MOS INTEGRATED CIRCUIT µPD78F9177 - Data Sheet - Flash Memory Microcontroller

Oct 12, 2026

MOS integrated circuit data sheet for the 8-bit single-chip microcontroller family featuring the µPD78F9177 and µPD78F9177Y in the 78K/0S Series. The µPD78F9177 uses flash memory to replace internal ROM, and µPD78F9177Y replaces ROM with flash, enabling electric write/erase directly on the board. The document specifies key device capabilities such as flash and RAM sizes, A/D converter performance, I/O and serial interfaces, timers, watchdog features, power supply range, and typical applications like power windows and side air bags.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages56

Reading Time2 h 21 min

AccessFree to download

Features

Applications

Ordering Information

78K/0S Series Development

Major Differences Between Subseries

DATA SHEET MOS INTEGRATED CIRCUIT µPD78F9177 , 78F9177Y 8-BIT SINGLE-CHIP MICROCONTROLLER The µPD78F9177 and µPD78F9177Y are µPD789177, 789177Y Subseries (small, general-purpose) in the 78K/0S Series. The µPD78F9177 replaces the internal ROM of the µPD789176 and µPD789177 with flash memory, while the µPD78F9177Y replaces the ROM of the µPD789176Y and µPD789177Y with flash memory. Because flash memory allows the program to be written and erased electrically with the device mounted on the board, this product is ideal for the evolution stages of system development, small-scale production and rapid development of new products. Detailed function descriptions are provided in the following user’s manuals. Be sure to read them before designing. µPD789167, 789177, 789167Y, 789177Y Subseries User’s Manual: U14186E 78K/0S Series User's Manual Instruction: U11047E FEATURES • Pin compatible with mask ROM version (except VPP pin) • Flash memory: 24 Kbytes • High-speed RAM: 512 bytes • Minimum instruction execution time can be changed from high-speed (0.4 µs: @5.0-MHz operation with main system clock) to ultra-low-speed (122 µs: @ 32.768-kHz operation with subsystem clock) • 10-bit resolution A/D converter: 8 channels • I/O ports: 31 • Serial interface: 2 channels • 3-wire serial I/O mode / UART mode: 1 channel • SMB (µPD78F9177Y only): 1 channel • Timers: 6 channels • 16-bit timer: 1 channel • 8-bit timer/event counter: 2 channels • 8-bit timer: 1 channel • Watch timer: 1 channel • Watchdog timer: 1 channel • On-chip 16-bit multiplier • Power supply voltage: VDD = 1.8 to 5.5 V The information in this document is subject to change without notice. Before using this document, please confirm that this is the latest version. Not all devices/types available in every country. Please check with local NEC representative for availability and additional information. Document No. U14022EJ1V0DS00 (1st edition) Date Published August 2000 NS CP(K) Printed in Japan [www.DataSheet4U.net](www.DataSheet4U.net) The mark shows major revised © 2000 APPLICATIONS Power windows, battery management unit, side air bags, etc ORDERING INFORMATION (1) µPD78F9177 Part Number Package µPD78F9177GB-8ES 44-pin plastic QFP (10 × 10) (2) µPD78F9177Y Part Number Package µPD78F9177YGB-8ES µPD78F9177YGA-9EU 44-pin plastic LQFP (10 X 10) 48-pin plastic TQFP (fine pitch) (7 X 7) 2 Data Sheet U14022EJ1V0DS00 78K/0S SERIES DEVELOPMENT The products in the 78K/0S Series are listed below. The names enclosed in boxes are subseries names. Products under mass production Products under development Y subseries supports SMB. Small, general-purpose 44 pins 42/44 pins 28 pins | µPD789046
µPD789026 | | --- | | µPD789014 | Small, general-purpose + A/D For inverter control For driving LCD 44 pins 80 pins 80 pins 64 pins 64 pins 64 pins 64 pins 64 pins 64 pins µ PD789842 µ PD789436 µ PD789426 µ PD789316 µ PD789306 µ PD789456 µ PD789446 µPD789417A µPD789407A For driving Dot LCD 144 pins 88 pins 52 pins 52 pins 44 pins 44 pins 20 pins 20 pins µ PD789835 µ PD789830 For ASSP ~~ µ PD789467 ~~ µ PD789327 µ PD789800 ~~µ PD789840~~ ~~µ PD789861~~ µ PD789860 µPD789026 with subsystem clock added µPD789014 with timer reinforced and ROM and RAM expanded UART. Low-voltage (1 .8-V) operation µPD789167 with improved A/D µ PD789104A with improved timer µPD789146 with improved A/D µPD789104A with EEPROM added µPD789124A with improved A/DRC oscillation model of µPD789104A µPD789104A with improved A/D µPD789026 with A/D and multiplier added Internal inverter control circuit and UART µ PD789407A with improved A/D µ PD789456 with improved I/O µ PD789446 with improved A/D µ PD789426 with improved display output µ PD789426 with improved A/D µ PD789306 with A/D added RC oscillation model of

FAQs

What is the main difference between µPD78F9177 and µPD78F9177Y?

µPD78F9177 replaces the internal ROM with flash memory, while µPD78F9177Y replaces the corresponding ROM with flash memory (including SMB support for µPD78F9177Y only).

Which key hardware features are highlighted in the datasheet?

It lists flash memory size, high-speed RAM, configurable instruction execution time range, an 8-channel 10-bit A/D converter, multiple I/O ports, serial interfaces, timers, watchdog timer, and an on-chip 16-bit multiplier.

Why is flash memory described as ideal for development and production stages?

Flash memory allows programs to be written and erased electrically with the device mounted on the board, supporting system development evolution, small-scale production, and rapid new product development.

Oct 12, 2026

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