Atmel AVR AT90S8515-4 Especificaciones descargar pdf (Pagina 68)

68

AT90S8515

0841G–09/01

Figure 47. Port B Schematic Diagram (Pins PB2 and PB3)

Figure 48. Port B Schematic Diagram (Pin PB4)

DATA BUS

D

D

Q

Q

RESET

RESET

C

C

WD

WP

RD

MOS

PULL-

UP

PB4

SPI SS

MSTR

SPE

WP:

WD:

RL:

RP:

RD:

MSTR:

SPE:

WRITE PORTB

WRITE DDRB

READ PORTB LATCH

READ PORTB PIN

READ DDRB

SPI MASTER ENABLE

SPI ENABLE

DDB4

PORTB4

RL

RP

1 2 ... 63 64 65 66 67 68 69 70 71 72 73 ... 111 112

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