Rainbow Electronics AT90LS8535 User Manual

Page 81

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81

AT90S/LS8535

1041H–11/01

Figure 53. Port B Schematic Diagram (Pins PB2 and PB3)

Figure 54. Port B Schematic Diagram (Pin PB4)

DA

TA

B

U

S

D

D

Q

Q

RESET

RESET

C

C

WD

WP

RD

MOS
PULL-
UP

PBn

AINm

TO COMPARATOR

WP:
WD:
RL:
RP:
RD:
n:
m:

WRITE PORTB
WRITE DDRB
READ PORTB LATCH
READ PORTB PIN
READ DDRB
2, 3
0, 1

PWRDN

DDBn

PORTBn

RL

RP

DA

T

A

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

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