AMD ELANSC300-25KI

The ÉlanSC300 microcontroller is a highly integrated, low-voltage, single-chip implementation of the Am386SXLV microprocessor plus most of the additional logic needed for an AT-compatible personal computer. It is ideal for embedded PC applications, such as point-of-sale equipment, web appliances, industrial controls, and communication equipment. The ÉlanSC300 microcontroller combines an Am386SXLV low-voltage microprocessor core with a memory control unit, a Power Management Unit (PMU), and the bus control and peripheral control logic of a PC/AT-compatible computer. The ÉlanSC300 microcontroller includes a memory controller that supports up to 16 Mbyte of DRAM, Flash or ROM; power management functions; a bus controller that supports local or ISA bus; a serial port controller that is 16450 UART compatible; a bidirectional EPP-compliant parallel port; a 146818A-compatible real-time clock; internal phase-locked loops for clock generation; and standard PC logic chips (8259A, 8237A, and 8254). The ÉlanSC300 microcontroller’s true static design and low operating voltage enable battery-powered operation and lower weight for embedded PC applications. The internal core of the ÉlanSC300 microcontroller operates at 3.3 V and the I/O pads allow either 3.3 V or 5 V operation. Lowering typical operating voltage from 5 V to 3.3 V can dramatically reduce power consumption. Functionally, the ÉlanSC300 microcontroller is a 100% DOS/Windows-compatible, PC/AT-compatible computer on a chip that is designed to furnish the customer with a high-performance, low-power system solution, providing state-of-the-art power management in a small physical footprint. The ÉlanSC300 microcontroller is available in both 25- and 33-MHz versions, in a 208-lead Plastic Shrink Quad Flat Pack (QFP) (PQR package) and a 208-lead Thin Quad Flat Pack (TQFP) (PQL package).

• Highly integrated, single-chip CPU and system logic
• Optimized for embedded PC applications
• Combines 32 bit, x86 compatible, low-voltage CPU with memory controller, PC/AT peripheral controllers, real-time clock, and PLL clock generators
• 0.7 micron, low-voltage, CMOS process, fully static
• Enhanced Δm386 SXLV CPU core
• 25 MHz or 33 MHz operating frequencies
• 3.3 V core, 3.3 V or 5 V memory and I/O
• Low-power, fully static design for long battery life
• System Management Mode (SMM) for power management control
• Integrated power management functions
• Internal clock generators (using multiple Phase-Locked Loops and one external 32-KHz crystal)
• Supports CPU System Management Mode (SMM)
• Multiple operating modes: High Speed PLL, Low Speed PLL, Doze, Sleep, Suspend, and Off. Fully static design allows stopped clock.
• Comprehensive control of system and peripheral clocks
• Five external power management control pins
• Suspend refresh of DRAM array
• Clock switching during ISA cycles
• Low power consumption: 0.12 mW typical Suspend mode power
• Simultaneous multiple-voltage I/O pads operate at either 3.3 V or 5 V. Core operates at 3.3 V for minimum power consumption.
• Integrated memory controller
• Controls symmetrically addressable DRAM or asymmetrical 512 Kbyte × 8 bit or 1 Mbyte x 16 bit DRAM or SRAM as main memory
• Zero wait-state access with 70 ns, Page mode DRAMs
• Supports up to 16 Mbyte system memory
• Supports up to 16 Mbyte of application ROM/Flash, and 320 Kbyte direct ROM BIOS access. Also supports shadow RAM
• Fully PC/AT compatible
• Integrated PC/AT-compatible peripheral logic
• One programmable interval timer (fully 8254 compatible)
• Two programmable interrupt controllers (8259A compatible)
• Two DMA controllers (8237A compatible)
• Built-in real-time clock (146818A compatible), with an additional 114 bytes of RAM
• Internal Phase-Locked Loops (PLL) generate all clocks from single 32.768 kHz crystal input
• Bus configurations
• 16-bit data path
• Optional bus configurations: Internal LCD controller with subset ISA 386 Local Bus mode with subset ISA, Maximum ISA Bus mode
• Four programmable chip selects
• Built-in 8042 chip select
• Serial port controller (16450 UART compatible)
• Bidirectional parallel port with EPP
• Integrates two PCMCIA Version 2.1 slots
• Integrated CGA-compatible LCD controller
• Fully 6845 compatible
• 16 gray levels in Text mode; 2 or 4 levels in Graphics mode
• Supports the following LCD Panel Sizes: 320×240 single scan (2 bpp), 640×200 single/dual scan (1 bpp), 480×320 single scan (1 bpp)

• point-of-sale equipment
• web appliances
• industrial controls
• communication equipment