Rainbow-electronics ATmega64C1 Manuel d'utilisateur télécharger pdf (Page 259)

259

7647A–AVR–02/08

ATmega32/64/M1/C1

Figure 20-1. Analog Comparator Block Diagram

(1)(2)

Notes: 1. ADC multiplexer output: see Table 18-5 on page 243.

2. Refer to Figure 1-1 on page 3 and for Analog Comparator pin placement.

3. The voltage on Vref is defined in 18-4 “ADC Voltage Reference Selection” on page 242

20.3 Use of ADC Amplifiers

Thanks to AMPCMP0 configuration bit, Comparator 0 positive input can be connected to Ampli-

fier O output. In that case, the clock of comparator 0 is adapted to the amplifier 0 clock. See

“Amplifier 0 Control and Status register – AMP0CSR” on page 251.

Thanks to AMPCMP1 configuration bit, Comparator 1 positive input can be connected to Ampli-

fier 1 output. In that case, the clock of comparator 1 is adapted to the amplifier 1 clock. See

“Amplifier 1 Control and Status register – AMP1CSR” on page 252.

Thanks to AMPCMP2 configuration bit, Comparator 2 positive input can be connected to Ampli-

fier 2 output. In that case, the clock of comparator 2 is adapted to the amplifier 2 clock. See

“Amplifier 1 Control and Status register – AMP1CSR” on page 252.

Interrupt Sensitivity Control

Analog Comparator 0 Interrupt

AC0IE

AC0IF

AC0O

AC0IS1 AC0IS0

Interrupt Sensitivity Control

Analog Comparator 1 Interrupt

AC1IE

T1 Capture Trigger

AC1ICE

AC1IF

AC1O

AC1IS1 AC1IS0

Interrupt Sensitivity Control

Analog Comparator 2 Interrupt

AC2IE

AC2IF

AC2O

AC2IS1 AC2IS0

ACMP0

ACMPN0

ACMP1

ACMP2

AC2EN

/3.20

/2.13

/1.60

/6.40

AMP2

AC0M

2 1 0

DAC

Result

AC1EN

AC0EN

AC1M

2 1 0

AC2M

2 1 0

CLK

I/O

CLK

I/O

CLK

I/O

(/2)

Internal 2.56V

Reference

REFS1

REFS0

Aref

AVcc

ACMPN1

ACMPN2

Interrupt Sensitivity Control

Analog Comparator 3 Interrupt

AC3IE

AC3IF

AC3O

AC3IS1 AC3IS0

ACMP3

AC3EN

AC3M

2 1 0

CLK

I/O

(/2)

ACMPN3

AMPCMP2

AMP0

AMPCMP0

AMP1

AMPCMP1

AMPCMP0

AMPCMP1

AMPCMP2

ADC

Bandgap

1 2 ... 254 255 256 257 258 259 260 261 262 263 264 ... 365 366

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