手机RF MIPI应用指导

对手机RF工程师及驱动工程师的MIPI基础指导

MIPI IntroductionTony Yang

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对手机RF工程师及驱动工程师的MIPI基础指导

Contents

- RFFE Specification - qMIPI difference with RFFE - qMIPI Application

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对手机RF工程师及驱动工程师的MIPI基础指导

RFFE Specification

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对手机RF工程师及驱动工程师的MIPI基础指导

Overview

MIPI– Mobile Industry Processor Interface RFFE– RF Front End Control Interface RFFE key pillars for the design are to:– Minimize wiring effort in front ends of mobile terminals– Minimize pin count– Ease and optimize control flow– Ensure minimal EMI contributions due to RFFE bus– Add flexibility and scalability to allow usage of multiple receivers and transmitters simultaneously

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对手机RF工程师及驱动工程师的MIPI基础指导

MIPI Interface and Bus Structure● VIO● SCLK● SDATA

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对手机RF工程师及驱动工程师的MIPI基础指导

RFFE Bus Configuration

● PA● Filter● LNA● Switch● Tuner● Power Manage● Temp Sensor

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对手机RF工程师及驱动工程师的MIPI基础指导

RFFE Frame Structure

Defined by USID

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对手机RF工程师及驱动工程师的MIPI基础指导

Slave Register SpaceRFFE has 16bit address register space, but mostly we only use 5bit address. Different address length register has different write/read command sequence.

Only introduced below

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对手机RF工程师及驱动工程师的MIPI基础指导

Slave Register Mapping

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对手机RF工程师及驱动工程师的MIPI基础指导

Register Write Sequence

Total number of bits is odd

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对手机RF工程师及驱动工程师的MIPI基础指导

Register Read Sequence

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对手机RF工程师及驱动工程师的MIPI基础指导

PM_TRIG RegisterPM_TRIG= PM+ TRIG

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对手机RF工程师及驱动工程师的MIPI基础指导

Power Modes

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对手机RF工程师及驱动工程师的MIPI基础指导

Trigger Modes- Trigger load multiple registers at the same time - Trigger Mask disable the trigger - SWKS switches default trigger enabled

Write 0x07, trigger all Write 0x38, disable all triggers

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对手机RF工程师及驱动工程师的MIPI基础指导

XXX_ID

Defined by vendors

Assigned by MIPI Alliance SWKS is 0x0A5

Assigned by MIPI Alliance SWKS is 0x01

Defined by vendors

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对手机RF工程师及驱动工程师的MIPI基础指导

SID

USID= Unique Slave ID

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