PIC18LF2221-I/SS Microchip Technology, PIC18LF2221-I/SS Datasheet - Page 321
![IC PIC MCU FLASH 2KX16 28SSOP](/photos/6/81/68119/150-28-ssop_sml.jpg)
PIC18LF2221-I/SS
Manufacturer Part Number
PIC18LF2221-I/SS
Description
IC PIC MCU FLASH 2KX16 28SSOP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC18F2221-ISO.pdf
(402 pages)
2.PIC18F2221-ISO.pdf
(8 pages)
3.PIC18F2221-ISO.pdf
(30 pages)
4.PIC18F2221-ISO.pdf
(46 pages)
5.PIC18LF2221-IML.pdf
(394 pages)
Specifications of PIC18LF2221-I/SS
Core Size
8-Bit
Program Memory Size
4KB (2K x 16)
Core Processor
PIC
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, HLVD, POR, PWM, WDT
Number Of I /o
25
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 10x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SSOP
Controller Family/series
PIC18
No. Of I/o's
25
Eeprom Memory Size
256Byte
Ram Memory Size
512Byte
Cpu Speed
40MHz
No. Of Timers
4
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC18LF2221-I/SS
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
- PIC18F2221-ISO PDF datasheet
- PIC18F2221-ISO PDF datasheet #2
- PIC18F2221-ISO PDF datasheet #3
- PIC18F2221-ISO PDF datasheet #4
- PIC18LF2221-IML PDF datasheet #5
- Current page: 321 of 402
- Download datasheet (7Mb)
25.2
In addition to the standard 75 instructions of the PIC18
instruction set, PIC18F2221/2321/4221/4321 family
devices also provide an optional extension to the core
CPU functionality. The added features include eight
additional instructions that augment indirect and
indexed addressing operations and the implementation
of Indexed Literal Offset Addressing mode for many of
the standard PIC18 instructions.
The additional features of the extended instruction set
are disabled by default. To enable them, users must set
the XINST Configuration bit.
The instructions in the extended set (with the exception
of CALLW, MOVSF and MOVSS) can all be classified as
literal operations, which either manipulate the File
Select Registers, or use them for indexed addressing.
Two of the instructions, ADDFSR and SUBFSR, each
have an additional special instantiation for using FSR2.
These versions (ADDULNK and SUBULNK) allow for
automatic return after execution.
The extended instructions are specifically implemented
to optimize re-entrant program code (that is, code that
is recursive or that uses a software stack) written in
high-level languages, particularly C. Among other
things, they allow users working in high-level
languages to perform certain operations on data
structures more efficiently. These include:
• Dynamic allocation and deallocation of software
• Function Pointer invocation
• Software Stack Pointer manipulation
• Manipulation of variables located in a software
TABLE 25-3:
© 2009 Microchip Technology Inc.
ADDFSR
ADDULNK
CALLW
MOVSF
MOVSS
PUSHL
SUBFSR
SUBULNK
stack space when entering and leaving
subroutines
stack
Mnemonic,
Operands
Extended Instruction Set
f, k
k
z
z
k
f, k
k
s
s
, f
, z
d
EXTENSIONS TO THE PIC18 INSTRUCTION SET
d
Add Literal to FSR
Add Literal to FSR2 and Return
Call Subroutine using WREG
Move z
Move z
Store Literal at FSR2,
Subtract Literal from FSR
Subtract Literal from FSR2 and
PIC18F2221/2321/4221/4321 FAMILY
Decrement FSR2
Return
f
z
d
s
s
d
(destination) 2nd Word
(source) to
(source) to 1st word
(destination) 2nd Word
Description
1st Word
Cycles
1
2
2
2
2
1
1
2
A summary of the instructions in the extended instruction
set is provided in Table 25-3. Detailed descriptions are
provided in Section 25.2.2 “Extended Instruction
Set”. The opcode field descriptions in Table 25-1
(page 280) apply to both the standard and extended
PIC18 instruction sets.
25.2.1
Most of the extended instructions use indexed
arguments, using one of the File Select Registers and
some offset to specify a source or destination register.
When an argument for an instruction serves as part of
indexed addressing, it is enclosed in square brackets
(“[ ]”). This is done to indicate that the argument is used
as an index or offset. The MPASM™ Assembler will
flag an error if it determines that an index or offset value
is not bracketed.
When the extended instruction set is enabled, brackets
are also used to indicate index arguments in byte-
oriented and bit-oriented instructions. This is in addition
to other changes in their syntax. For more details, see
Section 25.2.3.1 “Extended Instruction Syntax with
Standard PIC18 Commands”.
Note:
Note:
1110
1110
0000
1110
1111
1110
1111
1110
1110
1110
MSb
16-Bit Instruction Word
provided as a reference for users who may
The instruction set extension and the
Indexed Literal Offset Addressing mode
were designed for optimizing applications
written in C; the user may likely never use
these instructions directly in the assembler.
The syntax for these commands is
be reviewing code that has been generated
by a compiler.
EXTENDED INSTRUCTION SYNTAX
In the past, square brackets have been
used to denote optional arguments in the
PIC18 and earlier instruction sets. In this
text
arguments are denoted by braces (“{ }”).
1000
1000
0000
1011
ffff
1011
xxxx
1010
1001
1001
and
0zzz
ffff
1zzz
xzzz
kkkk
ffkk
11kk
ffkk
11kk
0001
going
kkkk
kkkk
0100
zzzz
ffff
zzzz
zzzz
kkkk
kkkk
kkkk
LSb
forward,
DS39689F-page 321
Affected
Status
None
None
None
None
None
None
None
None
optional
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