參數(shù)資料
型號(hào): ADUC814BRUZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 15/72頁(yè)
文件大?。?/td> 0K
描述: IC ADC 12BIT W/FLASH MCU 28TSSOP
標(biāo)準(zhǔn)包裝: 50
系列: MicroConverter® ADuC8xx
核心處理器: 8052
芯體尺寸: 8-位
速度: 16.78MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: POR,PSM,溫度傳感器,WDT
輸入/輸出數(shù): 17
程序存儲(chǔ)器容量: 8KB(8K x 8)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 640 x 8
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 6x12b; D/A 2x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 28-TSSOP(0.173",4.40mm 寬)
包裝: 管件
產(chǎn)品目錄頁(yè)面: 738 (CN2011-ZH PDF)
配用: EVAL-ADUC814QSZ-ND - KIT DEV FOR ADUC814 MICROCONVRTR
ADuC814
Rev. A | Page 22 of 72
SFR INTERFACE TO ADC BLOCK
The ADC operation is fully controlled via three SFRs: ADCCON1, ADCCON2, and ADCCON3. These three registers control the mode
of operation.
ADCCON1 (ADC CONTROL SFR 1)
The ADCCON1 register controls conversion and acquisition times, hardware conversion modes, and power-down modes as detailed
below.
SFR Address
EFH
SFR Power-on Default
00H
Bit Addressable
No
MODE
EXT_REF
CK1
CK0
AQ1
AQ0
T2C
EXC
Table 6. ADCCON1 SFR Bit Designations
Bit No.
Name
Description
7
MODE
Mode Bit.
This bit selects the operating mode of the ADC.
Set to 1 by the user to power on the ADC.
Set to 0 by the user to power down the ADC.
6
EXT_REF
External Reference Select Bit.
This bit selects which reference the ADC uses when performing a conversion.
Set to 1 by the user to switch in an external reference.
Set to 0 by the user to switch in the on-chip band gap reference.
5
CK1
ADC Clock Divide Bits.
4
CK0
CK1 and CK0 combine to select the divide ratio for the PLL master clock used to generate the ADC clock. To ensure
correct ADC operation, the divider ratio must be chosen to reduce the ADC clock to 4.5 MHz and below. The
divider ratio is selected as follows:
CK1
CK0
PLL Divider
0
8
0
1
4
1
0
16
1
32
3
AQ1
The ADC Acquisition Time Select Bits.
2
AQ0
AQ1 and AQ0 combine to select the number of ADC clocks required for the input track-and-hold amplifier to
acquire the input signal. The acquisition time is selected as follows:
AQ1
AQ0
No. ADC Clks
0
1
0
1
2
1
0
3
1
4
1
T2C
The Timer2 Conversion Bit.
T2C is set to enable the Timer2 overflow bit to be used as the ADC convert start trigger input.
0
EXC
The External Trigger Enable Bit.
EXC is set to allow the external CONVST pin be used as the active low convert start trigger input. When enabled, a
rising edge on this input pin trigger a conversion. This pin should remain low for a minimum pulse width of
100 nsec at the required sample rate.
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