SPRSP85A April 2024 – September 2024 TMS320F28P550SJ , TMS320F28P559SJ-Q1
PRODMIX
Refer to the PDF data sheet for device specific package drawings
GPIO2, GPIO3, GPIO9, and GPIO32 are 5V Fail-Safe (5V FS) pins on this device. This means two things:
In order to achieve the above characteristics, the construction of the input buffer of these GPIOs is different from the other GPIOs on this device. As such, there is both an additional leakage current parameter defined (unpowered leakage), and a behavioral difference for the powered leakage current when the device is powered. Figure 6-1 shows the typical leakage current profile for these pins. As shown in the figure, there is an increased leakage current present as the voltage on the pin exceeds the device's supply (VDDIO) voltage. It is during this transition phase that the highest leakage current is observed. Once the input pin voltage is greater than approximately 4V, the current settles to a nominal value through the remainder of the input voltage range.