SPRS841E March 2012 – October 2019 TMS320C6652 , TMS320C6654
PRODUCTION DATA.
For maximum reliability, the C6654 and C6652 DSP includes an internal pulldown (IPD) on the TRST pin to ensure that TRST will always be asserted upon power up and the internal emulation logic of the DSP will always be properly initialized when this pin is not routed out. JTAG controllers from Texas Instruments actively drive TRST high. However, some third-party JTAG controllers may not drive TRST high but expect the use of an external pullup resistor on TRST. When using this type of JTAG controller, assert TRST to initialize the DSP after power up and externally drive TRST high before attempting any emulation or boundary scan operations.