Rainbow Electronics ATtiny861_V - Manual (Page 141)

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 7 6 5 4 3 2 1 0
0x09 (0x29) HSEL HLEV - - - ACM2 ACM1 ACM0 ACSRB
Read/Write R/W R/W R R R R/W R/W R/W
Initial Value 0 0 N/A 0 0 0 0 0