PIC18F45K22-I/P Microchip Technology Inc., PIC18F45K22-I/P Datasheet - Page 367
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PIC18F45K22-I/P
Manufacturer Part Number
PIC18F45K22-I/P
Description
40 PDIP .600in TUBE, 32KB, Flash, 1536bytes-RAM, 8-bit Family, nanoWatt XLP
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F45K22-IP.pdf
(496 pages)
Specifications of PIC18F45K22-I/P
A/d Inputs
28-Channel, 10-Bit
Comparators
2
Cpu Speed
16 MIPS
Eeprom Memory
256 Bytes
Input Output
35
Interface
I2C/SPI/UART/USART
Memory Type
Flash
Number Of Bits
8
Package Type
40-pin PDIP
Programmable Memory
32K Bytes
Ram Size
1.5K Bytes
Speed
64 MHz
Temperature Range
–40 to 125 °C
Timers
3-8-bit, 4-16-bit
Voltage, Range
1.8-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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25.0
PIC18(L)F2X/4XK22 devices incorporate the standard
set of 75 PIC18 core instructions, as well as an extended
set of 8 new instructions, for the optimization of code that
is recursive or that utilizes a software stack. The
extended set is discussed later in this section.
25.1
The standard PIC18 instruction set adds many
enhancements to the previous PIC
sets, while maintaining an easy migration from these
PIC
single program memory word (16 bits), but there are
four instructions that require two program memory
locations.
Each single-word instruction is a 16-bit word divided
into an opcode, which specifies the instruction type and
one or more operands, which further specify the
operation of the instruction.
The instruction set is highly orthogonal and is grouped
into four basic categories:
• Byte-oriented operations
• Bit-oriented operations
• Literal operations
• Control operations
The PIC18 instruction set summary in
byte-oriented, bit-oriented, literal and control
operations.
descriptions.
Most byte-oriented instructions have three operands:
1.
2.
3.
The file register designator ‘f’ specifies which file
register is to be used by the instruction. The destination
designator ‘d’ specifies where the result of the opera-
tion is to be placed. If ‘d’ is zero, the result is placed in
the WREG register. If ‘d’ is one, the result is placed in
the file register specified in the instruction.
All bit-oriented instructions have three operands:
1.
2.
3.
The bit field designator ‘b’ selects the number of the bit
affected by the operation, while the file register
designator ‘f’ represents the number of the file in which
the bit is located.
2010 Microchip Technology Inc.
®
The file register (specified by ‘f’)
The destination of the result (specified by ‘d’)
The accessed memory (specified by ‘a’)
The file register (specified by ‘f’)
The bit in the file register (specified by ‘b’)
The accessed memory (specified by ‘a’)
MCU instruction sets. Most instructions are a
INSTRUCTION SET SUMMARY
Standard Instruction Set
Table 25-1
shows the opcode field
®
MCU instruction
Table 25-2
lists
Preliminary
The literal instructions may use some of the following
operands:
• A literal value to be loaded into a file register
• The desired FSR register to load the literal value
• No operand required
The control instructions may use some of the following
operands:
• A program memory address (specified by ‘n’)
• The mode of the CALL or RETURN instructions
• The mode of the table read and table write
• No operand required
All instructions are a single word, except for four
double-word instructions. These instructions were
made double-word to contain the required information
in 32 bits. In the second word, the 4 MSbs are ‘1’s. If
this second word is executed as an instruction (by
itself), it will execute as a NOP.
All single-word instructions are executed in a single
instruction cycle, unless a conditional test is true or the
program counter is changed as a result of the instruc-
tion. In these cases, the execution takes two instruction
cycles, with the additional instruction cycle(s) executed
as a NOP.
The double-word instructions execute in two instruction
cycles.
One instruction cycle consists of four oscillator periods.
Thus, for an oscillator frequency of 4 MHz, the normal
instruction execution time is 1 s. If a conditional test is
true, or the program counter is changed as a result of
an instruction, the instruction execution time is 2 s.
Two-word branch instructions (if true) would take 3 s.
Figure 25-1
tions can have. All examples use the convention ‘nnh’
to represent a hexadecimal number.
The Instruction Set Summary, shown in
lists the standard instructions recognized by the
Microchip Assembler (MPASM
Section 25.1.1 “Standard Instruction Set”
a description of each instruction.
(specified by ‘k’)
into (specified by ‘f’)
(specified by ‘—’)
(specified by ‘s’)
instructions (specified by ‘m’)
(specified by ‘—’)
PIC18(L)F2X/4XK22
shows the general formats that the instruc-
TM
).
DS41412D-page 367
Table
provides
25-2,
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