atmega161-4pi ATMEL Corporation, atmega161-4pi Datasheet - Page 20

• Manufacturer Part Number: atmega161-4pi
• Description: 8-bit Microcontroller With 16k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

20
ATmega161(L)
Table 1. ATmega161 I/O Space
Note:
(SRAM Address)
I/O Address
$1C ($3C)
$1A ($3A)
$0E ($2E)
$0D ($2D)
$0C ($2C)
$0B ($2B)
$0A ($2A)
$0F ($2F)
$19 ($39)
$18 ($38)
$17 ($37)
$16 ($36)
$15 ($35)
$14 ($34)
$13 ($33)
$12 ($32)
$11 ($31)
$10 ($30)
$09 ($29)
$08 ($28)
$07 ($27)
$06 ($26)
$05 ($25)
$03 ($23)
$02 ($22)
$01 ($21)
$00 ($20)
$1B($3B)
1. Reserved and unused locations are not shown in this table.
Name
EECR
PORTA
DDRA
PINA
PORTB
DDRB
PINB
PORTC
DDRC
PINC
PORTD
DDRD
PIND
SPDR
SPSR
SPCR
UDR0
UCSR0A
UCSR0B
UBRR0
ACSR
PORTE
DDRE
PINE
UDR1
UCSR1A
UCSR1B
UBRR1
(1)
Function
EEPROM Control Register
Data Register, Port A
Data Direction Register, Port A
Input Pins, Port A
Data Register, Port B
Data Direction Register, Port B
Input Pins, Port B
Data Register, Port C
Data Direction Register, Port C
Input Pins, Port C
Data Register, Port D
Data Direction Register, Port D
Input Pins, Port D
SPI I/O Data Register
SPI Status Register
SPI Control Register
UART0 I/O Data Register
UART0 Control and Status Register
UART0 Control and Status Register
UART0 Baud Rate Register
Analog Comparator Control and Status Register
Data Register, Port E
Data Direction Register, Port E
Input Pins, Port E
UART1 I/O Data Register
UART1 Control and Status Register
UART1 Control and Status Register
UART1 Baud Rate Register
(Continued)
1228D–AVR–02/07