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參數(shù)資料
| 型號： | ADUC848BS62-3 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 10-825944-010 |
| 中文描述： | 8-BIT, FLASH, 12.58 MHz, MICROCONTROLLER, PQFP52 |
| 封裝： | 14 X 14 MM, PLASTIC, MO-112-AC-1, MQFP-52 |
| 文件頁數(shù)： | 67/108頁 |
| 文件大小： | 1109K |
| 代理商： | ADUC848BS62-3 |
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ADuC845/ADuC847/ADuC848
DUAL DATA POINTERS
The parts incorporate two data pointers. The second data
pointer is a shadow data pointer and is selected via the data
pointer control SFR (DPCON). DPCON features automatic
hardware post-increment and post-decrement as well as an
automatic data pointer toggle.
Table 42. DPCON SFR Bit Designations
Bit No.
Name
Description
7
----
Not Implemented. Write Don’t Care.
6
DPT
Data Pointer Automatic Toggle Enable.
Cleared by the user to disable autoswapping of the DPTR.
Set in user software to enable automatic toggling of the DPTR after each MOVX or MOVC instruction.
Shadow Data Pointer Mode. These bits enable extra modes of the shadow data pointer operation, allowing
more compact and more efficient code size and execution.
DP1m1
DP1m0
Behavior of the Shadow Data Pointer
0
0
8052 behavior.
0
1
DPTR is post-incremented after a MOVX or a MOVC instruction.
1
0
DPTR is post-decremented after a MOVX or MOVC instruction.
1
1
DPTR LSB is toggled after a MOVX or MOVC instruction. (This instruction can be useful for
moving 8-bit blocks to/from 16-bit devices.)
Main Data Pointer Mode. These bits enable extra modes of the main data pointer operation, allowing more
compact and more efficient code size and execution.
Rev. A | Page 67 of 108
DPCON—Data Pointer Control SFR
SFR Address:
Power-On Default:
Bit Addressable:
A7H
00H
No
5, 4
DP1m1, DP1m0
DP0m1
0
0
1
1
DP0m0
0
1
0
1
Behavior of the Main Data Pointer
8052 behavior.
DPTR is post-incremented after a MOVX or a MOVC instruction.
DPTR is post-decremented after a MOVX or MOVC instruction.
DPTR LSB is toggled after a MOVX or MOVC instruction. (This instruction is useful for
moving 8-bit blocks to/from 16-bit devices.)
Not Implemented. Write Don’t Care.
Data Pointer Select.
Cleared by the user to select the main data pointer. This means that the contents of this 24-bit register are
placed into the DPL, DPH, and DPP SFRs.
Set by the user to select the shadow data pointer. This means that the contents of a separate 24-bit register
appear in the DPL, DPH, and DPP SFRs.
3, 2
DP0m1, DP0m0
1
0
----
DPSEL
Note the following:
The Dual Data Pointer section is the only place in which
main and shadow data pointers are distinguished.
Whenever the DPTR is mentioned elsewhere in this data
sheet, active DPTR is implied.
Only the MOVC/MOVX @DPTR instructions
automatically post-increment and post-decrement the
DPTR. Other MOVC/MOVX instructions, such as MOVC
PC or MOVC @Ri, do not cause the DPTR to automatically
post-increment and post-decrement.
To illustrate the operation of DPCON, the following code copies
256 bytes of code memory at Address D000H into XRAM,
starting from Address 0000H.
MOV DPTR,#0 ;Main DPTR = 0
MOV DPCON,#55H ;Select shadow DPTR
;DPTR1 increment mode
;DPTR0 increment mode
;DPTR auto toggling ON
MOV DPTR,#0D000H ;DPTR = D000H
MOVELOOP: CLR A
MOVC A,@A+DPTR ;Get data
;Post Inc DPTR
;Swap to Main DPTR(Data)
MOVX @DPTR,A ;Put ACC in XRAM
;Increment main DPTR
;Swap Shadow DPTR(Code)
MOV A, DPL
JNZ MOVELOOP
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADUC848BS62-5 | 制造商:Rochester Electronics LLC 功能描述:8BIT CISC 62KB FLASH 12.85MHZ 5V 52MQFP - Bulk 制造商:Analog Devices 功能描述:IC MICROCONTROLLER |
| ADUC848BS8-3 | 制造商:Analog Devices 功能描述: |
| ADUC848BS8-5 | 制造商:Analog Devices 功能描述:MCU 8-bit ADuC8xx 8052 CISC 62KB Flash 3.3V/5V 52-Pin MQFP 制造商:Analog Devices 功能描述:IC MICROCONTROLLER |
| ADUC848BSZ32-3 | 功能描述:IC MCU FLASH W/16BIT ADC 52MQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC8xx 標準包裝:38 系列:Encore!® XP® 核心處理器:eZ8 芯體尺寸:8-位 速度:5MHz 連通性:IrDA，UART/USART 外圍設備:欠壓檢測/復位，LED，POR，PWM，WDT 輸入/輸出數(shù):16 程序存儲器容量:4KB（4K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 3.6 V 數(shù)據(jù)轉換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 105°C 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 包裝:管件 其它名稱:269-4116Z8F0413SH005EG-ND |
| ADUC848BSZ32-5 | 功能描述:IC MCU FLASH W/16BIT ADC 52MQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC8xx 標準包裝:38 系列:Encore!® XP® 核心處理器:eZ8 芯體尺寸:8-位 速度:5MHz 連通性:IrDA，UART/USART 外圍設備:欠壓檢測/復位，LED，POR，PWM，WDT 輸入/輸出數(shù):16 程序存儲器容量:4KB（4K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 3.6 V 數(shù)據(jù)轉換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 105°C 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 包裝:管件 其它名稱:269-4116Z8F0413SH005EG-ND |
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