ML620Q503/Q504 User's Manual
Chapter 2 CPU and Memory Space
FEUL620Q504 2–2
2.2 Program Memory Space
The program memory space stores program codes or vector tables.
The program codes have a length of 16 bits and are specified by a 16-bit program counter (PC).
The program memory space is configured by 32K words (64Kbytes) as one segment (code segment).
The vector table defines the entry address of the program executed at reset and interrupt and is placed in the
segment 0's 0H to 0FEH.
The program memory space capacity determines the memory model. The ML620Q503 and ML620Q504 having
a program memory space of 64Kbytes supports the small model. For details of memory model, see "nX-U16/100
Core Instruction Manual".
Figures 2-1 show the configuration of the program memory space.
CSR:PC
Code segment 0
0:0000H
Vector table
or
Program code
0:00FFH
0:0100H
Program code
0:7BFFH
0:7C00H
Test data
area
(Rewritable)
0:7DFFH
0:7E00H
Test data
area
(Not rewritable)
0:7FFFH
8bit
(a) ML620Q503 Configuration of Program Memory Space
Code segment 0
0:0000H
Vector table
or
Program code
0:00FFH
0:0100H
Program code
0:0FBFFH
0:0FC00H
Test data
area
(Rewritable)
0:0FDFFH
0:0FE00H
Test data
area
(Not rewritable)
0:0FFFFH
8bit
(b) ML620Q504 Configuration of Program Memory Space
Figure 2-1 Configuration of Program Memory Space
[Note]
• A program code cannot be placed in the test data area (1KB).
When rewriting the content of program memory space, ensure to write "0FFH" in the test data area. If data
in the area is uncertain or other data (i.e. not 0FFH), operating with the code cannot be guaranteed.
• It is recommended that the "0FFH" data (BRK instruction) is set in the unused area of the program memory
space as a fail-safe.
Содержание LAPIS SEMICONDUCTOR ML620Q503
Страница 2: ...ML620Q503 Q504 User s Manual Issue Date Apr 16 2015 FEUL620Q504 01...
Страница 18: ...Chapter 1 Overview...
Страница 32: ...Chapter 2 CPU and Memory Space...
Страница 44: ...Chapter 3 Reset Function...
Страница 50: ...Chapter 4 Power Management...
Страница 70: ...Chapter 5 Interrupts...
Страница 134: ...Chapter 6 Clock Generation Circuit...
Страница 161: ...Chapter 7 Time Base Counter...
Страница 170: ...Chapter 8 Timers...
Страница 183: ...Chapter 9 Function Timer FTM...
Страница 231: ...Chapter 10 Watchdog Timer...
Страница 239: ...Chapter 11 Synchronous Serial Port SSIO...
Страница 251: ...Chapter 12 Synchronous Serial Port with FIFO SSIOF...
Страница 283: ...Chapter 13 UART...
Страница 303: ...Chapter 14 UART with FIFO UARTF...
Страница 327: ...Chapter 15 I2 C Bus Interface...
Страница 344: ...Chapter 16 Port XT...
Страница 350: ...Chapter 17 Port 0...
Страница 361: ...Chapter 18 Port 1...
Страница 368: ...Chapter 19 Port2...
Страница 379: ...Chapter 20 Port 3...
Страница 395: ...Chapter 21 Port 4...
Страница 410: ...Chapter 22 Port 5...
Страница 426: ...Chapter 23 Melody Driver...
Страница 439: ...Chapter 24 RC Oscillation type A D Converter RC ADC...
Страница 462: ...Chapter 25 Successive Approximation Type A D Converter SA ADC...
Страница 479: ...Chapter 26 Analog Comparator...
Страница 489: ...Chapter 27 Flash Memory Control...
Страница 505: ...Chapter 28 Voltage Level Supervisor VLS...
Страница 517: ...Chapter 29 LLD circuit...
Страница 519: ...Chapter 30 On Chip Debug Function...
Страница 522: ...Appendixes...
Страница 552: ...Revision History...