SCH3112/SCH3114/SCH3116
LPC IO with 8042 KBC, Reset Generation, HWM and
Multiple Serial Ports
Product Features
• General Features
- 3.3 Volt Operation (SIO Block is 5 Volt Tolerant)
- 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
• Low Pin Count Bus (LPC) Interface
- Supports LPC Bus frequencies of 19MHz to
33MHz
• 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 Disk Controller
- 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
2014 Microchip Technology Inc.
• 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
• Multiple Serial Ports
- SCH3112 - 2 Full Function Serial Ports
- SCH3114 - 4 Full Function Serial Ports
- SCH3116 - 4 Full Function and 2 Four-Pin
Serial Ports
- High Speed NS16C550A Compatible UARTs
with
- Send/Receive 16-Byte FIFOs
- Supports 230k, 460k, 921k and 1.5M Baud
- Programmable Baud Rate Generator
- Modem Control Circuitry
- 480 Address and 15 IRQ Options
- Support IRQ Sharing among serial ports
- RS485 Auto Direction Control Mode
• Infrared Port
- Multiprotocol Infrared Interface
- IrDA 1.0 Compliant
- SHARP ASK IR
- 480 Addresses, Up to 15 IRQ
• Multi-Mode™ Parallel Port with ChiProtect™
- Standard Mode IBM PC/XT®, PC/AT®, and
PS/2™ Compatible Bi-directional Parallel
Port
- Enhanced Parallel Port (EPP) Compatible EPP 1.7 and EPP 1.9 (IEEE 1284 Compliant)
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