Microchip Technology MA160014 Data Sheet
2010-2012 Microchip Technology Inc.
DS41412F-page 93
PIC18(L)F2X/4XK22
FIGURE 5-11:
COMPARING ADDRESSING OPTIONS FOR BIT-ORIENTED AND
BYTE-ORIENTED INSTRUCTIONS (EXTENDED INSTRUCTION SET ENABLED)
BYTE-ORIENTED INSTRUCTIONS (EXTENDED INSTRUCTION SET ENABLED)
EXAMPLE INSTRUCTION: ADDWF, f, d, a (Opcode: 0010 01da ffff ffff)
When ‘a’ = 0 and f
60h:
The instruction executes in
Direct Forced mode. ‘f’ is inter-
preted as a location in the
Access RAM between 060h
and 0FFh. This is the same as
locations F60h to FFFh
(Bank 15) of data memory.
Direct Forced mode. ‘f’ is inter-
preted as a location in the
Access RAM between 060h
and 0FFh. This is the same as
locations F60h to FFFh
(Bank 15) of data memory.
Locations below 60h are not
available in this addressing
mode.
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.
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’.
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 inter-
preted 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.
Direct mode (also known as
Direct Long mode). ‘f’ is inter-
preted 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.
000h
060h
100h
F00h
F60h
FFFh
Valid range
00h
60h
FFh
Data Memory
Access RAM
Bank 0
Bank 1
through
Bank 14
Bank 15
SFRs
000h
060h
100h
F00h
F60h
FFFh
Data Memory
Bank 0
Bank 1
through
Bank 14
Bank 15
SFRs
FSR2H
FSR2L
ffffffff
001001da
ffffffff
001001da
000h
060h
100h
F00h
F60h
FFFh
Data Memory
Bank 0
Bank 1
through
Bank 14
Bank 15
SFRs
for ‘f’
BSR
00000000