參數(shù)資料
型號: mPD789326GB-xxx-8ET
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述: 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存
文件頁數(shù): 15/96頁
文件大?。?/td> 482K
代理商: MPD789326GB-XXX-8ET
Preliminary Product Information U14673EJ1V0PM00
15
μ
PD789322,789324,789326,789327
4.2 Data Memory Addressing
The
μ
PD789322, 789324, 789326, and 789327 are provided with a variety of addressing modes to improve the
operability of the memory. In the area that incorporates data memory (FD00H to FFFFH) in particular, specific
addressing modes that correspond to the particular functions of an area, such as the special function registers
(SFRs), are available. Figure 4-2 shows the data memory addressing modes.
Figure 4-2. Data Memory Addressing Modes
Special function registers (SFRs)
256
×
8 bits
Internal high-speed RAM
LCD display RAM
24
×
8 bits
F F F F H
0 0 0 0 H
Direct addressing
Register indirect
addressing
Based addressing
F F 0 0 H
F E F F H
F F 2 0 H
F F 1 F H
F E 2 0 H
F E 1 F H
SFR addressing
Short direct
addressing
mmmmH
mmmmH
1
F A 1 8 H
F A 1 7 H
Reserved
F A 0 0 H
F 9 F F H
Reserved
Internal ROM
Note
Note
n n n n H
+
1
n n n n H
Note
The internal ROM capacity and internal high-speed RAM capacity depend on the products (see the next
table).
Relevant Product Name
Internal ROM Last Address
nnnnH
Internal High-Speed RAM Start Address
mmmmH
μ
PD789322
0FFFH
μ
PD789324
1FFFH
FE00H
μ
PD789326
3FFFH
μ
PD789327
5FFFH
FD00H
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