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參數(shù)資料
| 型號： | MC68HC05J1 |
| 廠商： | Motorola, Inc. |
| 英文描述： | HCMOS MICROCONTROLLER UNIT |
| 中文描述： | HCMOS微控制器 |
| 文件頁數(shù)： | 47/82頁 |
| 文件大?。?/td> | 327K |
| 代理商： | MC68HC05J1 |
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MC68HC705J2
Rev. 2
BOOTLOADER MODE
MOTOROLA
8-1
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SECTION 8
BOOTLOADER MODE
This section describes how to use the bootloader ROM to download to the on-chip
EPROM.
8.1 Bootloader ROM
The bootloader ROM, located at addresses $0F01–$0FEF, contains routines for
copying to the on-chip EPROM from an external EPROM or from a personal
computer.
In MC68HC705J2 native mode, the bootloader copies to the 2 Kbyte space located
at EPROM addresses $0700–$0EFF, the MOR byte at location $0F00, and the user
vector addresses $0FF0–$0FFF. In MC68HC05J1 emulation mode, the bootloader
copies to the 1 Kbyte space located at EPROM addresses $0300–$06FF, the MOR
byte at location $0700, and the user vector addresses $07F0–$07FF. The addresses
of the copied code must correspond to the internal addresses to which the code is
copied. The bootloader ignores all other addresses.
The COP timer is automatically disabled in bootloader mode.
8.1.1 External EPROM Downloading
Figure 8-1
shows the circuit used to download to the on-chip EPROM from a 2764
EPROM. The bootloader circuit includes an external 12-bit counter to address the
EPROM containing the code to be copied.
Operation is fastest when unused external EPROM addresses contain $00.
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| MC68HC05P8EVS | HCMOS MICROCONTROLLER UNIT |
| MC68HC705J2 | HCMOS MICROCONTROLLER UNIT |
| MC68HC705J2CP | HCMOS MICROCONTROLLER UNIT |
| MC68HC705J2DW | HCMOS MICROCONTROLLER UNIT |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC05J1A | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers |
| MC68HC05J1ACDW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers |
| MC68HC05J1ACP | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers |
| MC68HC05J1ADW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers |
| MC68HC05J1AP | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers |
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