Rainbow-electronics ATmega64M1 Manuel d'utilisateur télécharger pdf (Page 251)

251

8209A–AVR–08/09

ATmega16M1/32M1/64M1

• Bit 3 – AMPCMP1: Amplifier 1 - Comparator 1 connection

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 – AMP1TS[2:0]: Amplifier 1 Clock Source Selection Bits

In accordance with the Table 22-11, 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.

22.10.10 AMP2CSR – Amplifier 2 Control and Status register

• 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 – AMP2G[1:0]: Amplifier 2 Gain Selection Bits

Table 22-11. AMP1 Clock Source Selection

AMP1TS[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)

Bit 76543210

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

1 2 ... 246 247 248 249 250 251 252 253 254 255 256 ... 342 343

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Rainbow-electronics ATmega64M1 Manuel d'utilisateur Page 251