Rainbow-electronics ATmega64M1 Manuel d'utilisateur télécharger pdf (Page 252)

252

8209A–AVR–08/09

ATmega16M1/32M1/64M1

These 2 bits determine the gain of the amplifier 2.

The different setting are shown in Table 22-12.

To ensure an accurate result, after the gain value has been changed, the amplifier input needs

to have a quite stable input value during at least 4 Amplifier synchronization clock periods.

• Bit 3 – AMPCMP2: Amplifier 2 - Comparator 2 connection

Set this bit to connect the amplifier 2 to the comparator 2 positive input. In this configuration the

comparator clock is adapted to the amplifier clock and AMP2TS2,AMP2TS1, AMP2TS0 bits

have no effect.

Clear this bit to normally use the Amplifier 2.

• Bit 2:0 – AMP2TS[2:0]: Amplifier 2 Clock Source Selection Bits

In accordance with the Table 22-13, 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.

Table 22-12. Amplifier 2 Gain Selection

AMP2G[1:0] Description

00 Gain 5

01 Gain 10

10 Gain 20

11 Gain 40

Table 22-13. AMP1 Clock Source Selection

AMP2TS[2:0] Clock Source

000 ADC Clock/8

001 Timer/Counter0 Compare Match

010 Timer/Counter0 Overflow

011 Timer/Counter1 Compare Match B

100 Timer/Counter1 Overflow

101 PSC Module 0 Synchronization Signal (PSS0)

110 PSC Module 1 Synchronization Signal (PSS1)

111 PSC Module 2 Synchronization Signal (PSS2)

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Rainbow-electronics ATmega64M1 Manuel d'utilisateur Page 252