LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports The SCH3112I-NU is a Super I/O chip manufactured by SMSC (now part of Microchip Technology). Below are the specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** SMSC (Standard Microsystems Corporation)
- **Part Number:** SCH3112I-NU
- **Type:** Super I/O Controller
- **Package:** 128-pin LQFP (Low-Profile Quad Flat Package)
- **Operating Voltage:** 3.3V or 5V (depending on configuration)
- **Interface:** LPC (Low Pin Count) bus
- **Supported Peripherals:**
- Floppy Disk Controller (FDC)
- Serial Ports (UART)
- Parallel Port (SPP/EPP/ECP)
- Infrared (IrDA) support
- Keyboard Controller (KBC)
- Real-Time Clock (RTC)
- General-Purpose I/O (GPIO)
### **Descriptions:**
The SCH3112I-NU is a highly integrated Super I/O chip designed for embedded and PC-based systems. It consolidates multiple legacy I/O functions into a single chip, reducing system complexity and cost. It supports industry-standard interfaces and is commonly used in motherboards, industrial PCs, and embedded applications.
### **Features:**
- **Floppy Disk Controller (FDC):** Supports up to two drives with DMA or PIO modes.
- **Serial Ports (UART):** Two high-speed UARTs (16550 compatible) with IrDA support.
- **Parallel Port:** Supports Standard, EPP, and ECP modes.
- **Keyboard Controller (KBC):** PS/2 keyboard and mouse interface.
- **Real-Time Clock (RTC):** Battery-backed clock with alarm function.
- **General-Purpose I/O (GPIO):** Configurable pins for custom applications.
- **Low Pin Count (LPC) Interface:** Reduces motherboard pin count compared to legacy ISA.
- **Power Management:** Supports ACPI and legacy power-saving modes.
This information is based on the manufacturer's datasheet and technical documentation. For detailed electrical characteristics and register-level programming, refer to the official SMSC datasheet.
