Rainbow Electronics ATmega64C1 User Manual
Page 253
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7647A–AVR–02/08
ATmega32/64/M1/C1
Set this bit to connect the amplifier 1 to the comparator 1 positive input. In this configuration the
comparator clock is adapted to the amplifier clock and AMP1TS2,AMP1TS1, AMP1TS0 bits
have no effect.
Clear this bit to normally use the Amplifier 1.
• Bit 2:0 – AMP1TS2,AMP1TS1, AMP1TS0: Amplifier 1 Clock Source Selection Bits
In accordance with the Table 18-11, these 3 bits select the event which will generate the clock
for the amplifier 1. This clock source is necessary to start the conversion on the amplified
channel.
18.11.3
Amplifier 2 Control and Status register – AMP2CSR
• Bit 7 – AMP2EN: Amplifier 2 Enable Bit
Set this bit to enable the Amplifier 2.
Clear this bit to disable the Amplifier 2.
Clearing this bit while a conversion is running will take effect at the end of the conversion.
Warning: Always clear AMP2TS0:1 when clearing AMP2EN.
• Bit 6 – AMP2IS: Amplifier 2 Input Shunt
Set this bit to short-circuit the Amplifier 2 input.
Clear this bit to normally use the Amplifier 2.
• Bit 5, 4 – AMP2G1, 0: Amplifier 2 Gain Selection Bits
These 2 bits determine the gain of the amplifier 2.
The different setting are shown in
.
Table 18-11. AMP1 Clock Source Selection
AMP1TS2
AMP1TS1
AMP1TS0
Clock Source
0
0
0
ADC Clock/8
0
0
1
Timer/Counter0 Compare Match
0
1
0
Timer/Counter0 Overflow
0
1
1
Timer/Counter1 Compare Match B
1
0
0
Timer/Counter1 Overflow
1
0
1
PSC Module 0 Synchronization Signal (PSS0)
1
1
0
PSC Module 1 Synchronization Signal (PSS1)
1
1
1
PSC Module 2 Synchronization Signal (PSS2)
Bit
7
6
5
4
3
2
1
0
AMP2EN
AMP2IS
AMP2G1
AMP2G0
AMPCMP2
AMP2TS2
AMP2TS1
AMP2TS0
AMP2CSR
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Table 18-12. Amplifier 2 Gain Selection
AMP2G1
AMP2G0
Description
0
0
Gain 5