz
interface = 8 bits
software =MikroC
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char *text = "mikroElektronika";

void main() {

TRISA = 0; // PORTA is output
TRISB = 0; // PORTB is output

// Initialize LCD at PORTA and PORTB with custom pin settings

Lcd8_Config(&PORTA,&PORTB,0,1,2,0,1,2,3,4,5,6,7); (my pinout)

Lcd8_Cmd(LCD_CURSOR_OFF); // Turn off cursor
Lcd8_Out(1, 1, text); // Print text at LCD

}
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P.D.: what is the difference between 8 bit interface and 4 bits interface ?

thank you very much