Batterry U40 - 2530/3540
Guys, could someone help with the correct pinout of the U40?
It is used on the 2530, 3540.
The doubt is pin 4, does it need 3.3v?
I have a schematic of one of them.
1/2 - GND
3 - Temp
4 - ??
5 - D
6 - CLK
7 - V+
Yes, it could be a power supply for eeprom chip. In this case this battery has i2c interface which is not supported.
Does the NLBA only work with SMBUS?
Presently yes. Latest firmware 1.15 already has low-level i2c support but there is no high-level support yet.
Also there are many varieties of i2c communication in the batteries depending on the pack maker. For example TI i2c chips could be read by their ev2300/ev2400 adapter and bqEVSW or bqStudio software. While others batteries like Fujitsu or Panasonic have different protocol.
You could try to read a battery by CH341A external eeprom reader.
Perfect. I'll leave the battery identification by the programs to help future users.
The last question. Is the CP212 Module different from the EV2300?
One is i2c and the other is SMBus interface, or am I getting confused?
Is the CP212 Module different from the EV2300?
One is i2c and the other is SMBus interface,
CP2112 - general purpose usb - smbus/i2c interface produced by Silabs for third-party developers
EV2300 - proprietary usb - smbus/hdq/i2c interface produced by Texas Instruments for their proprietary software