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141

2588B–AVR–11/06

ATtiny261/461/861

18.2.1 ACSRB – Analog Comparator Control and Status Register B

• Bit 7 – HSEL: Hysteresis Select

When this bit is written logic one, the hysteresis of the Analog Comparator is switched on. The

hysteresis level is selected by the HLEV bit.

• Bit 6 – HLEV: Hysteresis Level

When the hysteresis is enabled by the HSEL bit, the Hysteresis Level, HLEV, bit selects the hys-

teresis level that is either 20mV (HLEV=0) or 50mV (HLEV=1).

• Bit 2:0 – ACM2:ACM0: Analog Comparator Multiplexer

The Analog Comparator multiplexer bits select the positive and negative input pins of the Analog

Comparator. The different settings are shown in Table 18-2.

1 0 001001 000 AIN0 ADC9

1 0 001001 01x AIN1 ADC9

1 0 001001 1xx AIN2 ADC9

1 0 001010 000 AIN0 ADC10

1 0 001010 01x AIN1 ADC10

1 0 001010 1xx AIN2 ADC10

Table 18-2. Analog Comparator Multiplexed Input (Continued)

ACME ADEN MUX5..0 ACM2..0 Positive Input Negative Input

Bit 76543210

0x09 (0x29) HSEL HLEV

- - - ACM2 ACM1 ACM0 ACSRB

Read/Write R/W R/W R R R R/W R/W R/W

Initial Value00N/A00000

1 2 ... 136 137 138 139 140 141 142 143 144 145 146 ... 235 236

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