Rainbow Electronics AT90S8515 - Manual (Page 69)

69
AT90S8515
0841G–09/01
Figure 49. Port B Schematic Diagram (Pin PB5)
Figure 50. Port B Schematic Diagram (Pin PB6)
DA
T
A
B
U
S
D
D
Q
Q
RESET
RESET
C
C
WD
WP
RD
MOS
PULL-
UP
PB5
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
DDB5
PORTB5
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
PB6
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
DDB6
PORTB6
SPE
MSTR
SPI SLAVE
OUT
SPI MASTER
IN
RL
RP