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  • Forum Post: Re: 20Z75 breakdown after I connect it with MSP430's SMbus

    SW5307
    Leonardo, I think most likely you have a timing issue. The best approach to me is to first thoroughly read the SMBus communication specification, which you could download from http://smbus.org/ Then to establish confidence with your communication routine, you could use an oscilloscope to monitor...
    on Sep 4, 2009

  • Forum Post: problems with i2c access to the bq27501

    Ben Wu
    I'm trying to get the software written for accessing the bq27501 chip through i2c. The datasheet information regarding the i2c interface isn't very good, however, slua467a.pdf that seems to help. The problem I'm having is that I'm not able to read the chip firmware version (or anything...
    on Nov 10, 2009

  • Forum Post: bq77pl900

    Larry Shilkoff
    I'm trying to use the evaluation software to exercise the bq77pl900 battery protector. I haven't been able to get the chip to respond to the software. I can see the I2C signals on the comm line, and the clock and data are on the correct lines. I'm delivering ~8 vdc to pin 9 (Batt). According...
    on May 11, 2010

  • Forum Post: Re: Example I2C code for the BQ27510

    dMax
    We now have an app note with sample C code for the MSP430 to demonstrate communication with our single-cell fuel gauges (using I2C and HDQ). It also has examples for communicating with our authentication ICs (using HDQ and SDQ). You can find it in the Application Notes section of the product folders...
    on May 13, 2010

  • Forum Post: changing bq2060A SMBus ID adress

    Stefan 50900
    Hello, is it possible to change the SMBus ID adress ? I need to use up to 5 batteriepacks, each equipped with the bq2060A, in parallel circuit and want to transfer the battery data of each battery via one SMBus to the PC. Thanks for helping! Stefan
    on May 28, 2010

  • Wiki Page: Sample C code available for single-cell fuel gauges and battery authentication ICs

    Antonio Fadhel
    Sample C code available for single-cell fuel gauges and battery authentication ICs by 317599 We have a new app note online (SLVA413) which has sample C code for the MSP430 platform that you can use to talk to many of our single-cell fuel gauges as well as our battery authentication ICs. It includes...
    on Jul 12, 2010

  • Forum Post: BQ27510 - write data flash

    Victorien v
    hello, I'm developping a driver in C language to control a fuel guage BQ27510. I have no problem to read the standard/sub/extend command and to write the standard command. but I can't write data on "data flash" with the extend command. the function is this one : if(!(FuelGauge_WriteExtendedCmd...
    on Aug 3, 2010

  • Forum Post: Re: Interfacing BQ77pl900 with MSP430f1611

    WM5295
    From a hardware perspective there are a number of things to check, likely with a scope: Is the bq77PL900 awake, out of reset and have FETs on so there is a non-zero status to read? Is VLOG supplied? When the code is run, do the I2C lines toggle at the VLOG level, or at all? Is the resulting...
    on Sep 2, 2010

  • Forum Post: Re: BQ27541 hanging the I2C bus

    Ming Yu
    Shaheen, What is the hardware die rev on these bq27541 devices? you can send command 0x0003 and read back from control register the HW version What is the host I2C speed? The difference between bq27541-V200 and bq27541 is firmware upgrade and the change list should be on the website. ...
    on Nov 16, 2010

  • Forum Post: Writing DFI File at production.

    Jose14510
    Hi, I have a bq27510 EVM and an MSP430 microcontroller connected via I2C. I have succesfully communicated to the gauge and have read values such as control status, flags, temperature, voltage, etc. On the other side, I have generated a DFI file for the cells I'm planning to use using the...
    on Nov 24, 2010

  • Forum Post: Will the bq77PL900 talk over I2C with an MSP430F2272?

    Scott Brenneman
    I don't have hardware yet, so I can't try this out, but reading the datasheets I see an apparent incompatibility between the bq77PL900 and the MSP430 in the area of the I2C interface. The bq77PL900 says that it doesn't send ACKs, but the MSP430 appears to require them and reacts when it doesn't...
    on Dec 10, 2010

  • Forum Post: BQ27541 I2C Question

    Bill Zimmermann
    The BQ27541 datasheet recommends 10K for the pullup resistors for the I2C clock & data pins. In the timing specifications for the I2C bus, the max risetime spec is 300 nS. With 10K pullups, in my application the rise time is around 4 uSec. How important is it to meet the risetime specification (assuming...
    on Feb 14, 2011

  • Forum Post: BQ24765 - Not responding on SMbus - No acknowledgment When trying to read using SMbus

    Rizwan Hirani
    Hi There, This is regarding BQ24765 battery charger IC. In one of our custom design we are using BQ24765 as batterty charger to charge 14.4V Li ION battery. It is observed that , battery tries to send commands to battery charger IC @ the adress b'0001 001_ , but there is no acknowledged. ...
    on Mar 14, 2011

  • Forum Post: BQ2415X - Exiting Hi Z Mode

    Tyler Pate
    Q: Once the device (BQ24153A, BQ24156A, BQ24158) exits the standard path on the operational flow chart (pg. 15 in datasheet) and enters the high impedance mode, how does one return the device to normal operation?
    on Mar 22, 2011

  • Wiki Page: BQ2415X - Exiting Hi Z Mode

    Tyler Pate
    Q: BQ2415X - Exiting Hi Z Mode Q: Once the device (BQ24153A, BQ24156A, BQ24158) exits the standard path on the operational flow chart (pg. 15 in datasheet) and enters the high impedance mode, how does one return the device to normal operation? A: You must perform an I2C write or power cycle the...
    on Mar 22, 2011

  • Forum Post: BQ2415X: Application & Removal of VBUS, effect on IC State

    Tyler Pate
    Q: What happens if VBUS is applied, then removed and VSCOUT is at first above the VLOWV but then drains below it? If I then reapply VBUS, will it start charging or will it stay in Hi Z mode?
    on Mar 22, 2011

  • Wiki Page: BQ2415X: Application & Removal of VBUS, effect on IC State

    Tyler Pate
    Q: BQ2415X: Application & Removal of VBUS, effect on IC State Q: What happens if VBUS is applied, then removed and VSCOUT is at first above the VLOWV but then drains below it? If I then reapply VBUS, will it start charging or will it stay in Hi Z mode? A The IC will not enter the battery...
    on Mar 22, 2011

  • Forum Post: Bq27510 communications problem

    Kenneth Tait
    Hi all, I'm trying to bring up a BQ27150 design. I have most of it working. I can issue all the normal commands fine over I2C. I can't seem to get the CNTL with Subcommand to work at all. i get back spurious bytes, no real pattern. I'm using the slua467A.pdf app note as a guide. I2C...
    on May 9, 2011

  • Forum Post: Re: Using I2C driver for SMBus communication

    Viktoriya Sherman
    SMBus has a timeout specification that is not required by the I2C. Most of the time you can use I2C to communicate with the SMBus without issues so we recommend to do a scope capture of the failed communication and look at the waveform to see what isn't meeting the SMBus spec and update the code...
    on May 27, 2011

  • Forum Post: Re: Using I2C driver for SMBus communication

    Viktoriya Sherman
    Michael, It sounds like it is sending a double start. Our part may sometimes communicate correctly in the case of a double start, but to ensure that it communicates it is better to not have a double start if that can be handled in your vhdl file. Regards, Viktoriya
    on May 31, 2011

  • Forum Post: I2C with EV2300

    Dimitri Marquois
    Hello, I am trying to send I2C data frame with EV2300 to communicate with a PCA 9536 : (Please visit the site to view this file) The frame is like this 0x01 0x00 0x00 0x020 0x82 0x01 0xFE I have the source code in VB of BQTESTER. I try some function: Bq80xRW1.ReadI2CBlockOnSMB Bq80xRW1.I2CWriteBlock...
    on Jun 20, 2011

  • Forum Post: Re: I2C with EV2300

    Dimitri Marquois
    This means that EV2300 it's only works with BQ20z ? We can't communicate with other componant ?
    on Jun 23, 2011

  • Forum Post: Re: I2C with EV2300

    Dimitri Marquois
    On the EV2300 there are a I2C connection. Do you have some library to use it ?
    on Jun 24, 2011

  • Forum Post: Re: I2C with EV2300

    Dimitri Marquois
    Hi, Yes, I tested functions, but is not matching with my need. Bq80xRW1.I2CWriteBlock has a special data frame which start with aa and end with 55. I want send data: 0x01 0x00 0x00 0x020 0x82 0x01 0xFE
    on Jun 27, 2011

  • Forum Post: Re: I2C with EV2300

    Dimitri Marquois
    I tested with the EV2300 the I2C connection, and I have nothings on the oscilloscope. Data are all send through the SMB connection. Do I need to send a command to the EV2300 to configure it in I2C mode ?
    on Jun 27, 2011
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