
ML610471/472/473/Q471/Q472/Q473 User's Manual
Chapter 2 CPU and Memory Space
2-1
2. CPU and Memory Space
2.1 Overview
This LSI includes 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 one segment and has 8-Kbyte (4-Kword) capacity.
Figure 2-1 shows the configuration of the program memory space.
PC
0000H
00FFH
Vector Table Area
or
Program Code
ROM Window Area
0100H
Program Code Area
or
ROM Window Area
1F00H
1FFFH
Test Data Area
8bit
Figure 2-1 Configuration of Program Memory Space
Note:
・
The 256 bytes (128 words) from 1F00H to 1FFFH are the test data area.
・
The test data area is rewritable but cannot be used as the program code area.
・
Set “0FFH” data (BRK instruction) in the unused area of the program memory space.
Содержание ML610471
Страница 12: ...Chapter 1 Overview...
Страница 38: ...Chapter 2 CPU and Memory Space...
Страница 44: ...Chapter 3 Reset Function...
Страница 48: ...Chapter 4 MCU Control Function...
Страница 62: ...Chapter 5 Interrupts...
Страница 82: ...Chapter 6 Clock Generation Circuit...
Страница 94: ...Chapter 7 Time Base Counter...
Страница 105: ...Chapter 8 Capture...
Страница 114: ...Chapter 9 Timer...
Страница 133: ...Chapter 10 Watchdog Timer...
Страница 141: ...Chapter 11 UART...
Страница 164: ...Chapter 12 Port 0...
Страница 173: ...Chapter 13 Port 2...
Страница 180: ...Chapter 14 Port 3...
Страница 188: ...Chapter 15 Port 4...
Страница 199: ...Chapter 16 Port 6...
Страница 205: ...Chapter 17 RC Oscillation Type A D Converter...
Страница 225: ...Chapter 18 LCD Drivers...
Страница 243: ...Chapter 19 Power Supply Circuit...
Страница 245: ...Chapter 20 uEASE Flash Writer System...
Страница 249: ...Chapter 21 Software Development...
Страница 258: ...Appendixes...
Страница 280: ...Revision History...