Rainbow-electronics ATtiny28L Manual de usuario descargar pdf (Pagina 40)

ATtiny28L/V

1062E–10/01

• T0 – Port B, Bit 2

T0, Timer/Counter0 Counter source. See the timer description for further details. If T0 is

used as the counter source, the pull-up resistor on PB2 is disabled and PB2 will not give

low-level interrupts.

• AIN1 – Port B, Bit 1

AIN1, Analog Comparator Negative input. When the on-chip analog comparator is

enabled, this pin also serves as the negative input of the comparator. If the analog com-

parator is enabled, the pull-up resistors on PB1 and PB0 are disabled and these pins will

not give low-level interrupts.

• AIN0 – Port B, Bit 0

AIN0, Analog Comparator Positive input. When the on-chip analog comparator is

enabled, this pin also serves as the positive input of the comparator. If the analog com-

parator is enabled, the pull-up resistors on PB1 and PB0 are disabled and these pins will

not give low-level interrupts.

Port B Schematics Note that all port pins are synchronized. The synchronization latches are, however, not

shown in the figures.

Figure 31. Port B Schematic Diagram (Pins PB0 and PB1)

TA BUS

MOS

PULL-

PBn

RP: READ PORTB PIN

n : 0, 1

PULL-UP PORT B

COMPARATOR DISABLE

TO LOW-LEVEL DETECTOR

TO COMPARATOR

AINn

PWRDN

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Rainbow-electronics ATtiny28L Manual de usuario Pagina 40