Rainbow Electronics AT90S1200 - Manual (Page 36)

36
AT90S1200
0838H–AVR–03/02
Figure 28. Port D Schematic Diagram (Pin PD2)
Figure 29. Port D Schematic Diagram (Pin PD4)
DA
T
A
BUS
D
D
Q
Q
RESET
RESET
C
C
WD
WP
RD
MOS
PULL-
UP
PD4
R
R
WP:
WD:
RL:
RP:
RD: WRITE PORTD
WRITE DDRD
READ PORTD LATCH
READ PORTD PIN
READ DDRD
DDD4
PORTD4
SENSE CONTROL TIMER0 CLOCK
SOURCE MUX
CS02 CS00
RL
RP
CS01