參數(shù)資料
型號(hào): ADUC848BCPZ8-5
廠商: Analog Devices Inc
文件頁(yè)數(shù): 50/108頁(yè)
文件大?。?/td> 0K
描述: IC MCU FLASH W/16BIT ADC 56-CSP
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: 12.58MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: POR,PSM,PWM,溫度傳感器,WDT
輸入/輸出數(shù): 34
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> 4K x 8
RAM 容量: 2.25K x 8
電壓 - 電源 (Vcc/Vdd): 4.75 V ~ 5.25 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 10x16b; D/A 1x12b,2x16b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 56-VFQFN 裸露焊盤,CSP
包裝: 托盤
ADuC845/ADuC847/ADuC848
Data Sheet
Rev. C | Page 46 of 108
SF (ADC SINC FILTER CONTROL REGISTER)
The SF register is used to configure the decimation factor for the ADC, and therefore, has a direct influence on the ADC throughput rate.
SFR Address:
D4H
Power-On Default:
45H
Bit Addressable:
No
Table 28. Sinc Filter SFR Bit Designations
SF.7
SF.6
SF.5
SF.4
SF.3
SF.2
SF.1
SF.0
0
1
0
1
0
1
The bits in this register set the decimation factor of the ADC. This has a direct bearing on the throughput rate of the ADC along with the
chop setting. The equations used to determine the ADC throughput rate are
Fadc (Chop On) =
SFword
×
×8
3
1
× 32.768 kHz
where SFword is in decimal.
Fadc (Chop Off) =
SFword
×
8
1
× 32.768 kHz
where SFword is in decimal.
Table 29. SF SFR Bit Examples
Chop Enabled (ADCMODE.3 = 0)
SF (Decimal)
SF (Hexadecimal)
Fadc (Hz)
Tadc (ms)
Tsettle (ms)
0D
105.3
9.52
19.04
69
45
19.79
50.53
101.1
82
52
16.65
60.06
120.1
255
FF
5.35
186.77
373.54
Chop Disabled (ADCMODE.3 = 1)
SF (Decimal)
SF (Hexadecimal)
Fadc (Hz)
Tadc (ms)
Tsettle (ms)
3
03
1365.3
0.73
2.2
69
45
59.36
16.84
50.52
82
52
49.95
20.02
60.06
255
FF
16.06
62.25
186.8
1
With chop enabled, if an SF word smaller than 13 is written to this SF register, the filter automatically defaults to 13.
During ADC calibration, the user-programmed value of SF word is used. The SF word does not default to the maximum setting (255) as it
did on previous MicroConverter products. However, for optimum calibration results, it is recommended that the maximum SF word be set.
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