Single-Chip Microcontrollers User's Manual

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CHAPTER 4 PIN FUNCTION ( µ PD78058FY SUBSERIES)
4.1.2 PROM programming mode pins (PROM versions only)
Pin Name Input/Output Function
RESET Input PROM programming mode setting.
When +5 V or +12.5 V is applied to the VPP pin or a low level voltage is applied to the RESET pin,
the PROM programming mode is set.
VPP Input High-voltage application for PROM programming mode setting and program write/verify.
A0 to A16 Input Address bus
D0 to D7 Input/output Data bus
CE Input PROM enable input/program pulse input
OE Input Read strobe input to PROM
PGM Input Program/program inhibit input in PROM programming mode
VDD — Positive power supply
VSS — Ground potential