26.2.1.2 Control Functions
There are three commands for control functions, PTGCTRL,
                PTGADD and PTGCOPY. The PTGCTRL
            command controls the operation of the delay timers, software triggers and the strobe
            output. The PTGADD command is used to add the contents of the PTGHOLD
            register to other PTG registers, including the counters, timers, Step Delay and Literal
            register. The PTGCOPY command is used to copy the contents of the
            PTGHOLD register to other PTG registers, similar to the PTGADD
            command.
