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KB3001
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re: London Calling: Sony set to make Raspberry Pi
KB3001   9/11/2012 9:28:33 AM
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It's anything but vapourware! I think we should all support such initiatives as they have the potential to inspire generations who might not be inclined or financially able to join our community.

Peter Clarke
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re: London Calling: Sony set to make Raspberry Pi
Peter Clarke   9/11/2012 7:53:43 AM
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I am not sure why you think such things are vaporware as they have been on sale for some time. In fact that highlights a reason to purchase Raspberry Pi or Mbed; lower price.

Roger3
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re: London Calling: Sony set to make Raspberry Pi
Roger3   9/10/2012 6:55:27 PM
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Why spending time in something that you cannot purchase to put in your product ? This is vaporware. Try Linux Stamp ( http://www.thelinuxstamp.com/ ) Use Atmel, you can purchase the chips right in the corner; Datasheets ? Get full datasheets at atmel.com.

betajet
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re: London Calling: Sony set to make Raspberry Pi
betajet   9/10/2012 3:10:16 PM
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Let me try those links again. The parentheses created confusion. http://www.ti.com/tool/ek-lm4f120xl http://www.element14.com/community/community/knode/dev_platforms_kits/element14_dev_kits/kinetis_kl2_freedom_board

betajet
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re: London Calling: Sony set to make Raspberry Pi
betajet   9/10/2012 3:06:44 PM
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RasPi is a terrific GNU/Linux platform for the price, with a strong developer community. However, GNU/Linux is in many ways a mainframe operating system and programming down at the bare metal can be challenging, especially since the BCM2835 documentation is limited. For bare-metal real-time development, here are a couple of interesting new boards to be available later this month: Texas Instruments Stellaris® LM4F120 LaunchPad Evaluation Board (http://www.ti.com/tool/ek-lm4f120xl) with a promotional price of US$4.99. The processor is an 80 MHz Cortex-M4F with DSP instructions, FLOATING POINT, 256KB Flash, and 32KB SRAM. Freescale Freedoom Kinetis KL25Z development board (http://www.element14.com/community/community/knode/dev_platforms_kits/element14_dev_kits/kinetis_kl2_freedom_board) for US$12.95 with 48 MHz Cortex-M0+, 128KB Flash, and 16KB SRAM.

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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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