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參數(shù)資料
| 型號： | μPD784046 |
| 廠商： | NEC Corp. |
| 英文描述： | 16 Bit Single Chip Microcontrollers(16位單片微控制器) |
| 中文描述： | 16位單片機微控制器（16位單片微控制器） |
| 文件頁數(shù)： | 17/62頁 |
| 文件大?。?/td> | 366K |
| 代理商： | ΜPD784046 |
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m
PD784044,
784046
17
6. CPU ARCHITECTURE
6.1 Memory Space
A 1M-byte memory space can be accessed. The mapping of the internal data area (special function registers
and internal RAM) can be selected by using the LOCATION instruction. The LOCATION instruction must be
always executed after the reset signal has been deasserted, and must not be used more than once.
(1) When LOCATION 0 instruction is executed
Internal memory
The internal data area and internal ROM area are as follows:
Product Name
Internal Data Area
Internal ROM Area
m
PD784044
0FB00H-0FFFFH
00000H-07FFFH
m
PD784046
0F700H-0FFFFH
00000H-0F5FFH
Caution
0F600H to 0FFFFH of the on-chip ROM (00000H to 0FFFFH) of the
m
PD784046 cannot be
used as ROM in execution of the LOCATION 0 instruction (refer to Figure 6-2).
External memory
The external memory is accessed in the external memory expansion mode.
(2) When LOCATION 0FH instruction is executed
Internal memory
The internal data area and internal ROM area are as follows:
Product Name
Internal Data Area
Internal ROM Area
m
PD784044
FFB00H-FFFFFH
00000H-07FFFH
m
PD784046
FF700H-FFFFFH
00000H-0FFFFH
External memory
The external memory is accessed in the external memory expansion mode.
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