Figure 3-27 shows the power-on reset sequence of the DSP2 subsystem.
The power-on reset to DSP2 is applied when PD_DSP2 is powered. The assumptions ofter power-on reset assertion are:
- PD_DSP2 is on.
- The PRCM module provides DSP2_GCLK functional clock to the DSP subsystem, and it has been enabled by MPU software control.
The Power-On Reset sequence is:
- Software clears the RM_DSP2_RSTCTRL[1] RST_DSP2 bit. This causes the PRCM module to release the DSP2_PWRON_RST used inside DSP2 mainly to reset the emulation logic and the DSP2_RST used to reset all logic inside DSP2. Then software can download data into TCM memory while keeping the CPU under reset.
- When the memory is initialized, software clears the RM_DSP2_RSTCTRL[0] RST_DSP2_LRST bit. This release DSP2_LRST to the local CPU inside DSP subsystem.