参数资料
型号: TSC80C31-25IDD
厂商: ATMEL CORP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 25 MHz, MICROCONTROLLER, PQFP44
封装: PLASTIC, QFP-44
文件页数: 58/132页
文件大小: 10886K
代理商: TSC80C31-25IDD
223
ATmega8535(L)
2502K–AVR–10/06
Special Function IO Register –
SFIOR
Bit 7:5 – ADTS2:0: ADC Auto Trigger Source
If ADATE in ADCSRA is written to one, the value of these bits selects which source will
trigger an ADC conversion. If ADATE is cleared, the ADTS2:0 settings will have no
effect. A conversion will be triggered by the rising edge of the selected interrupt flag.
Note that switching from a trigger source that is cleared to a trigger source that is set,
will generate a positive edge on the trigger signal. If ADEN in ADCSRA is set, this will
start a conversion. Switching to Free Running mode (ADTS[2:0]=0) will not cause a trig-
ger event, even if the ADC Interrupt Flag is set
.
Bit 4 – RES: Reserved Bit
This bit is reserved bit in the ATmega8535, and will always read as zero.
Bit
7
6
543
2
1
0
ADTS2
ADTS1
ADTS0
ACME
PUD
PSR2
PSR10
SFIOR
Read/Write
R/W
R
R/W
Initial Value
0
Table 87. ADC Auto Trigger Source Selections
ADTS2
ADTS1
ADTS0
Trigger Source
0
Free Running mode
0
1
Analog Comparator
0
1
0
External Interrupt Request 0
0
1
Timer/Counter0 Compare Match
1
0
Timer/Counter0 Overflow
1
0
1
Timer/Counter1 Compare Match B
1
0
Timer/Counter1 Overflow
1
Timer/Counter1 Capture Event
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