Rainbow-electronics Atmega169L Instrukcja Użytkownika Pobierz pdf (Strona 58)

ATmega169V/L

2514A–AVR–08/02

Alternate Functions of Port B The Port B pins with alternate functions are shown in Table 29.

The alternate pin configuration is as follows:

• OC2A/PCINT15, Bit 7

OC2, Output Compare Match A output: The PB7 pin can serve as an external output for

the Timer/Counter2 Output Compare A. The pin has to be configured as an output

(DDB7 set (one)) to serve this function. The OC2A pin is also the output pin for the PWM

mode timer function.

PCINT15, Pin Change Interrupt source 15: The PB7 pin can serve as an external inter-

rupt source.

Table 28. Overriding Signals for Alternate Functions in PA3..PA0

Signal Name PA3/COM3 PA2/COM2 PA1/COM1 PA0/COM0

PUOE LCDEN •

(LCDMUX>2)

LCDEN •

(LCDMUX>1)

LCDEN •

(LCDMUX>0)

LCDEN

PUOV0000

DDOE LCDEN •

(LCDMUX>2)

LCDEN •

(LCDMUX>1)

LCDEN •

(LCDMUX>0)

LCDEN

DDOV0000

PVOE0000

PVOV0000

PTOE ––––

DIEOE LCDEN •

(LCDMUX>2)

LCDEN •

(LCDMUX>1)

LCDEN •

(LCDMUX>0)

LCDEN

DIEOV0000

DI ––––

AIO COM3 COM2 COM1 COM0

Table 29. Port B Pins Alternate Functions

Port Pin Alternate Functions

PB7

OC2A/PCINT15 (Output Compare and PWM Output A for Timer/Counter2 or Pin

Change Interrupt15).

PB6

OC1B/PCINT14 (Output Compare and PWM Output B for Timer/Counter1 or Pin

Change Interrupt14).

PB5

OC1A/PCINT13 (Output Compare and PWM Output A for Timer/Counter1 or Pin

Change Interrupt13).

PB4

OC0A/PCINT12 (Output Compare and PWM Output A for Timer/Counter0 or Pin

Change Interrupt12).

PB3 MISO/PCINT11 (SPI Bus Master Input/Slave Output or Pin Change Interrupt11).

PB2 MOSI/PCINT10 (SPI Bus Master Output/Slave Input or Pin Change Interrupt10).

PB1 SCK/PCINT9 (SPI Bus Serial Clock or Pin Change Interrupt9).

PB0 SS

/PCINT8 (SPI Slave Select input or Pin Change Interrupt8).

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 316 317

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