Microprocessor for low-power, battery-operated TFT-display solutions with Linux

1st February 2008
Written by : ES Admin
Microprocessor for low-power, battery-operated TFT-display solutions with Linux
Renesas Technology Europe has announced the immediate availability of the SH7721 microprocessor for battery-operated devices that use TFT displays and feature-rich Linux user interfaces. The SH7721 SH-3-based microprocessor has 170 DMIPS performance, 32Kbyte unified cache and a five-stage pipeline. It integrates a TFT-controller with up to 1024x1024 resolution, depending on colour depth, and with an associated dedicated 2.4Kbyte line-buffer RAM to prevent flickering.
Further support for state-of-the-art user interfaces includes an Analog-to-Digital-Converter (ADC) that can be used for touch-screen control. The device also features USB host/function and many serial ports including two UARTS with 128 Byte FIFO, IIC, Multi-media card-Interface (MMC), Smartcard-Interface, IrDA and others.

The peripheral set is completed by many timers including a Real-Time-Clock (RTC) and a PCMCIA 2.1 – compliant PC-Card Controller (PCC) to enable easy extension of the system using readily available PCMCIA cards. Finally a flexible Bus-State-Controller (BSC) enables direct connection to Flash, RAM and SDRAM. A six-channel DMA offloads the CPU from data movements.

To facilitate long battery live or USB-powered operation, the SH7721 only consumes 600mW when everything is in full operation and at full speed. The power consumption can be further reduced using clock gearing and low-power modes such as sleep and standby. For example, in standby mode and with the RTC maintained, the device consumes only 50uA (max).

The SH7721 is now available in two RoHS compliant 256-pin BGA package. The packages measure only 11x11mm for extremely compact telecoms applications, or 17x17mm for less space-constraint consumer/industrial applications. The device is supported by a reference platform (MS7721RP01), which is available ex stock and supported by Renesas Technology’s popular E10A debugger (HS0005KCU01H without trace, HS0005KCU02H with trace).

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