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(b) PCL
This is a clock output pin.
(c) BUZ
This is a buzzer output pin.
2.2.12 AV
REF
This is the A/D converter reference voltage input pin.
When the A/D converter is not used, connect this pin directly to EV
Note Connect port 2 directly to EV
2.2.13 AV
SS
This is the A/D converter ground potential pin. Even when the A/D converter is not used, always use this pin with
the same potential as the EV
2.2.14 RESET
This is the active-low system reset input pin.
2.2.15 X1 and X2
These are the pins for connecting a resonator for high-speed system clock.
When supplying an external clock, input a signal to the X1 pin and input the inverse signal to the X2 pin.
Remark The X1 and X2 pins of the
on-chip debug function is used. For details, refer to CHAPTER 27 ON-CHIP DEBUG FUNCTION
µ
(
PD78F0138HD ONLY).
2.2.16 XT1 and XT2
These are the pins for connecting a resonator for subsystem clock.
When supplying an external clock, input a signal to the XT1 pin and input the inverse signal to the XT2 pin.
2.2.17 V
and EV
DD
DD
V
is the positive power supply pin for other than ports.
DD
EV
is the positive power supply pin for ports.
DD
2.2.18 V
and EV
SS
SS
V
is the ground potential pin for other than ports.
SS
EV
is the ground potential pin for ports.
SS
2.2.19 FLMD0 and FLMD1
This is a pin for setting flash memory programming mode.
Connect FLMD0 to EV
SS
In flash memory programming mode, be sure to connect these pins to the flash programmer.
40
CHAPTER 2 PIN FUNCTIONS
when it is used as a digital port.
DD
pin or V
pin.
SS
SS
µ
PD78F0138HD can be used as on-chip debug mode setting pins when the
or V
in the normal operation mode (FLMD1 is not used in the normal operation mode).
SS
User's Manual U16899EJ2V0UD
Note
or V
.
DD
DD
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