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Hello,
I have a question with internal pull-ups for PSoC 4 device (CY8C4014FNI-421AT). As per datasheets it can be seen that I can enable internal I2C 5.6 KOhms weak pulls ups through the below commands in firmware.
SCB_scl_SetDriveMode(SCB_scl_DM_RES_UP);
SCB_sda_SetDriveMode(SCB_sda_DM_RES_UP);
Can you please advise whether using internal resistors on I2C data & clock lines provides similar performance as that of the external pull-ups and we can eliminate the use of external pull-ups to save space in the design?
Best Regards,
Nandhini Jayapandian
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PSoC 4 Architecture
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Hi Nandhini,
The i2c waveforms mary vary during the communication as the tolerance values of the internal resistances are high. So, we recommend you to go with the external pull-ups.
Regards,
Swathi
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Hi Nandhini,
The i2c waveforms mary vary during the communication as the tolerance values of the internal resistances are high. So, we recommend you to go with the external pull-ups.
Regards,
Swathi