參數(shù)資料
型號(hào): ADUC831BSZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 26/76頁(yè)
文件大?。?/td> 0K
描述: IC ADC/DAC 12BIT W/MCU 52-MQFP
產(chǎn)品培訓(xùn)模塊: Process Control
標(biāo)準(zhǔn)包裝: 1
系列: MicroConverter® ADuC8xx
核心處理器: 8052
芯體尺寸: 8-位
速度: 16MHz
連通性: EBI/EMI,I²C,SPI,UART/USART
外圍設(shè)備: PSM,溫度傳感器,WDT
輸入/輸出數(shù): 34
程序存儲(chǔ)器容量: 62KB(62K x 8)
程序存儲(chǔ)器類(lèi)型: 閃存
EEPROM 大?。?/td> 4K x 8
RAM 容量: 2.25K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x12b,D/A 2x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 52-QFP
包裝: 托盤(pán)
產(chǎn)品目錄頁(yè)面: 738 (CN2011-ZH PDF)
配用: EVAL-ADUC831QSZ-ND - KIT DEV FOR ADUC831 QUICK START
REV. 0
–32–
ADuC831
USER INTERFACE TO OTHER ON-CHIP ADuC831
PERIPHERALS
The following section gives a brief overview of the various
peripherals also available on-chip. A summary of the SFRs
used to control and configure these peripherals is also given.
DAC
The ADuC831 incorporates two 12-bit, voltage output DACs
on-chip. Each has a rail-to-rail voltage output buffer capable of
driving 10 k
/100 pF. Each has two selectable ranges, 0 V to
VREF (the internal band gap 2.5 V reference) and 0 V to AVDD.
Each can operate in 12-bit or 8-bit mode. Both DACs share a
control register, DACCON, and four data registers, DAC1H/L,
DAC0H/L. It should be noted that in 12-bit asynchronous
mode, the DAC voltage output will be updated as soon as the
DACL data SFR has been written; therefore, the DAC data
registers should be updated as DACH first, followed by DACL.
Note: for correct DAC operation on the 0 to VREF range, the
ADC must be switched on. This results in the DAC using the
correct reference value.
DACCON
DAC Control Register
SFR Address
FDH
Power-On Default Value
04H
Bit Addressable
No
Table IX. DACCON SFR Bit Designations
Bit
Name
Description
7
MODE
The DAC MODE bit sets the overriding operating mode for both DACs.
Set to “1” = 8-Bit Mode (Write 8 Bits to DACxL SFR).
Set to “0”= 12-Bit Mode.
6
RNG1
DAC1 Range Select Bit.
Set to “1” = DAC1 Range 0–VDD.
Set to “0” = DAC1 Range 0–VREF.
5
RNG0
DAC0 Range Select Bit.
Set to “1” = DAC0 Range 0–VDD.
Set to “0” = DAC0 Range 0–VREF.
4
CLR1
DAC1 Clear Bit.
Set to “0” = DAC1 Output Forced to 0 V.
Set to “1” = DAC1 Output Normal.
3
CLR0
DAC0 Clear Bit.
Set to “0” = DAC1 Output Forced to 0 V.
Set to “1” = DAC1 Output Normal.
2
SYNC
DAC0/1 Update Synchronization Bit.
When set to “1” the DAC outputs update as soon as DACxL SFRs are written. The user can
simultaneously update both DACs by first updating the DACxL/H SFRs while SYNC is “0.” Both
DACs will then update simultaneously when the SYNC bit is set to “1.”
1
PD1
DAC1 Power-Down Bit.
Set to “1” = Power-On DAC1.
Set to “0” = Power-Off DAC1.
0
PD0
DAC0 Power-Down Bit.
Set to “1” = Power-On DAC0.
Set to “0” = Power-Off DAC0.
DACxH/L
DAC Data Registers
Function
DAC Data Registers, written by user to update the DAC output.
SFR Address
DAC0L (DAC0 Data Low Byte)
F9H; DAC1L (DAC1 Data Low Byte)
FBH
DAC0H (DAC0 Data High Byte)
FAH; DAC1H(DAC1 Data High Byte)
FCH
Power-On Default Value
00H
All four Registers
Bit Addressable
No
All four Registers
The 12-bit DAC data should be written into DACxH/L right-justified such that DACxL contains the lower eight bits, and the lower
nibble of DACxH contains the upper four bits.
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