13 avdd, 14 avss, 15 reset – NEC PD78058FY(A) User Manual
Page 89: 16 x1 and x2, 17 xt1 and xt2, 18 vdd, 19 vss, 20 vpp (prom versions only)
89
CHAPTER 4 PIN FUNCTION (
µ
PD78058FY SUBSERIES)
4.2.13 AV
DD
This is the analog power supply pin of the A/D converter and the port’s power supply pin. Always use the same
voltage as that of the V
DD
pin even when the A/D converter is not used.
4.2.14 AV
SS
This is the ground potential pin for the A/D converter and D/A converter, and the ground potential pin for the port.
Even when the A/D converter and D/A converter are not used, always use the same potential as that of the V
SS
pin.
4.2.15 RESET
This is a low-level active system reset input pin.
4.2.16 X1 and X2
Crystal resonator connect pins for main system clock oscillation.
For external clock supply, input it to X1 and its inverted signal to X2.
4.2.17 XT1 and XT2
Crystal resonator connect pins for subsystem clock oscillation.
For external clock supply, input it to XT1 and its inverted signal to XT2.
4.2.18 V
DD
Positive power supply pin (Except the port)
4.2.19 V
SS
Ground potential pin (Except the port)
4.2.20 V
PP
(PROM versions only)
High-voltage apply pin for PROM programming mode setting and program write/verify. Connect directly to V
SS
in normal operating mode.
When in the normal operating mode, connect directly to V
SS
.