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SN65LVCP114: Question about registser descriptions on SN65LVCP114

Tony(JY) Jung
Prodigy 560 points
Part Number: SN65LVCP114

Hi Team,

I have some questions about SN65LVCP114 as follows. Would you please verify it as soon as possibe?

1. In the I2C mode, the default value of Reg0x00 is 00h. 

     When we changed bit7 value to bit '1' from '0'  (to GPIO control), does this device be reflected to GPIO configuration as soon as the bit changing from 0 to 1 ? or need to any special sequence to be reflected to GPIO configiraiton?  

2. Regarding Reg0x0F default value, the default value is 0x11 on datasheet. But when we read out the register value, the value is 0x01. Is it correct?  What is the normal default value for this registesr even though this register value is RSVD.  I would like to konw what is difference between 0x11 and 0x01.

Thank you for your support in advance.

B.R

Tony

  • 0
    TI__Mastermind 23815 points

    Hi Tony,

    When you change register 0x00 from GPIO to I2C or vice-versa, the port selected will change.

    For example, if the device is configured in I2C mode, in I2C is selected PORT B and in GPIO is selected PORT A, then if you change configuration to GPIO, the selected port will change to PORT A.

    Regarding register 0x0F, it is a reserved register you don;t have to worry about the values there.

    Regards