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 that also includes Hardware Monitoring capabilities, enhanced Security features, Power Control logic and Motherboard Glue logic. 

These three Product Families incorporate complete legacy Super I/O, including a floppy disk controller with Microchip's true CMOS 765B core and enhanced digital data separator. The true CMOS 765B core provides 100% compatibility with IBM PC/XTTM and PC/ATTM architectures and is software and register compatible with Microchip's proprietary 82077AA core.  The SCH3112 family supports multiple low power-down modes, and the ISA Plug-and-Play Standard register set (Version 1.0a).

Family parts
SCH3112I-NU
SCH3112I-NU-R00
SCH3112-NU

• 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
• Hardware monitoring: temperature, voltage and fan speed monitoring.
• Motherboard Glue logic: various power management and system logic (generation of nRSMRST, a programmable Clock output, reset generation, and watchdog timer)