Table 2.1.6 Connections Of Unused Pins - Renesas 4513 User Manual

APPLICATION
2.1 I/O pins

Table 2.1.6 connections of unused pins

Pin
X
OUT
VDCE
D –D
0 5
D /CNTR0
6
D /CNTR1
7
P2 /S
0 CK
P2 /S
1 OUT
P2 /S
2 IN
P3 /INT0
0
P3 /INT1
1
P3 , P3
2 3
P4 /A –P4 /A
0 IN4 3 IN7
P5 –P5 (Note 1)
0 3
A /CMP0-
IN0
A /CMP0+
IN1
A /CMP1-
IN2
A /CMP1+
IN3
P0 –P0
0 3
P1 –P1
0 3
Notes 1: After system is released from reset, port P5 is in an input mode (direction register FR0 = 0000
2: When the P0
PU0i="0") and also invalidate the key-on wakeup functions (register K0i="0") by software. When
these pins are connected to V
to return from RAM back-up state. When these pins are open, turn on their pull-up transistors
(register PU0i="1") by software, or set the output latch to "0."
Be sure to select the key-on wakeup functions and the pull-up functions with every two pins. If
only one of the two pins for the key-on wakeup function is used, turn on their pull-up transistors
by software and also disconnect the other pin. (i = 0, 1, 2, or 3.)
(Note in order to set the output latch to "0" and make pins open)
• After system is released from reset, a port is in a high-impedance state until the output latch of the port
is set to "0" by software. Accordingly, the voltage level of pins is undefined and the excess of the supply
current may occur.
• To set the output latch periodically is recommended because the value of output latch may change by
noise or a program run away (caused by noise).
(Note in order to connect unused pins to V
• To avoid noise, connect the unused pins to V
2-10
Open (when using an external clock).
Connect to V .
SS
Connect to V , or set the output latch to "0" and open.
SS
Connect to V .
SS
Connect to V , or set the output latch to "0" and open.
SS
Connect to V , or set the output latch to "0" and open.
SS
When the input mode is selected by software, pull-up to V
pull-down to V . When selecting the output mode, open.
SS
Connect to V .
SS
Open or connect to V
Open or connect to V
–P0 and P1 –P1 are connected to V
0 3 0 3
while the key-on wakeup functions are left valid, the system fails
SS
SS
4513/4514 Group User's Manual
Connection
(Note 2).
SS
(Note 2).
SS
, turn off their pull-up transistors (register
SS
or V )
DD
or V at the shortest distance using a thick wire.
SS DD
through a resistor or
DD
)
2