PCM18XT0 Microchip Technology, PCM18XT0 Datasheet - Page 411

• Manufacturer Part Number: PCM18XT0
• Description: MODULE PROC PIC18F4685
• Manufacturer: Microchip Technology

Specifications of PCM18XT0

• Accessory Type: Processor Module
• Product: Microcontroller Modules
• Core Processor: PIC18F4685
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: ICE2000
• For Use With: ICE2000 - EMULATOR MPLAB-ICE 2000 POD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Not applicable / Not applicable

SUBFSR
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
© 2009 Microchip Technology Inc.
Q Cycle Activity:
Before Instruction
After Instruction
Decode
FSR2
FSR2
Q1
=
=
register ‘f’
Subtract Literal from FSR
SUBFSR f, k
0 ≤ k ≤ 63
f ∈ [ 0, 1, 2 ]
FSRf – k → FSRf
None
The 6-bit literal ‘k’ is subtracted from
the contents of the FSR specified
by ‘f’.
1
1
SUBFSR 2, 23h
Read
1110
Q2
03FFh
03DCh
1001
Process
Data
Q3
ffkk
destination
Write to
PIC18F2682/2685/4682/4685
kkkk
Q4
SUBULNK
Syntax:
Operands:
Operation:
Status Affected: None
Encoding:
Description:
Words:
Cycles:
Example:
Q Cycle Activity:
Before Instruction
After Instruction
Operation
Decode
No
FSR2
PC
FSR2
PC
Q1
Subtract Literal from FSR2 and Return
SUBULNK k
0 ≤ k ≤ 63
FSR2 – k → FSR2,
(TOS) → PC
The 6-bit literal ‘k’ is subtracted from the
contents of the FSR2. A RETURN is then
executed by loading the PC with the TOS.
The instruction takes two cycles to execute;
a NOP is performed during the second cycle.
This may be thought of as a special case of
the SUBFSR instruction, where f = 3 (binary
‘11’); it operates only on FSR2.
1
2
1110
=
=
=
=
Operation
register ‘f’
SUBULNK 23h
Read
No
Q2
03FFh
0100h
03DCh
(TOS)
1001
Operation
Process
Data
No
Q3
DS39761C-page 411
11kk
destination
Operation
Write to
No
kkkk
Q4