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LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports,I/O Controller Interface IC Integrated Embedded 4 UART

Hersteller : Microchip Technology, Inc
Verpackung/Behälter : TQFP-128
Produkt der Kategorien : I/O Controller Interface IC
Datasheet: SCH3114-NU Datasheet (PDF)
RoHs Status: Lead free / RoHS Compliant
Lagerbestand: 450


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SCH3114-NU Beschreibung

General Description

The SCH3112/SCH3114/SCH3116 Product Family is a 3.3V (Super I/O Block is 5V tolerant) PC99/PC2001 compliant Super I/O controller with an LPC interface. The SCH3112/SCH3114/SCH3116 Product Family also includes Hardware Monitoring capabilities, enhanced Security features, Power Control logic and Motherboard Glue logic

The SCH3112/SCH3114/SCH3116 Product Family's hardware monitoring capability includes temperature, voltage and fan speed monitoring. It has the ability to alert the system of out-of-limit conditions and automatically control the speeds of multiple fans. There are four analog inputs for monitoring external voltages of +5V, +2.5V, +12V and Vccp (core processor voltage), as well as internal monitoring of the SIO's VCC, VTR, and Vbat power supplies. The SCH3112/SCH3114/SCH3116 Product Family includes support for monitoring two external temperatures via thermal diode inputs and an internal sensor for measuring ambient temperature. The nHWM_INT pin is implemented to indicate outof-limit temperature, voltage, and FANTACH conditions. The hardware monitoring block of the SCH3112/SCH3114/SCH3116 Product Family is accessible via the LPC bus. The same interrupt event reported on the nHWM_INT pin also creates PME wakeup events. A separate THERMTRIP output is available, which generates a pulse output on a programmed over temperature condition. This can be used to generate an reset or shutdown indicator to the system.

The hardware monitoring capability also has programmable automatic FAN control. Three fan tachometer inputs and three pulse width modulator (PWM) outputs are available.

The Motherboard Glue logic includes various power management and system logic including generation of nRSMRST, a programmable Clock output, and reset generation. The reset generation includes a watchdog timer which can be used to generate a reset pulse. The width of this pulse is selectable via an external strapping option.

The SCH3112/SCH3114/SCH3116 Product Family incorporates complete legacy Super I/O functionality including an 8042 based keyboard and mouse controller, an IEEE 1284, EPP, and ECP compatible parallel port, multiple serial ports, one IrDA 1.0 infrared ports, and a floppy disk controller with SMSC's true CMOS 765B core and enhanced digital data separator, The true CMOS 765B core provides 100% compatibility with IBM PC/XT and PC/AT architectures and is software and register compatible with SMSC's proprietary 82077AA core. System related functionality, which offers flexibility to the system designer, General Purpose I/O control functions, and control of two LED's.

The serial ports are fully functional NS16550 compatible UARTs that support data rates up to 1.5 Mbps. There are four, 8 pin Serial Ports and two, 4pin Serial Ports. The reduced pin serial ports have selectable input and output controls. The Serial Ports contain programmable direction control, which will automatically Drive nRTS when the Output Buffer is loaded, then Drive nRTS when the Output Buffer is Empty. 

The SCH3112/SCH3114/SCH3116 Product Family is ACPI 1.0/2.0 compatible and therefore supports multiple low power-down modes. It incorporates sophisticated power control circuitry (PCC), which includes support for keyboard. 

The SCH3112/SCH3114/SCH3116 Product Family supports the ISA Plug-and-Play Standard register set (Version 1.0a). The I/O Address, DMA Channel and hardware IRQ of each logical device in the SCH3112/SCH3114/SCH3116 Product Family may be reprogrammed through the internal configuration registers. There are up to 480 (960 - Parallel Port) I/O address location options, a Serialized IRQ interface, and Three DMA channels.


General Features 

— 3.3 Volt Operation (SIO Block is 5 Volt Tolerant) 

— Low Pin Count Bus (LPC) Interface 

— Programmable Wake-up Event (PME) Interface 

— PC99, PC2001 Compliant 

— ACPI 2.0 Compliant — Serial IRQ Interface Compatible with Serialized IRQ Support for PCI Systems — ISA Plug-and-Play Compatible Register Set — Four Address Options for Power On Configuration Port — System Management Interrupt (SMI) — 40 General Purpose I/O pins — 6 GPIO with VID compatible inputs — Support for power button on PS/2 Keyboard — Security Key Register (32 byte) for Device Authentication

Watchdog Timer 

Resume and Main Power Good Generator 

Programmable Clock Output to 16 HZ. 

2.88MB Super I/O Floppy Disk Controller

— Licensed CMOS 765B Floppy DiskController 

— Supports Two Floppy Drives 

— Configurable Open Drain/Push-Pull 

— Supports Vertical Recording Format 

— 16-Byte Data FIFO 

— 100% IBM® Compatibility 

— Detects All Overrun and Underrun Conditions 

— Sophisticated Power Control Circuitry (PCC) Including Multiple Powerdown Modes for Reduced Power Consumption 

— DMA Enable Logic

— Data Rate and Drive Control Registers 

— 480 Address, Up to Eight IRQ and Four DMA Options 

— Support FDD Interface on Parallel Port Pins

Enhanced Digital Data Separator 

— 2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250 Kbp Data Rates 

— Programmable Precompensation Modes 

Keyboard Controller 

— 8042 Software Compatible 

— 8 Bit Microcomputer 

— 2k Bytes of Program ROM 

— 256 Bytes of Data RAM 

— Four Open Drain Outputs Dedicated for Keyboard/Mouse Interface 

— Asynchronous Access to Two Data Registers and One Status Register 

— Supports Interrupt and Polling Access 

— 8 Bit Counter Timer 

— Port 92 Support 

— Fast Gate A20 and KRESET Outputs 

— Phoenix Keyboard BIOS ROM 



  • 8042 Keyboard Controller
  • 128 VTQFP Package
  • Legacy I/O
  • 40 GPIO Pins
  • 32 byte Security Key Register
  • μController Fan Control Engine
  • PCH (Platform Controller Hub) Temperature monitoring
  • Glue logic
  • 3 PWM Outputs
  • 3 fan tachometer inputs
  • IEEE 1284, EPP and ECP Compatible Parallel Port
  • One IrDA 1.0 Infrared Port
  • NS16550 compatible UART serial ports
  • Four 8-pin serial ports
  • Two 4-pin serial ports
  • ACPI 1.0/2.0 compatible

SCH3114-NU Produkte

Technische Parameter

  • Product
  • RF / Wireless
  • Number of I/Os
  • 40
  • Operating Supply Voltage
  • 3.3 V
  • Maximum Operating Temperature
  • + 85 C
  • Minimum Operating Temperature
  • - 40 C
  • Mounting Style
  • Package / Case
  • VTQFP-128
  • Packaging
  • Tray
  • Data Bus Width
  • 8 bit
  • Operating Temperature
  • - 40 C to + 85 C
  • Factory Pack Quantity
  • 450

SCH3114-NU Datasheet

SCH3114-NU Verwandte besondere

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Estimated Delivery Time: Sep 28 - Oct 03 days (choose Expedited at checkout).

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  • 7-30 days

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All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

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1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


Q: How does Jotrin guarantee that SCH3114-NU is the original manufacturer or agent of MICROCHIP?
We have a professional business development department to strictly test and verify the qualifications of MICROCHIP original manufacturers and agents. All MICROCHIP suppliers must pass the qualification review before they can publish their SCH3114-NU devices; we pay more attention to the channels and quality of SCH3114-NU products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of SCH3114-NU chips? Including MICROCHIP original factory information, I/O Controller Interface IC application, SCH3114-NU pictures?
You can use Jotrin's intelligent search engine, or filter by Desktop and Industrial Super I/O Products category, or find it through Microchip Technology, Inc Information page.
Q: Are the MICROCHIP's SCH3114-NU price and stock displayed on the platform accurate?
The MICROCHIP's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for SCH3114-NU, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
Q: Can I place an order offline?
Yes. We accept offline orders.
We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online.
Q: What forms of payment can I use in Jotrin?
TT Bank, Paypal, Credit Card, Western Union, and Escrow is all acceptable.
Q: How is the shipping arranged and track my package?
Customers can choose industry-leading freight companies, including DHL, FedEx, UPS, TNT, and Registered Mail.
Once your order has been processed for shipment, our sales will send you an e-mail advising you of the shipping status and tracking number.
Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
Q: What is the process for returns or replacement of SCH3114-NU?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the SCH3114NU we delivered, we will accept the replacement or return of the SCH3114-NU only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of SCH3114-NU.
(3)The SCH3114-NU is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
Q: How to contact us and get support, such as SCH3114-NU datasheet pdf, SCH3114 pin diagram?
Need any After-Sales service, please feel free contact us:

Microchip Technology, Inc

Microchip Technology Inc. is a leading manufacturer of microcontroller and analog products, providing low-risk product development, lower total system cost, and faster time to market for thousands of diverse customer applications worldwide. Microchip offers outstanding technical support along with d...
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