PIC18F1230 MICROCHIP [Microchip Technology], PIC18F1230 Datasheet - Page 64

• Manufacturer Part Number: PIC18F1230
• Description: 18/20/28-Pin, Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F1230/1330
FIGURE 5-8:
DS39758B-page 62
EXAMPLE INSTRUCTION: ADDWF, f, d, a (Opcode: 0010 01da ffff ffff)
When ‘a’ = 0 and f
The instruction executes in
Direct Forced mode. ‘f’ is
interpreted as a location in the
Access RAM between 060h
and 0FFh. This is the same as
locations
(Bank 0) and F80h to FFFh
(Bank 15) of data memory.
Locations below 60h are not
available in this addressing
mode.
When ‘a’ = 0 and f 5Fh:
The instruction executes in
Indexed Literal Offset mode. ‘f’
is interpreted as an offset to the
address value in FSR2. The
two are added together to
obtain the address of the target
register for the instruction. The
address can be anywhere in
the data memory space.
Note that in this mode, the
correct syntax is now:
ADDWF [k], d
where ‘k’ is the same as ‘f’.
When ‘a’ = 1 (all values of f):
The instruction executes in
Direct mode (also known as
Direct Long mode). ‘f’ is
interpreted as a location in
one of the 16 banks of the data
memory space. The bank is
designated by the Bank Select
Register (BSR). The address
can be in any implemented
bank in the data memory
space.
060h
COMPARING ADDRESSING OPTIONS FOR BIT-ORIENTED AND
BYTE-ORIENTED INSTRUCTIONS (EXTENDED INSTRUCTION SET ENABLED)
to
60h:
07Fh
Advance Information
FFFh
FFFh
F00h
F80h
FFFh
000h
060h
080h
100h
F00h
F80h
000h
080h
100h
F00h
F80h
000h
080h
100h
Data Memory
Data Memory
Data Memory
Bank 15
Bank 15
Bank 15
Bank 14
Bank 14
Bank 14
Bank 0
through
Bank 0
through
Bank 0
through
Bank 1
Bank 1
Bank 1
SFRs
SFRs
SFRs
001001da
00000000
001001da
BSR
Access RAM
© 2006 Microchip Technology Inc.
FSR2H
ffffffff
ffffffff
FSR2L
00h
60h
80h
FFh
Valid range
for ‘f’