Renesas R8C/Tiny Series Instrukcja Obsługi Pobierz pdf (Strona 138)

R8C/10 Group 15. Programmable I/O Ports

Rev.1.20 Jan 27, 2006 page 128 of 180

REJ09B0019-0120

P

i

n

n

a

m

eC

o

n

n

e

c

t

i

o

n

P

o

r

t

s

P

0

,

P

1

,

P

3

0

t

o

P

3

3

,

P

3

7

,

P

4

5

A

V

C

C

,

V

R

E

F

A

V

S

S

C

o

n

n

e

c

t

t

o

V

C

C

C

o

n

n

e

c

t

t

o

V

S

S

N

O

T

E

S

:

1

.

W

h

e

n

t

h

e

s

e

p

o

r

t

s

a

r

e

s

e

t

f

o

r

o

u

t

p

u

t

m

o

d

e

a

n

d

l

e

f

t

o

p

e

n

,

t

h

e

y

r

e

m

a

i

n

i

n

p

u

t

m

o

d

e

u

n

t

i

l

t

h

e

y

a

r

e

s

e

t

f

o

r

o

u

t

p

u

t

m

o

d

e

b

y

a

p

r

o

g

r

a

m

.

T

h

e

v

o

l

t

a

g

e

l

e

v

e

l

o

f

t

h

e

s

e

p

i

n

s

m

a

y

b

e

u

n

s

t

a

b

l

e

a

n

d

t

h

e

p

o

w

e

r

s

u

p

p

l

y

c

u

r

r

e

n

t

m

a

y

i

n

c

r

e

a

s

e

f

o

r

t

h

e

t

i

m

e

t

h

e

p

o

r

t

s

r

e

m

a

i

n

i

n

p

u

t

m

o

d

e

.

T

h

e

c

o

n

t

e

n

t

o

f

t

h

e

d

i

r

e

c

t

i

o

n

r

e

g

i

s

t

e

r

s

m

a

y

c

h

a

n

g

e

d

u

e

t

o

n

o

i

s

e

o

r

r

u

n

a

w

a

y

c

a

u

s

e

d

b

y

n

o

i

s

e

.

I

n

o

r

d

e

r

t

o

e

n

h

a

n

c

e

p

r

o

g

r

a

m

r

e

l

i

a

b

i

l

i

t

y

,

s

e

t

t

h

e

d

i

r

e

c

t

i

o

n

r

e

g

i

s

t

e

r

s

p

e

r

i

o

d

i

c

a

l

l

y

b

y

a

p

r

o

g

r

a

m

.

2

.

C

o

n

n

e

c

t

t

h

e

s

e

u

n

a

s

s

i

g

n

e

d

p

i

n

s

t

o

t

h

e

m

i

c

r

o

c

o

m

p

u

t

e

r

u

s

i

n

g

t

h

e

s

h

o

r

t

e

s

t

w

i

r

e

l

e

n

g

t

h

(

w

i

t

h

i

n

2

c

m

)

p

o

s

s

i

b

l

e

.

Connect to V

CC

via resistor (pull-up)

(2)

P

o

r

t

s

P

4

6

,

P

4

7

•

A

f

t

e

r

s

e

t

t

i

n

g

f

o

r

i

n

p

u

t

m

o

d

e

,

c

o

n

n

e

c

t

e

v

e

r

y

p

i

n

t

o

V

S

S

v

i

a

a

r

e

s

i

s

t

o

r

(

p

u

l

l

-

d

o

w

n

)

o

r

c

o

n

n

e

c

t

e

v

e

r

y

p

i

n

t

o

V

C

C

v

i

a

a

r

e

s

i

s

t

o

r

(

p

u

l

l

-

u

p

)

•

S

e

t

t

o

o

u

t

p

u

t

m

o

d

e

a

n

d

l

e

a

v

e

t

h

e

s

e

p

i

n

s

o

p

e

n

(1

,

2

)

Table 15.24 Unassigned Pin Handling

15.3 Unassigned Pin Handling

Table 15.24 lists the handling of unassigned pins.

Figure 15.9 Unassigned Pin Handling

Port P0, P1,

P30 to P33, P37, P45

Microcomputer

(Input mode)

:

:

(Input mode)

(Output mode)

Open

Port P4

6, P47

AVCC/VREF

AVSS

:

:

1 2 ... 133 134 135 136 137 138 139 140 141 142 143 ... 198 199

Komentarze do niniejszej Instrukcji

Brak uwag