Instruction Register

Views Updated: Dec 15, 2025

Abbreviation

Pronunciation

/ˌɪnˈstrəkʃən ˈrɛʤɪstər/

To improve data transmission rate of JTAG interface, instruction register and related control logic are redesigned.
The collection of instructions is implemented as patterns, each one of which has a different meaning when loading into the instruction register.
Control unit ( controller ): Control unit is composed of program arithmometer, instruction register and operation controller, ect.
The boundary scan adopts the address, data, control register together with instruction register to access relevant space, utilizes original circuit of core of DSP, decreases the cost of hardware;
Based on the driver of JTAG, a set of functions is provided including data / instruction register reading / writing, chain selecting, bypassing and resetting to the caller.

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