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PIC18F25J10-I/SS 参数 Datasheet PDF下载

PIC18F25J10-I/SS图片预览
型号: PIC18F25J10-I/SS
PDF下载: 下载PDF文件 查看货源
内容描述: 28 /40/ 44引脚高性能, RISC微控制器 [28/40/44-Pin High-Performance, RISC Microcontrollers]
分类和应用: 微控制器和处理器外围集成电路光电二极管PC时钟
文件页数/大小: 368 页 / 5652 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC18F45J10 FAMILY  
6.1.1  
HARD MEMORY VECTORS  
6.1.2  
FLASH CONFIGURATION WORDS  
All PIC18 devices have a total of three hard-coded  
return vectors in their program memory space. The  
Reset vector address is the default value to which the  
program counter returns on all device Resets; it is  
located at 0000h.  
Because PIC18F45J10 family devices do not have  
persistent configuration memory, the top four words of  
on-chip program memory are reserved for configuration  
information. On Reset, the configuration information is  
copied into the Configuration registers.  
PIC18 devices also have two interrupt vector  
addresses for the handling of high-priority and low-  
priority interrupts. The high-priority interrupt vector is  
located at 0008h and the low-priority interrupt vector is  
at 0018h. Their locations in relation to the program  
memory map are shown in Figure 6-2.  
The Configuration Words are stored in their program  
memory location in numerical order, starting with the  
lower byte of CONFIG1 at the lowest address and end-  
ing with the upper byte of CONFIG4. For these devices,  
only Configuration Words, CONFIG1 through  
CONFIG3, are used; CONFIG4 is reserved. The actual  
addresses of the Flash Configuration Word for devices  
in the PIC18F45J10 family are shown in Table 6-1.  
Their location in the memory map is shown with the  
other memory vectors in Figure 6-2.  
FIGURE 6-2:  
HARD VECTOR AND  
CONFIGURATION WORD  
LOCATIONS FOR  
PIC18F45J10 FAMILY  
DEVICES  
Additional details on the device Configuration Words  
are provided in Section 21.1 “Configuration Bits”.  
TABLE 6-1:  
FLASH CONFIGURATION  
WORD FOR PIC18F45J10  
FAMILY DEVICES  
0000h  
Reset Vector  
High-Priority Interrupt Vector  
Low-Priority Interrupt Vector  
0008h  
0018h  
Program  
Memory  
(Kbytes)  
Configuration  
Word  
Addresses  
Device  
PIC18F24J10  
PIC18F44J10  
PIC18F25J10  
PIC18F45J10  
16  
32  
3FF8h to 3FFFh  
7FF8h to 7FFFh  
On-Chip  
Program Memory  
(Top of Memory-7)  
(Top of Memory)  
Flash Configuration Words  
Read ‘0’  
1FFFFFh  
Legend:  
(Top of Memory) represents upper boundary  
of on-chip program memory space (see  
Figure 6-1 for device-specific values).  
Shaded area represents unimplemented  
memory. Areas are not shown to scale.  
DS39682E-page 52  
© 2009 Microchip Technology Inc.  
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