FDC37C935-QS Datasheet

I/O Controller Interface IC


The FDC37C93xAPM(FDC37C935-QS / FDC37C935 ) incorporates a keyboard interface, real-time clock, SMSCs true CMOS 765B floppy disk controller, advanced digital data separator, 16 byte data FIFO, two 16C550 compatible UARTs, one Multi-Mode parallel port which includes ChiProtect circuitry plus EPP and ECP support, IDE interface, on-chip 24 mA AT bus drivers, game port chip select and two floppy direct drive support, as well as ACCESS.bus, soft power management and SMI support. The true CMOS 765B core provides 100% compatibility with IBM PC/XT and PC/AT architectures in addition to providing data overflow and underflow protection. The SMSC advanced digital data separator incorporates SMSCs patented data separator technology, allowing for ease of testing and use. Both onchip UARTs are compatible with the NS16C550. The parallel port, the IDE interface, and the game port select logic are compatible with IBM PC/AT architecture, as well as EPP and ECP. The FDC37C93xAPM incorporates sophisticated power control circuitry (PCC). The PCC supports multiple low power down modes. FDC37C935-QS Features • 5 Volt Operation• ISA Plug-and-Play Standard (Version 1.0a) Compatible Register Set• Soft Power Management, SMI Support• ACPI/Legacy Support- SCI/SMI Support- Power Management Timer- Power Button Override Event- Either Edge Triggered Interrupts• ACCESS.bus Support• 8042 Keyboard Controller- 2K Program ROM- 256 Bytes Data RAM- Asynchronous Access to Two Data Registers and One Status Register- Supports Interrupt and Polling Access- 8 Bit Timer/Counter- Port 92 Support- Fast Gate A20 and Hardware Keyboard Reset• Real Time Clock- MC146818 and DS1287 Compatible- 256 Bytes of Battery Backed CMOS in Two Banks of 128 Bytes- 128 Bytes of CMOS RAM Lockable in 4x32 Byte Blocks- 12 and 24 Hour Time Format- Binary and BCD Format- 1 mA Standby Current (typ)• Intelligent Auto Power Management• 2.88MB Super I/O Floppy Disk Controller- Relocatable to 480 Different Addresses- 13 IRQ Options- Four DMA Options- Licensed CMOS 765B Floppy Disk Controller- Advanced Digital Data Separator- Software and Register Compatible with SMSCs Proprietary 82077AA Compatible Core- Sophisticated Power Control Circuitry (PCC) Including Multiple Powerdown Modes for Reduced Power Consumption- Game Port Select Logic- Supports Two Floppy Drives Directly- 24mA AT Bus Drivers- Low Power CMOS Design• Licensed CMOS 765B Floppy Disk Controller Core- Supports Vertical Recording Format- 16 Byte Data FIFO- 100% IBM® Compatibility- Detects All Overrun and Underrun Conditions- 48mA Drivers and Schmitt Trigger Inputs- DMA Enable Logic- Data Rate and Drive Control Registers• Enhanced Digital Data Separator- Low Cost Implementation- No Filter Components Required- 2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250 Kbps Data Rates- Programmable Precompensation Modes• Serial Ports- Relocatable to 480 Different Addresses


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Manufacturer information


Diodes Incorporated is a leading global manufacturer and supplier of high-quality, application-specific, standard products within the broad discrete, logic and analog semiconductor markets. Diodes Incorporated primarily serves the computing, consumer, communications, industrial and automotive segments. Diodes’ diverse product portfolio includes parts for LCD/LED TVs and displays, desktop, notebook and tablet computing, smartphones and hand-held devices, set-top boxes, power supplies and USB protection as well as many other application areas.

Diodes Incorporated offers a wide array of products including diodes, rectifiers, transistors, MOSFETs, gate drivers, protection devices, function-specific arrays, amplifiers and comparators, Hall-effect sensors and temperature sensors, power management devices including LED drivers, AC-DC converters and controllers, DC-DC switching regulators, linear voltage regulators, current monitors, and voltage reference and shunt regulators, along with special function devices including USB power switches, load switch devices, voltage supervisors and motor controllers.

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