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參數(shù)資料
| 型號： | ADUC834BS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MicroConverter, Dual 16-/24- Bit ADCs with Embedded 62KB FLASH MCU |
| 中文描述： | 8-BIT, FLASH, 12.58 MHz, MICROCONTROLLER, PQFP52 |
| 封裝： | 14 X 14 MM, MO-022-AC-1, MQFP-52 |
| 文件頁數(shù)： | 53/72頁 |
| 文件大?。?/td> | 1451K |
| 代理商： | ADUC834BS |
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REV.
P
rC (12 March 2002)
ADuC834
–
53
–
PRELIMINARY TECHNICAL DATA
T able X X II. DPCON SFR Bit Designations
Bit
7
6
Name
-
DPT
Description
Reserved for future use
Data Pointer automatic toggle enable
Cleared
by user to disable auto swapping of the DPT R.
Set
in user software to enable automatic toggling of the DPT R after each each MOVX or MOVC
instruction.
Shadow Data Pointer Mode
T hese two bits enable extra modes of the shadow data pointer operation allowing for more compact
and more efficient code size and execution.
m1
m0
Behaviour of the Shadow Data Pointer
0
0
8052 Behaviour
0
1
DPT R is post incremented after a MOVX or a MOVC instruction
1
0
DPT R is post decremented after a MOVX or MOVC instruction
1
1
DPT R LSB is toggled after a MOVX or MOVC instruction
(T his instruction can be useful for moving 8 bit blocks to/from 16-bit devices)
Main Data Pointer Mode
T hese two bits enable extra modes of the main data pointer operation allowing for more compact and
more efficient code size and execution.
m1
m0
Behaviour of the Main Data Pointer
0
0
8052 Behaviour
0
1
DPT R is post incremented after a MOVX or a MOVC instruction
1
0
DPT R is post decremented after a MOVX or MOVC instruction
1
1
DPT R LSB is toggled after a MOVX or MOVC instruction
(T his instruction can be useful for moving 8 bit blocks to/from 16-bit devices)
Not implemented to allow the INC DPCON instruction toggle the data pointer
Data Pointer select
Cleared
by user to select the main data pointer. T his means that the contents of this 24 bit register
is placed into the 3 SFRs DPL, DPH and DPP.
Set
by the user to select the shadow data pointer. T his means that the contents of a separate 24 bit
register appears in the 3 SFRs DPL, DPH and DPP.
5
4
DP1m1
DP1m0
3
2
DP0m1
DP0m0
1
0
-
DPSEL
DUAL DAT A POINT E R
T he ADuC834 incorporates two data pointers. T he second
data pointer is a shadow data pointer and is selected via the
data pointer control SFR (DPCON). DPCON also includes
some nice features such as automatic hardware post increment
and post decrement as well as automatic data pointer toggle.
DPCON is described below.
DPCON
SFR Address
Power-On Default Value
Bit Addressable
Data Pointer Control SFR
A7h
00h
No
Note 1: T his is the only place where the main and shadow data
pointers are distinguished. Everywhere else in this datasheet
wherever the DPT R is mentioned, operation on the active
DPT R is implied.
Note 2: Only MOVC/MOVX @DPT R instructions are relevant
above. MOVC/MOVX PC/@Ri instructions will not cause the
DPT R to automatically post increment/decrement etc.
T o illustrate the operation of DPCON, the following code will
copy 256 bytes of code memory at address D000h into X RAM
starting from address 0000h.
T he following piece of code uses 16 bytes and 2054 cycles. T o
perform this on a standard 8051 requires approximately 33
bytes and 7172 cycles (depending on how its implemented).
MOV
MOV
DPTR,#0
DPCON,#55h
; Main DPTR = 0
; Select shadow DPTR
; DPTR1 increment mode,
; DPTR0 increment mode
; DPTR auto toggling ON
MOV
DPTR,#0D000h ; Shadow 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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| ADUC834BSZ | 功能描述:IC ADC DUAL16/24BIT W/MCU 52MQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC8xx 標(biāo)準(zhǔn)包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設(shè)備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| ADUC836 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter, Dual 16-Bit-ADCs with Embedded 62 kB Flash MCU |
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