參數(shù)資料
型號： V30MZ
英文描述： V30MZ(TM) Hardware (Preliminary) | User＇s Manual[01/2002]
中文描述： V30MZ（TM）硬件（初步）|用戶手冊[01/2002]
文件頁數(shù)： 31/89頁
文件大?。?/td> 418K
代理商： V30MZ
CHAPTER 3 CPU FUNCTIONS
31
3.2 Address Space
3.2.1 Memory space
The V30MZ uses 20-bit address information and can access 1 M bytes (512 K words) of memory.
Figure 3-2 shows the memory map. The 1 K byte from 00000H to 003FFH is allocated to the interrupt vector
table. However, the table area that is not used by the system can be used for other purposes.
The start address after a reset is FFFF0H. The 12 bytes from FFFF0H to FFFFBH are automatically used for a
reset start, etc., and cannot be used for other purposes. The 4 bytes from FFFFCH to FFFFFH are also reserved for
future use and are not available for users.
Figure 3-2. Memory Map
Reserved area
FFFFFH
FFFFCH
FFFFBH
FFFF0H
FFFEFH
Area for general use
00400H
003FFH
Interrupt vector table
00000H
Refer to
Figure 5-1. Interrupt
Vector Table Configuration
Dedicated area
The elements stored in the memory area include operation codes, interrupt start addresses, stack data, general
variables, and consist of two kinds; byte units and word units.
Addresses generated by an instruction for these elements can be even (A0 = 0) or odd (A0 = 1). Word data in the
V30MZ is designed to be accessible for both even and odd addresses. Both even and odd addresses are possible
for generation of an instruction. For the access method, refer to
Section
4.1 Interface between V30MZ and
Memory
.
Table 3-1 shows the address and data configuration of each memory element.
Table 3-1. Address and Data Configuration of Each Memory Element
Memory Element
Address
Data Configuration
Operation code
Even/odd
1 to 6 bytes
Interrupt vector table
Even
2 words/vector
Stack
Even/odd
Word
General variable
Even/odd
Byte/word/double word
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