atmega161-4pi ATMEL Corporation, atmega161-4pi Datasheet - Page 102

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

Port D Schematics
102
ATmega161(L)
Note that all port pins are synchronized. The synchronization latches are, however, not
shown in the figures.
Figure 64. Port D Schematic Diagram (Pin PD0)
Figure 65. Port D Schematic Diagram (Pin PD1)
PD0
WP:
WD:
RL:
RP:
RD:
RXD0:
RXEN0:
WP:
WD:
RL:
RP:
RD:
TXD0:
TXEN0:
PD1
MOS
PULL-
UP
MOS
PULL-
UP
WRITE PORTD
WRITE DDRD
READ PORTD LATCH
READ PORTD PIN
READ DDRD
UART0 TRANSMIT DATA
UART0 TRANSMIT ENABLE
WRITE PORTD
WRITE DDRD
READ PORTD LATCH
READ PORTD PIN
READ DDRD
UART0 RECEIVE DATA
UART0 RECEIVE ENABLE
RP
RL
RL
RP
Q
Q
PORTD1
RESET
RESET
DDD1
Q
Q
WD
WP
PORTD0
RD
RESET
RESET
R
C
R
C
DDD0
WD
WP
RD
C
C
D
D
D
D
TXEN0
TXD0
RXEN0
RXD0
1228D–AVR–02/07