SPRZ455F December 2020 – February 2025 DRA829J , DRA829J-Q1 , DRA829V , DRA829V-Q1 , TDA4VM , TDA4VM-Q1
I3C: SDAPULLEN drives low instead of Hi-Z
The SDAPULLEN pin incorrectly drives low instead of Hi-Z when the I3C interface is operating in push-pull mode. This erroneously pulls the SDA pin low via the external active strong pull resistor between SDAPULLEN and SDA.
An external circuit should be used to connect an active strong pull up resistor from SDA to VDD when SDAPULLEN is high and to disconnect the pull-up resistor from SDA when SDAPULLEN is low.
Figure 3-4 shows an example implementation of the Workaround.
Figure 3-4 I3C SDAPULLEN Block Diagram