Rainbow Electronics AT90LS4433 - Manual (Page 76)

76
AT90S/LS4433
1042G–AVR–09/02
Figure 53. Port B Schematic Diagram (Pin PB3)
Figure 54. Port B Schematic Diagram (Pin PB4)
DA
T
A
BUS
D
D
Q
Q
RESET
RESET
C
C
WD
WP
RD
MOS
PULL-
UP
PB3
R
R
WP:
WD:
RL:
RP:
RD:
SPE:
MSTR WRITE PORTB
WRITE DDRB
READ PORTB LATCH
READ PORTB PIN
READ DDRB
SPI ENABLE
MASTER SELECT
DDB3
PORTB3
SPE
MSTR
SPI MASTER
OUT
SPI SLAVE
IN
RL
RP
DA
T
A
BUS
D
D
Q
Q
RESET
RESET
C
C
WD
WP
RD
MOS
PULL-
UP
PB4
R
R
WP:
WD:
RL:
RP:
RD:
SPE:
MSTR WRITE PORTB
WRITE DDRB
READ PORTB LATCH
READ PORTB PIN
READ DDRB
SPI ENABLE
MASTER SELECT
DDB4
PORTB4
SPE
MSTR
SPI SLAVE
OUT
SPI MASTER
IN
RL
RP