AT90PWM216-16SE ATMEL [ATMEL Corporation], AT90PWM216-16SE Datasheet - Page 252

• Manufacturer Part Number: AT90PWM216-16SE
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable flash
• Manufacturer: ATMEL [ATMEL Corporation]

21.8.3
252
AT90PWM216/316
ADC Control and Status Register B– ADCSRB
Table 21-5.
Bit
Read/Write
Initial Value
• Bit 7 – ADHSM: ADC High Speed Mode
Writing this bit to one enables the ADC High Speed mode. Set this bit if you wish to convert with
an ADC clock frequency higher than 200KHz.
• Bit 3, 2, 1, 0– ADTS3:ADTS0: ADC Auto Trigger Source Selection Bits
These bits are only necessary in case the ADC works in auto trigger mode. It means if ADATE
bit in ADCSRA register is set.
In accordance with the Table 21-6, these 3 bits select the interrupt event which will generate the
trigger of the start of conversion. The start of conversion will be generated by the rising edge of
the selected interrupt flag whether the interrupt is enabled or not. In case of trig on PSCnASY
event, there is no flag. So in this case a conversion will start each time the trig event appears
and the previous conversion is completed..
Table 21-6.
ADPS2
0
0
0
0
1
1
1
1
ADTS3
0
0
0
0
0
0
0
0
1
1
ADC Prescaler Selection
ADC Auto Trigger Source Selection for non amplified conversions
ADPS1
0
0
1
1
0
0
1
1
ADTS2
0
0
0
0
1
1
1
1
0
0
ADHSM
7
0
-
6
0
-
-
ADPS0
0
1
0
1
0
1
0
1
ADTS1
0
0
1
1
0
0
1
1
0
0
5
0
-
-
Division Factor
2
2
4
8
16
32
64
128
ADTS0
0
1
0
1
0
1
0
1
0
1
4
0
-
-
ADTS3
R/W
3
0
Description
Free Running Mode
Analog Comparator 0
External Interrupt Request 0
Timer/Counter0 Compare Match
Timer/Counter0 Overflow
Timer/Counter1 Compare Match B
Timer/Counter1 Overflow
Timer/Counter1 Capture Event
PSC0ASY Event
PSC1ASY Event
ADTS2
R/W
2
0
ADTS1
R/W
1
0
(1)
ADTS0
R/W
0
0
7710D–AVR–08/09
ADCSRB