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Description
The UPD74HC32C is an IC chip in the electronic component model category. It is an LSI floppy disk controller (FDC) chip that simplifies the design of an external phase-locked loop and write precompensation circuitry. The UPD74HC32C is capable of interfacing a processor to 4 floppy disk drives and supports both IBM 3740 single density format (FM) and IBM System 34 double density format (MFM) including double-sided recording. It handles most of the burdens associated with implementing a floppy disk interface.
Specifications and features
The UPD74HC32C features internal address mark detection circuitry, making the phase-locked loop and read electronics simpler. It offers user-programmable track stepping rate, head load time, and head unload time. Additionally, it supports multi-track and multi-side read and write commands, as well as single and double density capabilities. Other features include variable recording length, IBM-compatible format for single- and double-sided, single- and double-density, multi-sector and multi-track transfer capability, support for up to 4 floppy or micro floppy disk drives, data scan capability for comparing byte-for-byte host memory and disk data, data transfers in DMA or non-DMA mode, parallel seek operations on up to four drives, and compatibility with uPD8080/85, uPD8086/88, V-series, and uPD780 microprocessors. It operates on a single-phase clock with a maximum frequency of 8 MHz and requires a 3 +5V power supply.
Application Scenarios
The UPD74HC32C is commonly used in electronic devices that require interfacing with floppy disk drives. It can be used in computer systems, industrial controllers, data storage devices, and other applications where floppy disk interface functionality is needed.
Comparison
Advantages- Simplifies the design of an external phase-locked loop and write precompensation circuitry
- Supports both IBM 3740 single density format (FM) and IBM System 34 double density format (MFM) including double-sided recording
- Handles most of the burdens associated with implementing a floppy disk interface
- Offers user-programmable track stepping rate, head load time, and head unload time
- Supports multi-track and multi-side read and write commands
- Supports single and double density capabilities
- Provides variable recording length and multi-sector and multi-track transfer capability
- Compatible with various microprocessors
Disadvantages- Requires a 3 +5V power supply
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Datasheet
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Popular parts of the same kind
- Datasheet: Download UPD74HC32C
- Chipdatas Part: CD94-UPD74HC32C
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- Last Updated: 2024/06/03 09:05 +0800
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