Rainbow-electronics ATmega64M1 Manual de usuario descargar pdf (Pagina 84)

8209A–AVR–08/09

ATmega16M1/32M1/64M1

14.4 Register Description

14.4.1 MCUCR – MCU Control Register

• Bit 4 – PUD: Pull-up Disable

When this bit is written to one, the pull-ups in the I/O ports are disabled even if the DDxn and

PORTxn Registers are configured to enable the pull-ups ({DDxn, PORTxn} = 0b01). See “Con-

figuring the Pin” on page 66 for more details on this feature.

14.4.2 PORTB – Port B Data Register

14.4.3 DDRB – Port B Data Direction Register

14.4.4 PINB – Port B Input Pins Address

14.4.5 PORTC – Port C Data Register

14.4.6 DDRC – Port C Data Direction Register

14.4.7 PINC – Port C Input Pins Address

Bit 7 6 5 4 3 2 1 0

SPIPS – –PUD– – IVSEL IVCE MCUCR

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

Initial Value 0 0 0 0 0 0 0 0

Bit 76543210

PORTB7 PORTB6 PORTB5 PORTB4 PORTB3 PORTB2 PORTB1 PORTB0 PORTB