AT90S4433_14 Datasheet, PDF (75/126 Pages) ATMEL Corporation – Data and Non-volatile Program Memory

Figure 51. Port B Schematic Diagram (Pin PB1)
AT90S/LS4433
DDB1
PB1
PORTB1
WP: WRITE PORTB
WD: WRITE DDRB
RL: READ PORTB LATCH
RP: READ PORTB PIN
RD: READ DDRB
Figure 52. Port B Schematic Diagram (Pin PB2)
MOS
PULL-
UP
PB2
RL
RP
WP: WRITE PORTB
WD: WRITE DDRB
RL: READ PORTB LATCH
RP: READ PORTB PIN
RD: READ DDRB
MSTR: SPI MASTER ENABLE
SPE: SPI ENABLE
RD
RESET
Q
D
DDB2
C
WD
RESET
Q
D
PORTB2
C
WP
MSTR
SPE
SPI SS
75
1042H–AVR–04/03