ata6616 ATMEL Corporation, ata6616 Datasheet - Page 231

• Manufacturer Part Number: ata6616
• Description: Microcontroller With Lin Transceiver, 5v Regulator And Watchdog
• Manufacturer: ATMEL Corporation

4.18.11.2
9132A–AUTO–10/08
DRAFT
ADCSRA – ADC Control and Status Register A
Table 4-58.
• Bit 7 – ADEN: ADC Enable
Writing this bit to one enables the ADC. By writing it to zero, the ADC is turned off. Turning the
ADC off while a conversion is in progress, will terminate this conversion.
• Bit 6 – ADSC: ADC Start Conversion
In Single Conversion mode, write this bit to one to start each conversion. In Free Running mode,
write this bit to one to start the first conversion. The first conversion after ADSC has been written
after the ADC has been enabled, or if ADSC is written at the same time as the ADC is enabled,
will take 25 ADC clock cycles instead of the normal 13. This first conversion performs initializa-
tion of the ADC.
ADSC will read as one as long as a conversion is in progress. When the conversion is complete,
it returns to zero. Writing zero to this bit has no effect.
• Bit 5 – ADATE: ADC Auto Trigger Enable
When this bit is written to one, Auto Triggering of the ADC is enabled. The ADC will start a con-
version on a positive edge of the selected trigger signal. The trigger source is selected by setting
the ADC Trigger Select bits, ADTS in ADCSRB.
Bit
Read/Write
Initial Value
MUX[4..0]
1 0000
1 0001
1 0010
1 0011
1 0100
1 0101
1 0110
1 0111
1 1000
1 1001
1 1010
1 1011
1 1100
1 1101
1 1110
1 1111
Input Channel Selections (Continued)
ADEN
R/W
7
0
Single Ended Input
ADSC
R/W
6
0
N/A
ADATE
ATA6616/ATA6617 [Preliminary]
R/W
5
0
ADIF
R/W
4
0
Differential Input
ADC8 (PB5)
ADC9 (PB6)
ADC0 (PA0)
ADC1 (PA1)
ADC2 (PA2)
ADC4 (PA4)
ADC5 (PA5)
ADC6 (PA6)
ADIE
R/W
Positive
3
0
ADPS2
R/W
2
0
Differential Input
ADPS1
ADC10 (PB7)
ADC9 (PB6)
R/W
ADC1 (PA1)
ADC2 (PA2)
ADC3 (PA3)
ADC5 (PA5)
ADC6 (PA6)
ADC7 (PA7)
1
0
Negative
ADPS0
R/W
0
0
ADCSRA
Gain
20x
20x
20x
20x
20x
20x
20x
20x
8x
8x
8x
8x
8x
8x
8x
8x
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