Kc89c72 Datasheet [updated]

The is a versatile CMOS 8-bit microcontroller (MCU) manufactured by brands such as FILFACT and Samsung. Though sometimes categorised broadly as a memory chip due to its internal storage, it functions as a complete control unit equipped with integrated ROM and RAM, making it a staple for reliable data storage and execution in embedded systems. Core Specifications Based on its technical datasheet, the

is designed for stable performance in standard and industrial environments: Operating Voltage ( Vcccap V sub c c end-sub ): 4.75 V to 5.25 V. Clock Frequency: Supports a range from DC up to 24 MHz.

Memory Architecture: Includes 8 KB of Flash memory for code storage and 512 B of SRAM for data processing.

I/O Capability: High-current driving capability with up to $\pm$25 mA per pin. Temperature Range: Industrial grade, operating between -40∘Cnegative 40 raised to the composed with power C +85∘Cpositive 85 raised to the composed with power C . Key Features

Integrated Peripherals: Features an 8-bit A/D converter, 16-bit timers, and 8-bit I/O ports for diverse interfacing.

System Reliability: Includes a Watchdog Timer and Low Voltage Detection to prevent system hang-ups or data corruption during power fluctuations.

Packaging: Commonly available in a DIP-40 (Dual In-line Package) or PLCC format, facilitating easy through-hole mounting on printed circuit boards. kc89c72 datasheet

Compliance: Fully RoHS compliant, meeting modern environmental safety standards for lead-free electronics. Common Applications

is frequently utilised in sectors requiring consistent, low-power control logic: Automotive: Dashboard controllers and engine sensors.

Consumer Electronics: Home appliances and office automation tools. Security: Building access control and monitoring systems. Industrial: General-purpose machine control and automation.

You can find current stock and detailed technical documents on distribution sites like UTSource or Jotrin Electronics. KC89C72 | In Stock - utsource

* Package Type: DIP-40 Description: The KC89C72 is a CMOS 8-bit microcontroller with ROM, RAM, I/O ports, and timers. Features: 8- KC89C72 | In Stock - utsource

The Samsung KC89C72 is a 40-pin programmable sound generator featuring three tone generators, an internal noise generator, and 16-level volume control. It is functionally compatible with the AY-3-8910 and YM2149 chips, operating within an extended temperature range of for robust industrial and gaming applications. The is a versatile CMOS 8-bit microcontroller (MCU)

How to get the official datasheet

For exact electrical tables, pin diagrams, register maps, timing diagrams, and recommended PCB footprints you must consult the manufacturer’s official datasheet and application notes. Tell me if you want me to find and summarize the official PDF (I’ll fetch the current version and pull out exact pinout, electrical tables, and example circuits).

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The Quiet Poetics of Specifications

What makes the KC89C72 datasheet truly interesting, however, is what it omits. It does not tell you that this chip, when overclocked, produces a gritty, aliased distortion that modern musicians covet. It does not mention that the envelope generator has a quirk—a hold time that is slightly shorter than the Western original, giving Soviet-made music a unique rhythmic lilt. It provides no history of the factory workers who assembled these chips with outdated lithography machines, breathing microscopic dust that would later be diagnosed as a rare lung disease.

Instead, the datasheet offers only pure, sterile potential. It lists the three independent tone channels. It diagrams the 16-volume levels. It specifies the access time for the registers. It is a blueprint for a ghost. And when a modern DIYer powers up a circuit with a KC89C72, and that chip produces its first note—a raw, imperfect, beautifully utilitarian sound—they are not just hearing a sound. They are hearing the final, decoded message of the datasheet: I may be a copy. But I work.

Part 7: Where to Find the Official KC89C72 Datasheet

Despite the age of this component, several sources still host scanned PDFs of the original datasheet:

  1. Datasheet Archive websites (Alldatasheet, Datasheet4U, DatasheetCatalog)
  2. Retro computing repositories (Bitsavers.org, Archive.org – search “GI sound chip datasheets”)
  3. Microchip’s obsolete parts section (limited access, but application notes may be available)
  4. Vintage electronics forums (forum.6502.org, AtariAge, Smspower.org)

⚠️ Warning: Many free datasheet sites contain incomplete documents or mix pages from the KC89C72 with the AY8910. Verify the header page shows "KC89C72" and the Microchip / GoldStar logo. The Quiet Poetics of Specifications What makes the

Part 4: Internal Register Map

The KC89C72 contains 16 addressable registers (0 to 15), though not all are fully used. Here is the standard register map:

| Register (A8 = 0-15) | Name | Function | | :--- | :--- | :--- | | 0 | Channel A Fine Tune | Lower 8 bits of tone period | | 1 | Channel A Coarse Tune | Upper 4 bits of tone period | | 2 | Channel B Fine Tune | Lower 8 bits | | 3 | Channel B Coarse Tune | Upper 4 bits | | 4 | Channel C Fine Tune | Lower 8 bits | | 5 | Channel C Coarse Tune | Upper 4 bits | | 6 | Noise Period | 5-bit noise frequency control | | 7 | Mixer / I/O Enable | Enable/disable tone/noise per channel, I/O control | | 8 | Channel A Volume | 4-bit volume (or envelope enable) | | 9 | Channel B Volume | Same as above | | 10 | Channel C Volume | Same as above | | 11 | Envelope Fine | Lower 8 bits of envelope period | | 12 | Envelope Coarse | Upper 8 bits (total 16-bit envelope period) | | 13 | Envelope Shape | Cycle, hold, alternate, attack patterns | | 14 | I/O Port A | Not used on KC89C72 (read returns 0xFF) | | 15 | I/O Port B | Not used |

Example: To set Channel A to middle C (~261 Hz) with a 1 MHz clock:

The Ghost in the Silicon: Deconstructing the “KC89C72 Datasheet”

In the vast, silent libraries of the internet, few documents are as simultaneously mundane and mysterious as a discontinued semiconductor datasheet. To an outsider, the “KC89C72 Datasheet” appears as a dense thicket of timings, pinouts, and electrical characteristics—a bureaucratic tombstone for a forgettable chip. But to an electronics archaeologist, a retrocomputing enthusiast, or a curious engineer, this particular datasheet is a Rosetta Stone. It does not merely describe a component; it whispers the secret history of the Cold War’s silicon curtain, the birth of digital sound, and the art of elegant scarcity.

Part 1: Key Features Overview (Datasheet Summary)

Before diving into the pin configuration, let's highlight the core specifications that define the KC89C72.

| Parameter | Value | | :--- | :--- | | Function | Programmable Sound Generator (PSG) | | Package | 28-pin DIP (Dual Inline Package) or SOP | | Technology | CMOS (Low power consumption) | | Channels | 3 independent tone channels | | Noise Generator | 1 shared pseudo-random noise source | | Envelope Generator | 1 programmable envelope (can be cycled or single-shot) | | Output | 3-bit D/A converter (digital output, usually via external resistor ladder) | | Clock Frequency | Up to 2 MHz (some clones support up to 4 MHz) | | Supply Voltage (Vdd) | 5V ±10% | | Current Consumption | < 25 mA (typical), < 250 µA (standby) |

Why choose the KC89C72 over other PSGs?