参数资料
| 型号： | DM163025 |
| 厂商： | Microchip Technology |
| 文件页数： | 30/48页 |
| 文件大小： | 0K |
| 描述： | PIC DEM FULL SPEED USB DEMO BRD |
| 标准包装： | 1 |
| 主要目的： | 接口，USB 2.0 主机/控制器 |
| 嵌入式： | 是，MCU，8 位 |
| 已用 IC / 零件： | PIC18F2455/2550/4455/4550 |
| 主要属性： | 全速（12Mbps） |
| 次要属性： | MPLAB ICE 2000/4000 仿真器接口，温度传感器，扩展和 PICtail 接头 |
| 已供物品： | 板，缆线，CD |
| 产品目录页面： | 659 (CN2011-ZH PDF) |
| 相关产品： | PIC18F4458T-I/PT-ND - IC PIC MCU FLASH 12KX16 44TQFP PIC18F4458T-I/ML-ND - IC PIC MCU FLASH 12KX16 44QFN PIC18F2458T-I/SO-ND - IC PIC MCU FLASH 12KX16 28SOIC PIC18F4458-I/PT-ND - IC PIC MCU FLASH 12KX16 44TQFP PIC18F2458-I/SP-ND - IC PIC MCU FLASH 12KX16 28SDIP PIC18F2458-I/SO-ND - IC PIC MCU FLASH 12KX16 28SOIC PIC18F4458-I/ML-ND - IC PIC MCU FLASH 12KX16 44QFN PIC18F4458-I/P-ND - IC PIC MCU FLASH 12KX16 40DIP PIC18F4553-I/PT-ND - IC PIC MCU FLASH 16KX16 44TQFP PIC18F4553-I/P-ND - IC PIC MCU FLASH 16KX16 40-DIP 更多... |
| 其它名称： | Q2086254 |
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PICDEM ? FS USB User’s Guide
FIGURE 3-6:
CONFIGURATION CONFLICT WARNING DIALOG WITH
TYPICAL DIAGNOSTIC MESSAGE
When a file is loaded, either from a device or a file, the bootloader demo software also
parses the file to determine if code is available for the different memory areas. If a
device is programmed with that file, only those memory areas with code present are
programmed; the other memory areas are left unchanged. For example, a hex file that
is missing data for the data EEPROM or Configuration Words will only program the
target device’s program memory and user ID spaces; the existing configuration and
stored EEPROM information will be preserved.
3.5.5
Writing Application Code with the Bootloader
The bootloader operates as a separate entity, which means that an application can be
developed with very little concern about what the bootloader is doing. This is as it
should be; the bootloader should be dormant code until an event initiates its operation.
Ideally, bootloader code should never be running during an application’s intended
normal operation.
When developing an application with a resident bootloader, some basic principles must
be kept in mind:
3.5.5.1
WRITING IN ASSEMBLY
When writing in assembly, the boot block and new vectors must be considered. For
modular code, this is usually just a matter of changing the linker script file for the
project. An example is shown in Example 3-1. If an absolute address is assigned to a
code section, the address must point somewhere above the boot block.
For those who write absolute assembly, all that is necessary is to remember that the
new Reset vector is at 800h, and the interrupt vectors are at 808h and 818h. Except for
the bootloader, no code should reside in the boot block area.
DS51526B-page 26
? 2008 Microchip Technology Inc.
相关PDF资料 |
PDF描述 |
|---|---|
| DM163028 | BOARD DEMO PICDEM LCD |
| DM163029 | BOARD PICDEM FOR MECHATRONICS |
| DM164130-3 | BOARD DEMO FOR PIC16F/PIC18F |
| DM183020 | BOARD DEMO PIC18FXX20 64/80TQFP |
| DM183021 | BOARD DEV PICDEM MC LV |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DM163025-1 | 功能描述:开发板和工具包 - PIC / DSPIC USB 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: |
| DM163026 | 功能描述:开发板和工具包 - PIC / DSPIC L-Pow Sol 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: |
| DM163027-2 | 功能描述:Zigbee/802.15.4开发工具 PICDEM Z ZIGBEE BRD RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:EM35x 频率:2.4 GHz 接口类型:USB 工作电源电压: |
| DM163027-4 | 功能描述:Zigbee/802.15.4开发工具 PICDEM Z ZIGBEE BRD RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:EM35x 频率:2.4 GHz 接口类型:USB 工作电源电压: |
| DM163027-5 | 功能描述:Zigbee/802.15.4开发工具 PICDEM Z MRF24J40 2.4 GhZ Dev Kit RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:EM35x 频率:2.4 GHz 接口类型:USB 工作电源电压: |
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