ATMEGA161_07 Datasheet, PDF (103/159 Pages) ATMEL Corporation – 8-bit Microcontroller with 16K Bytes of In-System Programmable Flash

ATmega161(L)
Figure 66. Port D Schematic Diagram (Pins PD2 and PD3)
WP: WRITE PORTD
WD: WRITE DDRD
RL: READ PORTD LATCH
RP: READ PORTD PIN
RD: READ DDRD
n:
2, 3
m: 0, 1
Figure 67. Port D Schematic Diagram (Pin PD4)
MOS
PULL-
UP
PD4
RD
RESET
R
Q
D
DDD4
C
WD
RESET
QRD
PORTD4
C
RL
WP
WP: WRITE PORTD
WD: WRITE DDRD
RL: READ PORTD LATCH
RP: READ PORTD PIN
RD: READ DDRD
AS2: ASYNCH SELECT T/C2
RP
AS2
T/C2 OSC
AMP INPUT
1228D–AVR–02/07
103