R5F21133DFP RENESAS [Renesas Technology Corp], R5F21133DFP Datasheet - Page 162

• Manufacturer Part Number: R5F21133DFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY/R8C/Tiny SERIES
• Manufacturer: RENESAS [Renesas Technology Corp]

R8C/13 Group
Rev.1.20
REJ09B0111-0120
Table 15.24 Unassigned Pin Handling
Figure 15.10 Unassigned Pin Handling
N O T E S :
15.3 Unassigned Pin Handling
P o r t s P 4
P o r t s P 0 , P 1 , P 3
P 3
A V
R E S E T
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
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 )
3 . W h e n p o w e r - o n r e s e t i s u s e d .
A V
Table 15.24 lists the handling of unassigned pins.
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 .
p o s s i b l e .
3
S S
C C
, P 3
Jan 27, 2006
, V
P i n n a m e
(3 )
7
R E F
6
P 4
, P 4
5
7
0
t o
page 151 of 205
N O T E S :
1 . W h e n p o w e r - o n r e s e t f u n c t i o n i s u s e d .
Connect to V
Connect to V
• 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 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
C o n n e c t t o V
C o n n e c t t o V
Port P0, P1,
P3
o r c o n n e c t e v e r y p i n t o V
0
to P3
M i c r o c o m p u t e r
3
, P3
CC
SS
C C
C C
7
, P4
v i a r e s i s t o r ( p u l l - u p )
v i a a r e s i s t o r ( p u l l - u p )
5
(Output mode)
P o r t P 4
(Input mode)
(Input mode)
A V
C C
R E S E T
C C
v i a a r e s i s t o r ( p u l l - u p )
:
:
6
/ V
A V
, P 4
R E F
C o n n e c t i o n
S S
(1)
(2 )
7
(2 )
O p e n
:
:
(1 , 2 )
S S
v i a a r e s i s t o r ( p u l l - d o w n )
15. Programmable I/O Ports