66AK2L06
SPRS930 –APRIL 2015
www.ti.com
11.31.7.1 IEEE 1149.1 JTAG Compatibility Statement
For maximum reliability, the 66AK2L06 device includes an internal pulldown (IPD) on the TRST pin to
ensure that TRST will always be asserted upon power up and the device’s internal emulation logic 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 device after powerup and externally drive TRST high before attempting any
emulation or boundary scan operations.
292 66AK2L06 Peripheral Information and Electrical Specifications Copyright © 2015, Texas Instruments Incorporated
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