參數(shù)資料
型號: M34518M4-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP32
封裝: 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32
文件頁數(shù): 89/157頁
文件大小: 1783K
代理商: M34518M4-XXXFP
ML610Q411/ML610Q412/ML610Q415 User’s Manual
Chapter 2
CPU and Memory Space
2 – 1
2.
CPU and Memory Space
2.1
Overview
This LSI includes OKI’s original 8-bit CPU nX-U8/100 and the memory model is “SMALL model” .
For details of the CPU nX-U8/100, see “nX-U8/100 Core Instruction Manual”.
2.2
Program Memory Space
The program memory space is used to store program codes, table data (ROM window), or vector tables.
The program codes have a length of 16 bits and are specified by a 16-bit program counter (PC).
The ROM window area data has a length of 8 bits and can be used as table data.
The vector table, which has 16-bit long data, can be used as reset vectors, hardware interrupt vectors, and software
interrupt vectors.
The program memory space consists of 1 segments and has 16-Kbyte (8-Kword) capacity.
Figure 2-1 shows the configuration of the program memory space.
CSR:PC
Segment0
0:0000H
0:00FFH
Vector Table Area or
Program Code or
ROM Window Area
0:0100H
0:03C00H
0:03BFFH
Program Code
or
ROM Window Area
0:03C00H
0:03DFFH
Test Data Area
Write-able
0:03E00H
0:03FFFH
Test Data Area
0:03FFFH
Test Data Area
Non Write-able
8bit
Figure 2-1
Configuration of Program Memory Space
Notes:
Since test program data is stored in the 1024Byte (512Word) test data area (0:03C00H to 0:03FFFH) of Segment 0,
this area cannot be used as a program code area.
The address “0: 03C00H to 0: 03DFFH” in the test area is write-able and erase-able. Fill the area with “0FFH”. If
data in the area is uncertain or other data (i.e. not 0FFH), operating with the code can not be guranteed.
Set “0FFH” data (BRK instruction) in the unused area of the program memory space.
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