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參數(shù)資料
| 型號(hào)： | UPD77016 |
| 廠商： | NEC Corp. |
| 元件分類： | 數(shù)字信號(hào)處理 |
| 英文描述： | 16 bits, Fixed-point Digital Signal Processor |
| 中文描述： | 16位定點(diǎn)數(shù)字信號(hào)處理器 |
| 文件頁數(shù)： | 18/56頁 |
| 文件大?。?/td> | 250K |
| 代理商： | UPD77016 |
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μ
PD77016
18
2.4 Memory
The
μ
PD77016 has one instruction memory area (64K words
×
32 bits) and two data memory areas (64K words
×
16 bits each). It adopts Harvard-type architecture, with instruction memory area and data memory areas
separated.
The
μ
PD77016 has 2 sets of data addressing units, which are dedicated for addressing data memory area.
Each addressing unit consists of four data pointers, four index registers, a modulo register and addressing ALU.
Memory areas are shown below.
X memory area addresses are specified by DP0 to DP3, and Y memory area addresses are specified by DP4
to DP7. After memory access, DPn (with the same subscript), can be modified by DNn value. Modulo operation
is performed with DMX for DP0 to DP3, with DMY for DP4 to DP7.
Caution
When any data is accessed or stored to system address, normal operation of the
μ
PD77016 is
not assured.
0xFFFF
0x4000
0x3FFF
0x3840
0x383F
0x3800
0x37FF
0x0800
0x07FF
External Data Memory
(48 K words)
System
Peripheral (64 words)
System
Data RAM (2 K words)
0xFFFF
0x4000
0x3FFF
0x0800
0x07FF
0x0240
0x023F
0x0200
0x01FF
0x0100
0x00FF
0x0000
Internal Instruction RAM (1.5 K words)
System
Vector (64 words)
System
Bootup ROM (256 words)
0x0000
External Instruction Memory
(48 K words)
Data Memory Area (X/Y Memory)
Instruction Memory Area
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