Idle Configuration Process - Texas Instruments OMAP5910 Reference Manual

Figure 105. Idle Configuration Process
12.3.2.3 Valid Idle Configurations
12.3.2.4 Key Conditions to Change Idle Configurations
SPRU890A
Idle configuration register (ICR)
Idle status register (ISTR)
EMIF
domain
Not all of the values that you can write to the idle configuration register (ICR)
provide valid idle configurations. The valid configurations are limited by
dependencies within the system. For example, the EMIF domain should not
be idled when the DSP core is executing instructions from DSP external
memory.
Before you use the IDLE instruction, ensure that there is a method for the DSP
to change the idle configuration afterward. Table 97 summarizes the methods
available under two key conditions. For each condition there are two methods
for changing the idle configuration, A and B. The effects of each method on the
idle idle status register (ISTR) and the idle configuration register (ICR) are also
detailed. For more details about these idle registers, see section 12.3.2.8.
DSP Subsystem Reset, Clocking, Idle Control, and Boot
Copy initiated by IDLE instruction
CACHE
domain
DMA CPU
domain domain
DSP Subsystem 221