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| 型号： | MCP2510T-I/ST |
| 厂商： | Microchip Technology |
| 文件页数： | 64/80页 |
| 文件大小： | 0K |
| 描述： | IC CAN CONTROLLER W/SPI 20-TSSOP |
| 标准包装： | 2,500 |
| 控制器类型： | CAN 接口 |
| 接口： | SPI |
| 电源电压： | 3 V ~ 5.5 V |
| 电流 - 电源： | 10mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 带卷 (TR) |
| 配用： | DV251001-ND - KIT DEVELOPMENT CAN MCP2510 |
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2009 Microchip Technology Inc.
DS39637D-page 67
PIC18F2480/2580/4480/4580
6.0
MEMORY ORGANIZATION
There are three types of memory in PIC18 Enhanced
microcontroller devices:
Program Memory
Data RAM
Data EEPROM
As Harvard architecture devices, the data and program
memories use separate busses; this allows for con-
current access of the two memory spaces. The data
EEPROM, for practical purposes, can be regarded as
a peripheral device, since it is addressed and accessed
through a set of control registers.
Additional detailed information on the operation of the
Flash program memory is provided in Section 7.0
“Flash Program Memory”. Data EEPROM is dis-
cussed separately in Section 8.0 “Data EEPROM
6.1
Program Memory Organization
PIC18 microcontrollers implement a 21-bit program
counter, which is capable of addressing a 2-Mbyte
program memory space. Accessing a location between
upper boundary of the physically implemented memory
and the 2-Mbyte address will return all ‘0’s (a NOP
instruction).
The PIC18F2480 and PIC18F4480 each have
16 Kbytes of Flash memory and can store up to
8,192 single-word instructions. The PIC18F2580 and
PIC18F4580 each have 32 Kbytes of Flash memory
and can store up to 16,384 single-word instructions.
PIC18 devices have two interrupt vectors. The Reset
vector address is at 0000h and the interrupt vector
addresses are at 0008h and 0018h.
The program memory maps for PIC18FX480 and
PIC18FX580 devices are shown in Figure 6-1.
FIGURE 6-1:
PROGRAM MEMORY MAP AND STACK FOR
PIC18F2480/2580/4480/4580 DEVICES
PC<20:0>
Stack Level 1
Stack Level 31
Reset Vector
Low-Priority Interrupt Vector
CALL,RCALL,RETURN
RETFIE,RETLW
21
0000h
0018h
On-Chip
Program Memory
High-Priority Interrupt Vector 0008h
User
Mem
o
ry
S
pac
e
1FFFFFh
4000h
3FFFh
Read ‘0’
200000h
PC<20:0>
Stack Level 1
Stack Level 31
Reset Vector
Low-Priority Interrupt Vector
CALL,RCALL,RETURN
RETFIE,RETLW
21
0000h
0018h
80000h
7FFFh
On-Chip
Program Memory
High-Priority Interrupt Vector 0008h
Us
er
M
e
mo
ry
S
pace
Read ‘0’
1FFFFFh
200000h
PIC18FX480
PIC18FX580
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