Atmel AVR AT90S2313 Manual page 55

0839G–08/01
Figure 39. Port B Schematic Diagram (Pin PB3)
MOS
PULL-
UP
PB3
WP: WRITE PORTB
WD: WRITE DDRB
RL: READ PORTB LATCH
RP: READ PORTB PIN
RD: READ DDRB
Figure 40. Port B Schematic Diagram (Pins PB2 and PB4)
AT90S2313
RD
RESET
R
Q
D
DDB3
C
WD
RESET
R
Q
D
PORTB3
C
RL
WP
RP
COM1A0
COM1A1
OUTPUT
COMP. MATCH1
MODE SELECT
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