On the 845 chip there are two 8 bit registers TL2 & TH2 which act as an increment counter. I came across this Analog Devices sample code and I'm trying to understand why these registers were initialized the way they are. Does anyone have any idea?

...insert code here
 

#include <stdio.h>
#include <ADuC845.h>

sbit LED = 0x0B4;

void interrupt_0 () interrupt 5
{
LED ^= 1;
TF2 = 0;
}


void main (void)
{
ET2 = 1; //Enable Timer 2 Interrupt
TL2 = 0x0; //?
TH2 = 0x67; //?
RCAP2L = 0x0; //Timer2 Capture/reload Low Byte
RCAP2H = 0x67; //Timer2 Capture/reload High Byte

EA = 1; //Enable Interrupts
T2CON = 0x04; //Timer2 Start

while(1);
}