Atmega161(l) – Rainbow Electronics ATmega161L User Manual

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ATmega161(L)

1228C–AVR–08/02

Note:

1. Reserved and unused locations are not shown in this table.

$1C ($3C)

EECR

EEPROM Control Register

$1B($3B)

PORTA

Data Register, Port A

$1A ($3A)

DDRA

Data Direction Register, Port A

$19 ($39)

PINA

Input Pins, Port A

$18 ($38)

PORTB

Data Register, Port B

$17 ($37)

DDRB

Data Direction Register, Port B

$16 ($36)

PINB

Input Pins, Port B

$15 ($35)

PORTC

Data Register, Port C

$14 ($34)

DDRC

Data Direction Register, Port C

$13 ($33)

PINC

Input Pins, Port C

$12 ($32)

PORTD

Data Register, Port D

$11 ($31)

DDRD

Data Direction Register, Port D

$10 ($30)

PIND

Input Pins, Port D

$0F ($2F)

SPDR

SPI I/O Data Register

$0E ($2E)

SPSR

SPI Status Register

$0D ($2D)

SPCR

SPI Control Register

$0C ($2C)

UDR0

UART0 I/O Data Register

$0B ($2B)

UCSR0A

UART0 Control and Status Register

$0A ($2A)

UCSR0B

UART0 Control and Status Register

$09 ($29)

UBRR0

UART0 Baud Rate Register

$08 ($28)

ACSR

Analog Comparator Control and Status Register

$07 ($27)

PORTE

Data Register, Port E

$06 ($26)

DDRE

Data Direction Register, Port E

$05 ($25)

PINE

Input Pins, Port E

$03 ($23)

UDR1

UART1 I/O Data Register

$02 ($22)

UCSR1A

UART1 Control and Status Register

$01 ($21)

UCSR1B

UART1 Control and Status Register

$00 ($20)

UBRR1

UART1 Baud Rate Register

Table 1. ATmega161 I/O Space

(1)

(Continued)

I/O Address

(SRAM Address)

Name

Function