參數(shù)資料
型號(hào): SAF-C868-1RR
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 40 MHz, MICROCONTROLLER, PDSO38
封裝: PLASTIC, TSSOP-38
文件頁數(shù): 38/70頁
文件大?。?/td> 1067K
代理商: SAF-C868-1RR
C868
Data Sheet
43
V 0.2, 2002-01
Conversion and sample time control
The conversion and sample times are programmed via the bit fields ADCTC and ADSTC
respectively of the register ADCON1. Bit field ADCTC (conversion time control) selects
the internal ADC clock - adc_clk. Bit field ADSTC (sample time control) selects the
sample time.
Please note that the clock divider must be selected such that adc_clk does not exceed
2MHz.
The total A/D conversion time is given by:
tADCC = 4/fSYS + tS + 8.5/adc_clk
[5]
The sample time tS is configured in periods of the selected internal ADC clock. The table
below lists the possible combinations.
ADCTC
Clock
Divider
(TVC)
ADC Basic Clock
adc_clk
ADSTC
Sample Time tS
(Periods of
adc_clk, STC)
00 (default)
32
fSYS / 32
00 (default)
2
01
20
fSYS / 20
01
4
10
16
fSYS / 16
10
8
11
12
fSYS / 12
11
16
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