Rockbox General > Rockbox General Discussion
work on best low cost mp3 player for rockbox
wodz:
No BGA seems strange for me. Mass production using BGA chips is actually cheaper, PCB can be of higher density etc. etc. BGA may be hard for hobbiests but this is really industrial starndard for something like 15 years now.
ATJ213x is capable enough to run rockbox. I am working on the port for this platform but my spare time is very limited nowadays.
hunterleo:
BGA is not a big problem. However, it increased the defect rate of the device, if my manufacturer wasn't wrong about it. Ingenic 4760 costs about $50 for just the chip. It is too expensive for a low cost player.
ATJ213x's biggest problem is the power consumption which is about 32mA per hour for music playback. ATJ2127 is about 12mA per hour.
wodz:
When I did research for my hobby project, imx233 from Freescale was the most cost effective solution (pamaury mentioned it already) BUT I considered only chips available is single pieces in Europe.
I am not contesting provided power consumption numbers (as I don't have proper documentatin) BUT SoC consumes usually only tiny fraction of whole system power draw. At what conditions provided consumption was measured?
hunterleo:
--- Quote from: wodz on November 02, 2015, 09:22:40 AM ---When I did research for my hobby project, imx233 from Freescale was the most cost effective solution (pamaury mentioned it already) BUT I considered only chips available is single pieces in Europe.
I am not contesting provided power consumption numbers (as I don't have proper documentatin) BUT SoC consumes usually only tiny fraction of whole system power draw. At what conditions provided consumption was measured?
--- End quote ---
The test result is Chinese. I tried to translate it into English.
ATJ2137:
Original OS , LCD 1.8 TFT, battery 3.8V, volume level 24 music playback ,screen on, 52mA
Original OS , LCD 1.8 TFT, battery 3.8V, volume level 24 music playback ,screen off, 32mA
ATJ2127
Original OS , LCD 1.8 TFT, battery 3.8V, volume level 24 music playback ,screen on, 22mA
Original OS , LCD 1.8 TFT, battery 3.8V, volume level 24 music playback ,screen off, 12mA
I will look into imx233 from Freescale which I wasn't familiar with. Thanks a lot.
ZincAlloy:
Low power consumption sure is the strong point of the ATJ2127. Is that only possible because it has rather limited possibilities?
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