Rainbow-electronics AT90LS4433 Manual do Utilizador descarregar pdf (Página 76)

76

AT90S/LS4433

1042G–AVR–09/02

Figure 53. Port B Schematic Diagram (Pin PB3)

Figure 54. Port B Schematic Diagram (Pin PB4)

DATA 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

DATA 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

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 124 125

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