All About Battery connector pinout of mobile phone

what is - BTemp ?
[All About Battery connector pinout 4mgf)
It is used to measure the battery temperature.
The phone stops the charging, if the battery is starting to overheating. In case of NTC thermistor, if the temperature increasing, the resistance decreasing. The temperature of the battery make the resistance beetween the GND and the BTemp change.
There are batteries which don't have BTemp connector. In this case, the phone has a temperature meter close to the battery.



what is - BSI ?
[All About Battery connector pinout 4mgf)
Battery Size Indicator ( or Battery Status Indicator or Battery System Indicator )
Mobile phones use BSI to identify the type and size of the used battery. This is needed to determine the current and the voltage of the charging.
It is connected to resistor to GND. The phone measures the resistance of the BSI - GND connectors, and it can determine which kind of battery is in the phone.
Nokia NiMH batteries:
* BMC-2 640mAH 3.3 kOhm
* BMC-3 900mAH 5.6 kOhm
Nokia Li-Ion batteries:
* BLB-2 650 mAH 68 kOhm
* BLC-2 900 mAH 75 kOhm
There are some mobile phones, which has shorter BSI pin. It is because when the battery is being removed when the phone is turned on, the BSI circuit interrupts first, which tells the processor to shut down all communication to prevent damage.



what is - VBAT ?
[All About Battery connector pinout 4mgf)
Positive battery terminal.
Also known as
* VBATT
* VBAT+
* +



what is - VBUS ?
[All About FBus MBus cable connector pinout 4mgf)
* VBUS - VBUS, USB powerdetect



what is - VCC ?
[All About FBus MBus cable connector pinout 4mgf)
* VCC - Common collector voltage
Common Collector Voltage - main power supply ( usually 5V )



what is - FBUS ?
[All About FBus MBus cable connector pinout 4mgf)
* FBUS - FBUS data exchange protocol
Fast BUS
Bi-directional full duplex communication type. It uses the RS-232 standard.
Connectors used for communication:
* TX - Data send
* RX - Data reveive
* GND - Ground
FBUS cable is used for synchronizing phone user data, setting contrast, sending / reading operrator logo, ringtone etc...



what is - VPP ?
[All About FBus MBus cable connector pinout 4mgf)
* VPP - Programming power supply



what is - MBUS ?
[All About FBus MBus cable connector pinout 4mgf)
* MBUS - MBUS data exchange protocol
Data exhange protocol ( Half duplex ) It is used to flash Nokia phones.



what is - RX ?
[All About FBus MBus cable connector pinout 4mgf)
*RX - Data Reciver



what is - TX ?
[All About FBus MBus cable connector pinout 4mgf)
*TX - Data Transmitter



what is - GND ?
[All About FBus MBus cable connector pinout 4mgf)
*GND - Ground
Earth Connection