PIC18F8722-I/PT Microchip Technology Inc., PIC18F8722-I/PT Datasheet - Page 73
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PIC18F8722-I/PT
Manufacturer Part Number
PIC18F8722-I/PT
Description
80 PIN, 128 KB FLASH, 4K RAM, 70 I/O
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F8722-IPT.pdf
(448 pages)
Specifications of PIC18F8722-I/PT
A/d Inputs
16-Channel, 10-Bit
Comparators
2
Cpu Speed
10 MIPS
Eeprom Memory
1024 Bytes
Input Output
70
Interface
SPI/I2C/USART
Memory Type
Flash
Number Of Bits
8
Package Type
80-pin TQFP
Programmable Memory
128K Bytes
Ram Size
3.9K Bytes
Speed
40 MHz
Timers
2-8 bit, 3-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F8722-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
Part Number:
PIC18F8722-I/PT
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
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5.2.4
The standard PIC18 instruction set has 8 two-word
instructions: CALL, MOVFF, GOTO, LSFR, ADDULNK,
CALLW,
second word of the instructions always has ‘1111’ as
its four Most Significant bits; the other 12 bits are literal
data, usually a data memory address.
The use of ‘1111’ in the 4 MSbs of an instruction spec-
ifies a special form of NOP. If the instruction is executed
in proper sequence – immediately after the first word –
the data in the second word is accessed and used by
EXAMPLE 5-4:
2004 Microchip Technology Inc.
CASE 1:
Object Code
CASE 2:
Object Code
0110 0110 0000 0000
1100 0001 0010 0011
1111 0100 0101 0110
0010 0100 0000 0000
0110 0110 0000 0000
1100 0001 0010 0011
1111 0100 0101 0110
0010 0100 0000 0000
MOVSS
TWO-WORD INSTRUCTIONS
and SUBULNK. In all cases, the
TWO-WORD INSTRUCTIONS
Source Code
TSTFSZ
MOVFF
Source Code
TSTFSZ
ADDWF
ADDWF
MOVFF
REG1
REG1, REG2 ; No, skip this word
REG3
REG1
REG1, REG2 ; Yes, execute this word
REG3
Preliminary
; is RAM location 0?
; Execute this word as a NOP
; continue code
; is RAM location 0?
; 2nd word of instruction
; continue code
the instruction sequence. If the first word is skipped for
some reason and the second word is executed by itself,
a NOP is executed instead. This is necessary for cases
when the two-word instruction is preceded by a condi-
tional instruction that changes the PC. Example 5-4
shows how this works.
PIC18F8722 FAMILY
Note:
See Section 5.6 “PIC18 Instruction
Execution and the Extended Instruc-
tion Set” for information on two-word
instructions in the extended instruction set.
DS39646B-page 71
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