71CHAPTER 3 PIN FUNCTION (μPD78058F SUBSERIES)3.2.13 AV DDThis is the analog power supply pin of the A/D converter and the port’s power supply pin. Always use the samevoltage as that of the V DD pin even when the A/D converter is not used.3.2.14 AV SSThis 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 VSS pin.3.2.15 RESETThis is a low-level active system reset input pin.3.2.16 X1 and X2Crystal resonator connect pins for main system clock oscillation.For external clock supply, input it to X1 and its inverted signal to X2.3.2.17 XT1 and XT2Crystal resonator connect pins for subsystem clock oscillation.For external clock supply, input it to XT1 and its inverted signal to XT2.3.2.18 V DDPositive power supply pin (Except the port)3.2.19 V SSGround potential pin (Except the port)3.2.20 V PP (PROM versions only)High-voltage apply pin for PROM programming mode setting and program write/verify. When in the normaloperating mode, connect directly to V SS .
