Check the device-specific data sheet for appropriate voltage input levels to latch a high or low signal level. The terminal functions tables in the data sheet specify the operating I/O supply voltage for each signal. Example DSP_LDO_EN input signal uses the LDOI supply voltage. A value of LDOI (or greater than the VIH of LDOI, 0.7 * LDOI voltage) is required to latch a high state.