can any one explain program counter in pic 16f877a??explain the below code

[rangerskm]

goto K

Go to label 'k' instruction

Operand: 0 ≤ K ≤ 2047 (11-bit address is specified)
Operation: K PC <10:0>
PCLATH <4:3> PC <12:11>

whats pclath <4:3> PC <12:11>

 

[keith1200rs]

Read section 2.3 & 2.4 page 30 of the datasheet. K is not big enough to address the whole memory space so the upper bits come from PCLATH. The program counter is 13 bits but K is only 11 bits.

Keith

 

[rangerskm]

what means pclath<4:3>PC<12:11>??

 

[jayanth.devarayanadurga]

bit4 to bit3 of PCLATH

bits12 and 11 of PC.

Is PC (Program Counter) 2 bytes wide?

 

[keith1200rs]

what means pclath<4:3>PC<12:11>??

You are misquoting the datasheet. What it says is:


Which means k is copied to the first 11 bits of the program counter (PC) and bits PCLATH bits 4 and 3 are copied to bits 12 and 11 of PC respectively.

Keith