LM4853

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Neo FreeRunner

Main article: Neo_FreeRunner_GTA02_Hardware


  • Connected to this chip:
    • Samsung S3C2442B B54 GPIO: HP_IN, AMP_SHUT (shutdown);
      • GPJ1 == 0, headphone or speaker is enabled. GPJ1 ==1, amp is off.
      • GPJ2 == 0, select speaker; GPJ2 == 1, select headphones.
    • Wolfson WM8753: LOUTL (LEFTIN), LOUTR (RIGHTIN);
    • speaker4102: (LEFTOUT/BLTOUT-, BLTOUT+);
    • headset-jack: ring 2 (RIGHTOUT), ring 3 (LEFTOUT/BLTOUT-) via 1uF-33R each
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Neo FreeRunner

Main article: Neo_FreeRunner_GTA02_Hardware


  • Connected to this chip:
    • Samsung S3C2442B B54 GPIO: HP_IN, AMP_SHUT (shutdown);
      • GPJ1 == 0, headphone or speaker is enabled. GPJ1 ==1, amp is off.
      • GPJ2 == 0, select speaker; GPJ2 == 1, select headphones.
    • Wolfson WM8753: LOUTL (LEFTIN), LOUTR (RIGHTIN);
    • speaker4102: (LEFTOUT/BLTOUT-, BLTOUT+);
    • headset-jack: ring 2 (RIGHTOUT), ring 3 (LEFTOUT/BLTOUT-) via 1uF-33R each