ZHCSGV2J June 2009 – January 2017 OMAP-L138
PRODUCTION DATA.
A warm reset provides a limited reset to the device. Warm Reset is initiated by bringing only RESET low (TRST is maintained high through a warm reset). Warm reset sets certain portions of the device to their default state while leaving others unaltered. All pins are tri-stated with the exception of RESETOUT which remains active through the reset sequence, and RTCK/GP8[0]. If an emulator is driving TCK into the device during reset, then RTCK/GP8[0] will drive out RTCK. If TCK is not being driven into the device during reset, then RTCK/GP8[0] will drive low. RESETOUT is an output for use by other controllers in the system that indicates the device is currently in reset.
During an emulation, the emulator will maintain TRST high and hence only warm reset (not POR) is available during emulation debug and development.
RTCK/GP8[0] is maintained active through a warm reset.
A summary of the effects of Warm Reset is given below: