PIC18F2420 MICROCHIP [Microchip Technology], PIC18F2420 Datasheet - Page 298

• Manufacturer Part Number: PIC18F2420
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2420/2520/4420/4520
POP
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
DS39631A-page 296
Q Cycle Activity:
Before Instruction
After Instruction
Decode
TOS
Stack (1 level down)
TOS
PC
Q1
operation
Pop Top of Return Stack
POP
None
(TOS)
None
The TOS value is pulled off the return
stack and is discarded. The TOS value
then becomes the previous value that
was pushed onto the return stack.
This instruction is provided to enable
the user to properly manage the return
stack to incorporate a software stack.
1
1
POP
GOTO
0000
Q2
No
bit bucket
0000
NEW
POP TOS
=
=
=
=
value
Q3
0031A2h
014332h
014332h
NEW
0000
operation
Q4
No
0110
Preliminary
PUSH
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
Q Cycle Activity:
Before Instruction
After Instruction
Decode
TOS
PC
PC
TOS
Stack (1 level down)
Q1
PC + 2 onto
return stack
Push Top of Return Stack
PUSH
None
(PC + 2)
None
The PC + 2 is pushed onto the top of
the return stack. The previous TOS
value is pushed down on the stack.
This instruction allows implementing a
software stack by modifying TOS and
then pushing it onto the return stack.
1
1
PUSH
PUSH
0000
Q2
 2004 Microchip Technology Inc.
TOS
0000
=
=
=
=
=
operation
Q3
No
345Ah
0124h
0126h
0126h
345Ah
0000
operation
Q4
No
0101