Rainbow Electronics ATmega103L - Manual (Page 81)

ATmega603/103
81
Figure 58. Port B Schematic Diagram (Pin PB4)
Figure 59. Port B Schematic Diagram (Pins PB5 and PB6)
DA
T
A
B
U
S
D
D
Q
Q
RESET
RESET
C
C
WD
WP
RD
RP
RL
MOS
PULL-
UP
PB4
R
R
WP:
WD:
RL:
RP:
RD: WRITE PORTB
WRITE DDRB
READ PORTB LATCH
READ PORTB PIN
READ DDRB
DDB4
PORTB4
COMP. MATCH 0
COM01
COM01
OUTPUT
MODE SELECT
DA
T
A
B
U
S
D
D
Q
Q
RESET
RESET
C
C
WD
WP
RD
RP
RL
MOS
PULL-
UP
PBn
R
R
WP:
WD:
RL:
RP:
RD:
n:
X: WRITE PORTB
WRITE DDRB
READ PORTB LATCH
READ PORTB PIN
READ DDRB
5, 6
A, B
DDBn
PORTBn
COMP. MATCH 1X
COM1X0
COM1X1
OUTPUT
MODE SELECT