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RCU Functional Description
RCU Functional Description
This section provides information on the function of RCU module.
Hardware reset using SYS_HWRST pin
Asserting the SYS_HWRST pin resets all functional units, except the real time clock (RTC) (if present).
Hardware reset through RCU
The RCU can perform a full system reset which can be initiated through hardware blocks like the SEC, the
TRU, and the oscillator watchdog.
Software reset using RCU registers
Setting the RCU_STAT.SWRST bit issues a software reset for all system units except the RTC module and
RCU_BCODE,
RCU_CRCTL
Core reset RCU registers
A core can be individually reset by software, or by setting the RCU_CRCTL.CR[n] bit.
ADSP-SC58x RCU Register List
The Reset Control Unit (RCU) controls how all the functional units in the processor enter and exit Reset. Differen-
ces in functional requirements and clocking constraints exist (units in different clock domains have to enter reset
asynchronously, but units exit reset in a deterministic way), and these differences define how reset signals are gener-
ated. Reset signals propagate through all functional units asynchronously. For more information on RCU function-
ality, see the RCU register descriptions.
Table 6-1: ADSP-SC58x RCU Register List
Name
RCU_BCODE
RCU_CRCTL
RCU_CRSTAT
RCU_CTL
RCU_MSG
RCU_MSG_CLR
RCU_MSG_SET
RCU_SIDIS
RCU_SISTAT
6–2
and
registers.
RCU_STAT
Description
Boot Code Register
Core Reset Outputs Control Register
Core Reset Outputs Status Register
Control Register
Message Register
Message Clear Bits Register
Message Set Bits Register
System Interface Disable Register
System Interface Status Register
ADSP-SC58x/ADSP-2158x SHARC+ Processor Hardware Reference
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