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2.2.11 AV
REF
This is an A/D converter reference voltage input pin. This pin is also used for analog power supply.
When no A/D converter is used, connect this pin to V
2.2.12 AV
SS
This is a ground voltage pin of A/D converter. Always use the same voltage as that of the V
no A/D converter is used.
2.2.13 RESET
This is a low-level active system reset input pin.
2.2.14 X1 and X2
Crystal resonator connect pins for main system clock oscillation. For external clock supply, input clock signal to
X1 and its inverted signal to X2.
2.2.15 XT1 and XT2
Crystal resonator connect pins for subsystem clock oscillation.
For external clock supply, input the clock signal to XT1 and its inverted signal to XT2.
2.2.16 V
and V
DD0
DD1
V
is a positive power supply port pin.
DD0
V
is a positive power supply pin other than port pin.
DD1
2.2.17 V
and V
SS0
SS1
V
is a ground potential port pin.
SS0
V
is a ground potential pin other than port pin.
SS1
2.2.18 V
(flash memory version only)
PP
High-voltage apply pin for flash memory programming mode setting and program write/verify.
Connect directly to V
SS0
2.2.19 IC (mask ROM version only)
The IC (Internally Connected) pin is provided to set the test mode to check the µ PD780065 Subseries at delivery.
Connect it directly to the V
When a voltage difference is produced between the IC pin and V
those two pins is too long or an external noise is input to the IC pin, the user's program may not operate normally.
40
CHAPTER 2 PIN FUNCTION
or V
in the normal operating mode.
SS1
or V
with the shortest possible wire in the normal operating mode.
SS0
SS1
• Connect IC pin to V
V
or V
SS0
Preliminary User's Manual U13420EJ2V0UM00
.
SS0
pin or V
SS0
SS1
pin or V
pin directly.
SS0
SS1
IC
SS1
As short as possible
pin even when
SS0
pin, because the wiring between
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