D78F9177 PDF – 8-Bit Single-Chip Microcontroller – NEC

This post describes for the Microcontroller.

The Part Number is D78F9177, uPD78F9177.

The function of this semiconductor is 8-BIT SINGLE-CHIP MICROCONTROLLER.

The package is QFP 44 Pin Type

The manufacturer of this part is NEC.

See the preview image and the PDF file for more information.

D78F9177 pdf datasheet


The D78F9177 is 8-Bit Single-Chip Microcontroller.

An 8-bit single-chip microcontroller refers to a type of microcontroller that has an 8-bit architecture. It is a complete computing system integrated onto a single chip.

Microcontrollers are programmable integrated circuits designed to control and manage various functions in electronic devices. They typically consist of a central processing unit (CPU), memory (both volatile and non-volatile), input/output (I/O) ports, timers, and sometimes analog-to-digital converters (ADCs) and other peripherals.

The “8-bit” specification indicates the word size or data width of the microcontroller’s CPU. It means that the microcontroller can process data in 8-bit chunks, allowing it to manipulate binary numbers and perform calculations on 8 bits at a time. The 8-bit architecture is considered relatively simple and is often used in applications where cost, power consumption, or size constraints are important factors.

The uPD78F9177 and uPD78F9177Y are uPD789177, 789177Y Subseries (small, general-purpose) in the 78K/0S Series. The uPD78F9177 replaces the internal ROM of the uPD789176 and uPD789177 with flash memory, while the uPD78F9177Y replaces the ROM of the uPD789176Y and uPD789177Y 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.


• 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 ms: @5.0-MHz operation with main system clock) to ultra-low-speed (122 ms: @ 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 (mPD78F9177Y 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


D78F9177 pinout microcontroller

D78F9177 PDF Datasheet