| LH7A400 ARM-based multimedia system-on-chip |
[Vendor: Sharp Microelectronics]
The LH7A400, a 200-MHz system-on-chip (SOC) with ARM922T core, offers high performance at the lowest power consumption available. Applications span a wide range, including: wireless handheld gaming devices, SmartPhones, PocketPCs, home entertainment controllers, web-tablets, point-of-sale devices.
The LH7A400 provides the right balance between performance/features and cost/power consumption.
To provide high performance, the LH7A400 integrates a 200MHz ARM922T core (ARM9TDMI, 8KB Instruction Cache, 8KB Data Cache, MMU, Write-Back Buffer) with a processing speed of about 220 Million Instructions Per Second (MIPS). The 80KB of on-chip frame buffer allows a 160x240 16-bit image to reside on-chip reducing power consumption and optimizing system bandwidth. System bandwidth is further optimized by the on-chip 10-channel DMA engine.
To provide high integration and reduce cost, the LH7A400 integrates a host of functionality to lower total chip count. The programmable LCD controller supports up to 1024x768 resolution, up to 64,000 colors and 15 gray shades allowing direct interface to STN, Color STN, TFT, Sharp's Highly Reflective & Advanced TFT. For storage and expandability, The LH7A400 provides glue-less interface to SRAM/SDRAM/Flash devices, MMC, PCMCIA/CF and Smart Cards. For communication, the LH7A400 provides serial as well as parallel interfaces (USB, UARTs, Synchronous Interfaces, and AC'97 Codec Interface). The LH7A400 has also a special Watchdog timer to protect the overall system.
To reduce power consumption and increase battery life, the LH7A400 balances performance (200 MHz) with very low leakage current (25uA). This is accomplished by a programmable on-chip PLL and a flexible power management unit that provides the system designer total control over the activities of each function on the LH7A400.
Summary of features . . . - ARM922T core
- 32-bit ARM9TDMI[tm] RISC core
- 8KB instruction cache and 8KB data cache
- Memory Management Unit (MMU)
- 80KB on-chip memory
- External memory interface to SDRAM, Flash (Asynchronous, Synchronous & StrataFlash, ROM and SRAM
- Programmable color LCD controller with 800x600 resolution, up to 64K direct colors, 15 gray shades, and support for STN, Color STN, HR-TFT, TFT, and DMTN
- Compact Flash/PC-card interface
- MultiMediacard interface
- Smart Card Interface (ISO7816)
- AC97 Codec interface
- Smart battery monitor interface
- 3 UARTs, Device USB (1.1), synchronous serial communications interfaces
- 10-channel DMA, programmable interrupt controller, watchdog timer, four counters/timers, real-time clock
- Low-power modes including active, standbyand stop
- 256-pin chip scale package
Development and Debugging Support
LH7A400 customers will be able to draw from the extensive array of software development tool kits available for the ARM9TDMI(TM) from Advanced RISC Machines (ARM) Ltd. and many third party sources, and use Sharp's own hardware development tool kit and evaluation board for prototyping and expediting applications development. Designers can plug in their custom hardware, experiment with different kinds of memory, and evaluate the chip's performance quickly without having to make their own boards.
Sharp's recent announcement of a strategic relationship with Lineo for embedded Linux support will soon be followed with additional support for operating systems such as Microsoft's Windows CE 3.0 and Windows CE .NET operating systems.
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