Zitat
Original geschrieben von kab
Also nur ein USB-Stecker ? Ob da die Navi Stimme übertragen wird?
Kannst Du darüber z.B. mp3 Sound etc. hören?
Ich kann damit ALLES hören,
einschliesslich des Gebimmels, wenn mich einer anruft.
Aber - wie schon weiter oben gesagt - ich habe kein A780, sondern ein V3.
Thema USB-Buchse:
Das ist bei Motorola eben nicht nur eine USB-Buchse, sondern viel mehr.
Eine auszugsweise englische Beschreibung
für das V3
hänge ich hier mal an, dann wird das klar.
---- schnipp ----
Acronyms and Abbreviations
USB Universal Serial Bus
EMU Enhanced Mini USB
PPD Phone Powered Device
SPD Self Powered Device
SE1 Singled Ended 1
ISR Interrupt Service Routine
Pin
Signal
Description
1
VBUS
Supplies power to the radio from SPD’s.
Acts as SW_B+ for PPD’s.
Used in SPD detection
2
D+
Used for device identification.
Acts as D+ for USB mode,
UART RXD in UART mode
MIC_IN in audio mode
SPKR_R in stereo mode
3
D-
Used for device identification.
Acts as D- for USB mode,
UART TXD in UART mode
SPKR_OUT in audio mode
SPKR_L in stereo mode
4
ID
Device identification.
Acts as MUTE to SIHF (controlled by SNP_INT_CTL)
Acts as SEND/END for headset
5
GND
Ground
The EMU bus allows charge current to be supplied by the VBUS pin. Supported VBUS sources will be Motorola Chargers, CEA-936 compliant Car-kits, USB hosts, or a factory mode supply. The charger path will be a dual-path topology with a hardware controlled discharge lockout when connected to a USB host prior to software charge current negotiation.
A Fast-Rate Charger (>1Amp capability) and a Mid-Rate Charger (>450mA capability) will be standard Motorola EMU accessories. Razor will charge from either of these charger types once they are identified as being valid. Validity will be based on a valid USB_ID value as well as a valid voltage range (4.7V-5.25V). Both will be treated as a Standard Charger in RX due to power dissipation constraints. If charger is invalid, software will not charge. EMU Chargers are not compatible with P2k or LCA.
A Factory Mode can be entered by applying VBUS voltage to the USB_ID pin. The purpose of Factory Mode is to allow power-up to occur without a battery.
When VBUS is supplied by a USB host, hardware detection will default charger to off until SW powers up and negotiates 500mA with host. If 500mA is negotiated, software will begin to charge battery. If 500mA is denied, then charging will not occur and the USB host will be treated as a data cable only.
The Radio will also have the capability to supply a switched B+ supply to VBUS originating from the battery. This supply will allow phone powered accessories to receive power from the phone.
Communication (USB/RS232)
Along with the standard USB communication between a phone and a host, another UART based protocol will also be supported. This protocol will allow a phone to communicate with a CEA-936 compliant device without the expense of requiring it to be a USB Host.
A/D Thresholds - used for ID-dedection
The table below shows the A/D thresholds used for device identification.
Since a resistor value depicts different accessories depending on context, only the resistor value is shown.
Self-Powered-Device classes are:
1. USB Host devices which include
a. Standard USB Cable
b. Factory Mode USB
c. Software regression USB
2. Chargers including
a. Fast charger
b. Mid rate charger
c. MPx Chargers
3. Dumb self powered audio devices (Fast and mid rate SIHF)
4. Smart self powered UART device
a. Smart Audio devices
b. Other smart devices
Phone-Powered-Device device classes are:
1. USB OTG devices (outside the scope of this document)
2. Dumb PPD’s (Headset, Quill)
3. Smart phone powered devices
a. Smart phone powered audio device (eg FM Radio)
b. Other smart phone powered devices
Device Handling
Following are the descriptions of the different modes/devices and the types of messages that should be generated between components. These descriptions can be used for the design and implementation of any new messaging required.
USB CABLE:
Once a USB cable has been identified by rtime the following events should occur:
Note: If the user attaches a charger very slowly there is a chance it will be ID’d as a USB cable.
Due to this issue rtime should continue to poll for an SE1 until the radio has enumerated.
Mini-USB Male - look into plug-side
+--200k--+ +-------+ 5,2V= Charger 220V~
GND Button Mikro Speak + Headset Pinout
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