AT90S4433_14 Datasheet, PDF (83/126 Pages) ATMEL Corporation – Data and Non-volatile Program Memory

AT90S/LS4433
Figure 58. Port D Schematic Diagram (Pin PD1)
MOS
PULL-
UP
PD1
RL
RD
RESET
R
Q
D
DDD1
C
WD
RESET
QR D
PORTD1
C
WP
RP
WP: WRITE PORTD
WD: WRITE DDRD
RL: READ PORTD LATCH
RP: READ PORTD PIN
RD: READ DDRD
TXD: UART TRANSMIT DATA
TXEN: UART TRANSMIT ENABLE
Figure 59. Port D Schematic Diagram (Pins PD2 and PD3)
TXEN
TXD
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1042H–AVR–04/03