RX610 Group
14. I/O Ports
R01UH0032EJ0120 Rev.1.20
Page 446 of 1006
Feb 20, 2013
14.5
Treatment of Unused Pins
The treatment of unused pins is listed in table 14.10.
Table 14.10 Treatment of Unused Pins
Pin Name
Expansion Mode with
On-Chip ROM Disabled
(16-Bit Bus Width)
Expansion Mode with
On-Chip ROM Disabled
(8-Bit Bus Width)
Expansion Mode with
On-Chip ROM Enabled Single-Chip Mode
EMLE
Connect this pin to Vss via a pull-down resistor.
MD1 to MD0
(Always used as mode pins)
MDE
(Always used as mode pins)
NMI
Connect this pin to Vcc via a pull-up resistor.
EXTAL
(Always used as a clock pin)
XTAL
Leave this pin open.
WDTOVF#
Leave this pin open.
Ports 0 to 4,
P57 to P54,
P67 to P61,
Ports 7 to 9,
PC7 to PC5
Connect these pins to Vcc via a pull-up resistor or to Vss via a pull-down resistor, respectively.
These pins can be left while Pm.ICR is in the initial state (the input buffer disabled)
*
.
P53
•
Connect this pin to Vcc via a pull-up resistor or to Vss via a pull-down
resistor.
•
This pin can be left while Pm.ICR is in the initial state (the input buffer
disabled)
*
.
•
Connect these pins
to Vcc via a pull-up
resistor or to Vss via
a pull-down resistor,
respectively.
•
These pins can be
left while Pm.ICR is
in the initial state (the
input buffer
disabled)
*
P52
This pin is left open for the RD# output.
P51
•
Connect this pin to Vcc via a pull-up resistor or to Vss via a pull-down
resistor.
•
This pin can be left while Pm.ICR is in the initial state (the input buffer
disabled)
*
.
P50
This pin is left open for the WR0#/WR# output.
P60,
Ports A and B,
PC4 to PC0
•
Connect these pins to Vcc via a pull-up resistor or to Vss via a pull-down
resistor.
•
These pins can be left while Pm.ICR is in the initial state (the input buffer
disabled)
*
.
Port D
(Used as a data bus)
•
Connect these pins
to Vcc via a pull-up
resistor or to Vss via
a pull-down resistor,
respectively.
Port E
(Used as a data bus)
•
Connect these pins to Vcc via a pull-up resistor or
to Vss via a pull-down resistor, respectively, for
the general input in the initial state.
•
These pins can be left while Pm.ICR is in the
initial state (the input buffer disabled)
*
Port F
•
Connect these pins to Vcc via a pull-up resistor or to Vss via a pull-down resistor.
•
These pins can be left while Pm.ICR is in the initial state (the input buffer
disabled)
*
.
Port G
Port H
VREFH
Connect this pin to AVcc
Note:
*
Do not change the initial value of Pm.ICR. Changing the initial value may generate shoot-through current.
Summary of Contents for RX600 Series
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