PIC18F6390 Datasheet, PDF (327/412 Pages) Microchip Technology – 64/80-Pin Flash Microcontrollers with LCD Driver and nanoWatt Technology

PIC18F6390/6490/8390/8490
RCALL
Relative Call
Syntax:
RCALL n
Operands:
-1024 ≤ n ≤ 1023
Operation:
(PC) + 2 → TOS,
(PC) + 2 + 2n → PC
Status Affected:
None
Encoding:
1101 1nnn nnnn nnnn
Description:
Subroutine call with a jump up to 1K
from the current location. First, return
address (PC + 2) is pushed onto the
stack. Then, add the 2’s complement
number ‘2n’ to the PC. Since the PC will
have incremented to fetch the next
instruction, the new address will be
PC + 2 + 2n. This instruction is a
two-cycle instruction.
Words:
1
Cycles:
2
Q Cycle Activity:
Q1
Decode
No
operation
Q2
Read literal
‘n’
PUSH PC to
stack
No
operation
Q3
Process
Data
No
operation
Q4
Write to PC
No
operation
Example:
HERE
RCALL Jump
Before Instruction
PC = Address (HERE)
After Instruction
PC = Address (Jump)
TOS = Address (HERE + 2)
RESET
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Q1
Decode
Reset
RESET
None
Reset all registers and flags that are
affected by a MCLR Reset.
All
0000 0000 1111 1111
This instruction provides a way to
execute a MCLR Reset in software.
1
1
Q2
Start
Reset
Q3
No
operation
Q4
No
operation
Example:
RESET
After Instruction
Registers =
Flags* =
Reset Value
Reset Value
 2004 Microchip Technology Inc.
Preliminary
DS39629B-page 325