Rainbow-electronics AT90LS4433 Bedienungsanleitung PDF herunterladen (Seite 74)

AT90S/LS4433

1042G–AVR–09/02

controlled by DDB2. When the pin is forced to be an input, the pull-up can still be con-

trolled by the PORTB2 bit. See the description of the SPI port for further details.

• OC1 – Port B, Bit 1

OC1, Output Compare Match output: PB1 pin can serve as an external output for the

Timer/Counter1 Output Compare. The pin has to be configured as an output (DDB1 set

[one]) to serve this function. See the timer description on how to enable this function.

The OC1 pin is also the output pin for the PWM mode timer function.

• ICP – Port B, Bit 0

ICP, Input Capture Pin: PB0 pin can serve as an external input for the Timer/Counter1

input capture. The pin has to be configured as an input (DDB0 cleared [zero]) to serve

this function. See the timer description on how to enable this function.

Figure 50. Port B Schematic Diagram (Pin PB0)

DATA BUS

RESET

MOS

PULL-

PB0

WP:

WD:

RL:

RP:

RD:

ACIC:

ACO:

WRITE PORTB

WRITE DDRB

READ PORTB LATCH

READ PORTB PIN

READ DDRB

COMPARATOR IC ENABLE

COMPARATOR OUTPUT

DDB6

PORTB0

NOISE CANCELER EDGE SELECT ICF1

ICNC1 ICES1

ACIC

ACO

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Rainbow-electronics AT90LS4433 Bedienungsanleitung Seite 74