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參數資料
| 型號： | UPD77016 |
| 廠商： | NEC Corp. |
| 元件分類： | 數字信號處理 |
| 英文描述： | 16 bits, Fixed-point Digital Signal Processor |
| 中文描述： | 16位定點數字信號處理器 |
| 文件頁數： | 19/56頁 |
| 文件大?。?/td> | 250K |
| 代理商： | UPD77016 |
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μ
PD77016
19
2.4.1 Instruction RAM Outline
The
μ
PD77016 has an instruction RAM (1.5 words
×
32 bits). A system vector area is assigned to 64 words
of the instruction RAM. Internal RAM is initialized and rewritten by boot program.
Additionally external memory expansion is available as the
μ
PD77016 has interface with the external
instruction memory. When RAM is used as the external memory, it can be initialized and rewritten by boot
program.
Boot up ROM contains the program loading instruction code to internal and external instruction RAM.
When the external instruction memory area is accessed, instruction cycle can be 2 or more by wait function.
2.4.2 Data Memory Outline
The
μ
PD77016 has two data memory areas (64 words
×
16 bits each) in X and Y memory areas.
Each memory areas consists of 2K words
×
16 bits data RAM. Additionally, data memory expansion is
available as the
μ
PD77016 has interface with the external data memory.
Each data memory area includes on-chip peripheral area which consists of 64 words.
When the external data memory area is accessed, instruction cycle can be 2 or more by wait function.
2.4.3 Data Memory Addressing
There are following two types of data memory addressing.
Direct addressing
The address is specified in the instruction field.
Indirect addressing
The address is specified by the data pointer (DP). DP can get a bit reverse before addressing. It can update
the DP value after accessing data memory.
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