Changes between Version 5 and Version 6 of Android/Qualcomm/MsmChipsets


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Timestamp:
09/11/10 15:26:44 (7 years ago)
Author:
tj
Comment:

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  • Android/Qualcomm/MsmChipsets

    v5 v6  
    1717I^2^C is a two-wire bus for communications between integrated circuits. These are usually off-chip (not integrated into the SoC) devices. MSM typically uses them for keyboard, touch-pad, micro-controller,[[BR]]memory, Liquid Crystal Display (LCD) driver and stereo sound. Typically the devices do not need to high speeds nor to move large amounts of data or commands. 
    1818 
     19=== Single Wire Serial Bus Interface === 
     20The Single-wire Serial Bus Interface (SSBI) is similar to I^2^C but it combines power and data on a single wire. The clients incorporate a small capacitor to store charge when the master has put the wire into data mode. Unlike I^2^C though, it is a point-to-point interface (only ever two devices connected by it). 
     21 
    1922== Inter-Processor Communication == 
    2023The radio micro-processor is in command of the entire system. It can and  does prevent access to some core hardware and services by the apps  micro-processor. It also provides several  methods for the apps  processor to communicate with it using Inter Processor Communications (IPC). The methods vary based on the  objective  of the communication.