參數(shù)資料
型號: M34518M2-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): 90/157頁
文件大?。?/td> 1783K
代理商: M34518M2-XXXFP
ML610Q411/ML610Q412/ML610Q415 User’s Manual
Chapter 2
CPU and Memory Space
2 – 2
2.3
Data Memory Space
The data memory space of this LSI consists of the ROM window area, 1KByte RAM area and SFR area of Segment 0
and the ROM reference areas of the Segment 1 and Segment 8.
The data memory stores 8-bit data and is specified by 20 bits consisting of higher 4 bits as DSR and lower 16 bits as
addressing specified by each instruction.
Figure 2-2 shows the configuration of the data memory space.
DSR: Data address
Segment 0
DSR: Data
address
Segment 8
0:0000H
ROM Window
Area
8:0000H
ROM Reference
Area
0:03E00H
0:03FFFH
Non Access-able
Area
8:03E00H
8:03FFFH
Non Access-able
Area
Unused Area
0:0DFFFH
Unused Area
0:0E000H
0:0E3FFH
RAM Area
1KByte
0:0E400H
Unused Area
0:0F000H
0:0FFFFH
SFR Area
8:0FFFFH
8bit
Figure 2-2
Configuration of Data Memory Space
Notes:
The contents of the 1-Kbyte RAM area are undefined at system reset. Initialize this area by software.
The contents of Segment 0 of the program memory space is read from the ROM reference area of Segment 8.
2.4
Instruction Length
The length of a instruction is 16 bits.
2.5
Data Type
The data types supported include byte (8 bits) and word (16 bits).
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