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參數資料
| 型號： | ST622XC-KIT |
| 英文描述： | STARTER KIT DATASHEET FOR ST620X. ST621X AND ST622X |
| 中文描述： | 入門套件部件的ST620X。 ST621X及ST622X |
| 文件頁數： | 7/84頁 |
| 文件大?。?/td> | 969K |
| 代理商： | ST622XC-KIT |
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ST62T28C/E28C
1.3 MEMORY MAP
1.3.1 Introduction
The MCU operates in three separate memory
spaces: Program space, Data space, and Stack
space. Operation in these three memory spaces is
described in the following paragraphs.
Briefly, Program space contains user program
code in Program memory and user vectors; Data
space contains user data in RAM and in Program
memory, and Stack space accommodates six lev-
els of stack for subroutine and interrupt service
routine nesting.
1.3.2 Program Space
Program Space comprises the instructions to be
executed, the data required for immediate ad-
dressing mode instructions, the reserved factory
test area and the user vectors. Program Space is
addressed via the 12-bit Program Counter register
(PC register).
Program Space is organised in 4K pages. 4 of
them are addressed in the 000h-7FFh locations of
the Program Space by the Program Counter and
by writing the appropriate code in the Program
ROM Page Register (PRPR register). A common
(STATIC) 2K page is available all the time for inter-
rupt vectors and common subroutines, independ-
ently of the PRPR register content. This “STATIC”
page is directly addressed in the 0800h-0FFFh by
the MSB of the Program Counter register PC 11.
Note this page can also be addressed in the 000-
7FFh range. It is two different ways of addressing
the same physical memory.
Jump from a dynamic page to another dynamic
page is achieved by jumping back to the static
page, changing contents of PRPR and then jump-
ing to the new dynamic page.
Figure 3. 8Kbytes Program Space Addressing
Figure 4. Memory Addressing Diagram
PC
SPACE
000h
7FFh
800h
FFFh
0000h
1FFFh
Page 0
Page 1
Static
Page
Page 2
Page 1
Static
Page
ROM SPACE
Page 3
PROGRAM SPACE
PROGRAM
MEMORY
INTERRUPT &
RESET VECTORS
ACCUMULATOR
DATA RAM
BANK SELECT
WINDOW SELECT
RAM
X REGISTER
Y REGISTER
V REGISTER
W REGISTER
DATA READ-ONLY
MEMORY
WINDOW
RAM / EEPROM
BANKING AREA
000h
03Fh
040h
07Fh
080h
081h
082h
083h
084h
0C0h
0FFh
0-63
DATA SPACE
0000h
0FF0h
0FFFh
MEMORY
DATA READ-ONLY
VR01568
7
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相關代理商/技術參數 |
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| ST622XC-KIT/110 | 功能描述:開發(fā)板和工具包 - 其他處理器 ST622X Starter Kit RoHS:否 制造商:Freescale Semiconductor 產品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
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| ST6230BB1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, 16-BIT AUTO-RELOAD TIMER, EEPROM, SPI AND UART |
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