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參數(shù)資料
| 型號： | TS80C51RA2-LCE |
| 廠商： | International Rectifier |
| 英文描述： | High Performance 8-bit Microcontroller |
| 中文描述： | 高性能8位微控制器 |
| 文件頁數(shù)： | 15/85頁 |
| 文件大?。?/td> | 762K |
| 代理商： | TS80C51RA2-LCE |
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15
4188E–8051–08/06
AT/TS8xC51Rx2
5.4
Dual Data Pointer Register
The additional data pointer can be used to speed up code execution and reduce code size in a
number of ways.
The dual DPTR structure is a way by which the chip will specify the address of an external data
memory location. There are two 16-bit DPTR registers that address the external memory, and a
single bit called DPS = AUXR1/bit0 (
Table 5-3
) that allows the program code to switch between
them (Refer to Figure 5-3).
Figure 5-3.
Use of Dual Pointer
Table 5-3.
AUXR1: Auxiliary Register 1
External Data Memory
AUXR1(A2H)
DPS
DPH(83H) DPL(82H)
0
7
DPTR0
DPTR1
AUXR1
Address 0A2H
-
-
-
-
GF3
-
-
DPS
Reset value
X
X
X
X
0
X
X
0
Symbol
Function
-
Not implemented, reserved for future use
(1)
1.
User software should not write 1s to reserved bits. These bits may be used in future 8051 family
products to invoke new feature. In that case, the reset value of the new bit will be 0, and its
active value will be 1. The value read from a reserved bit is indeterminate.
GF3 will not be available on first version of the RC devices.
DPS
Data Pointer Selection.
DPS
Operating Mode
0
DPTR0 Selected
1
DPTR1 Selected
GF3
This bit is a general purpose user flag
(2)
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TS80C51RA2-LIE | High Performance 8-bit Microcontroller |
| TS80C51RA2-MCB | High Performance 8-bit Microcontroller |
| TS80C51RA2-MCE | High Performance 8-bit Microcontroller |
| TS80C51RA2-MIB | High Performance 8-bit Microcontroller |
| TS80C51RA2-MIE | High Performance 8-bit Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS80C51RA2-LCEB | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
| TS80C51RA2-LCED | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
| TS80C51RA2-LCER | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
| TS80C51RA2-LCJB | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
| TS80C51RA2-LCJD | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontrollers |
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