Port d schematics – Rainbow Electronics AT90LS8535 User Manual
Page 89

89
AT90S/LS8535
1041H–11/01
Port D Schematics
Note that all port pins are synchronized. The synchronization latches are, however, not
shown in the figures.
Figure 61. Port D Schematic Diagram (Pin PD0)
Figure 62. Port D Schematic Diagram (Pin PD1)
DA
T
A
BUS
D
D
Q
Q
RESET
RESET
C
C
WD
WP
RD
MOS
PULL-
UP
PD0
RXD
RXEN
WP:
WD:
RL:
RP:
RD:
RXD:
RXEN:
WRITE PORTD
WRITE DDRD
READ PORTD LATCH
READ PORTD PIN
READ DDRD
UART RECEIVE DATA
UART RECEIVE ENABLE
DDD0
PORTD0
RL
RP
DA
T
A
BUS
D
D
Q
Q
RESET
RESET
C
C
WD
WP
RD
RP
RL
MOS
PULL-
UP
PD1
R
R
WP:
WD:
RL:
RP:
RD:
TXD:
TXEN:
WRITE PORTD
WRITE DDRD
READ PORTD LATCH
READ PORTD PIN
READ DDRD
UART TRANSMIT DATA
UART TRANSMIT ENABLE
DDD1
PORTD1
TXEN
TXD
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