Can the NTAG 5 have internal pull-up resistors when acting as an I2C Master?

cancel
Showing results for 
Search instead for 
Did you mean: 

Can the NTAG 5 have internal pull-up resistors when acting as an I2C Master?

285 Views
cory1
Contributor II

I have reviewed the datasheet and the application notes for the NTP5332. When the device is configured to use the GPIO pins, it can support 2kΩ weak pull-up resistors. When the device is configured as an I2C Master all the documentation recommends the user add external pull-up resistors to the SDA/SCL lines. Why is that?

Can anyone point me in the direction of a document that describes how to enable internal weak pull-up resistors on the SDA/SCL lines?

Labels (1)
0 Kudos
2 Replies

227 Views
fangfang
NXP TechSupport
NXP TechSupport

Hello,

>>When the device is configured as an I2C Master all the documentation recommends the user add external pull-up resistors to the SDA/SCL lines. Why is that?

For the information please refer to the user manual https://www.nxp.com/docs/en/user-guide/UM10204.pdf .

 

>>Can anyone point me in the direction of a document that describes how to enable internal weak pull-up resistors on the SDA/SCL lines?

Depends on the datasheet, "weak pull-up resistors" is only for GPIO, not for I2C.

pastedImage_2.png

Hope it help you. Have a nice day.

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!
- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-----------------------------------------------------------------------------

0 Kudos

227 Views
cory1
Contributor II

So you are saying that the user cannot enable internal pull-up resistors on the SDA and SCL lines? The board must have external pull-up resistors?

0 Kudos