- 您现在的位置：买卖IC网 > Sheet目录321 > DM164120-1 (Microchip Technology)BOARD DEMO PICKIT 2 LP COUNT
Low Pin Count Demo Board User’s Guide
Increment or Decrement a File Register
The INCFSZ and DECFSZ instructions add or subtract one from the contents of
the file register and skips the next instruction when the result is zero. One use is
CLRF
DECFSZ
EXAMPLE 3-3:
Short Loop
CLRF
Loop
DECFSZ
GOTO
Long Loop
CLRF
CLRF
Loop
DECFSZ
GOTO
DECFSZ
GOTO
Clears the counter location.
Decrements the location, and if the result is zero, the next
instruction is skipped.
DELAY LOOP
Delay
Delay,f
Loop
Delay1
Delay2
Delay1,f
Loop
Delay2,f
Loop
The GOTO Loop (in Example 3-3) backs up and does it again. This loop takes 3
instruction times; one for the decrement and two for the GOTO (see note) and the
counter will force it to go around 256 times, which takes it a total of 768 instruction times
(768 μ s) to execute.
Even that is still too fast for the eye to see. It can be slowed down even more by adding
a second loop around this one.
The inner loop still takes 768 μ s plus 3 for the outer loop, but now it’s executed another
256 times, 771 * 256 = 197376 μ s = 0.197s.
Note:
GOTO instructions take two instructions due to the pipelined design of the
processor. The processor fetches the next instruction while executing the
current instruction. When a program branch occurs, the fetched instruction
is not executed.
Open Blink.asm and build the lesson. Next, import the hex file into the PICkit 2 and
program the device. Note the LED now flashes at about a 2 Hz rate.
DS51556A-page 16
? 2005 Microchip Technology Inc.
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
DM164120-3
BOARD DEMO PICKIT2 28-PIN
DM164120-5
BOARD DEMO PICKIT 2 64/80-PIN
DM164123
KIT MANAGEMENT SYSTEM PICDEM
DM180021
KIT STARTER MPLAB FOR PIC18F MCU
DM183022
BOARD DEMO PIC18FXX22 64/80TQFP
DM183032
BOARD EXPLORER PICDEM PIC18
DM240001
BOARD DEMO PIC24/DSPIC33/PIC32
DM240002
BOARD DEV EXPLORER 16 44-PIN
相关代理商/技术参数
DM164120-1
制造商:Microchip Technology Inc 功能描述:DEVELOPMENT TOOLS - PICKIT 2 LOW PIN COU
DM164120-2
功能描述:开发板和工具包 - PIC / DSPIC PICkit 2 44-Pin Count Demo Brd RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压:
DM164120-3
功能描述:开发板和工具包 - PIC / DSPIC PICkit 2 Count Demo Board RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压:
DM164120-4
功能描述:开发板和工具包 - PIC / DSPIC PICkit 2 1 Dem Board RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压:
DM164120-4
制造商:Microchip Technology Inc 功能描述:PICkit 2 18-Pin Demo Board
DM164120-4/16F1827/PG164130
制造商:Microchip Technology Inc 功能描述:PICKIT PIC16F648A DEMO BOARD 制造商:Microchip Technology Inc 功能描述:KIT STARTER 18PIN F1 ENHANCED CORE 制造商:Microchip Technology Inc 功能描述:PICKIT, PIC16F648A, DEMO BOARD 制造商:Microchip Technology Inc 功能描述:PICKIT, PIC16F648A, 18 PIN, DEMO BOARD; Silicon Manufacturer:Microchip; Core Architecture:PIC; Core Sub-Architecture:PIC16; Silicon Core Number:PIC16F; Silicon Family Name:PIC16F18xx; Kit Contents:Demo Board, 2x Bare PCB Boards
DM164120-5
功能描述:开发板和工具包 - PIC / DSPIC PICkit 2 64 demoBoard RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压:
DM164123
功能描述:开发板和工具包 - PIC / DSPIC PICDEM Sys Mgmt Board RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: