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MAX16068 Datasheet(PDF) 32 Page - Maxim Integrated Products |
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MAX16068 Datasheet(HTML) 32 Page - Maxim Integrated Products |
32 / 40 page ![]() 32 _____________________________________________________________________________________ 6-Channel, Flash-Configurable System Manager with Nonvolatile Fault Registers Pause-DR: Shifting of the test data registers halts while in this state. All test data registers retain their previous state. The controller remains in this state while TMS is low. A rising edge on TCK with TMS high puts the con- troller in the exit2-DR state. Exit2-DR: A rising edge on TCK with TMS high while in this state puts the controller in the update-DR state. A ris- ing edge on TCK with TMS low enters the shift-DR state. Update-DR: A falling edge on TCK while in the update- DR state latches the data from the shift register path of the test data registers into a set of output latches. This prevents changes at the parallel output because of changes in the shift register. On the rising edge of TCK, the controller goes to the run-test/idle state if TMS is low or goes to the select-DR-scan state if TMS is high. Select-IR-Scan: All test data registers retain the previ- ous states. The instruction register remains unchanged during this state. With TMS low, a rising edge on TCK moves the controller into the capture-IR state. TMS high during a rising edge on TCK puts the controller back into the test-logic-reset state. Capture-IR: Use the capture-IR state to load the shift register in the instruction register with a fixed value. This value is loaded on the rising edge of TCK. If TMS is high on the rising edge of TCK, the controller enters the exit1-IR state. If TMS is low on the rising edge of TCK, the controller enters the shift-IR state. Shift-IR: In this state, the shift register in the instruction register connects between TDI and TDO and shifts data one stage for every rising edge of TCK toward the TDO serial output while TMS is low. The parallel outputs of the instruction register as well as all test data registers remain at the previous states. A rising edge on TCK with TMS high moves the controller to the exit1-IR state. A rising edge on TCK with TMS low keeps the controller in the shift-IR state while moving data one stage through the instruction shift register. Figure 11. Tap Controller State Diagram TEST-LOGIC-RESET 1 1 1 1 0 0 RUN-TEST/IDLE 0 0 0 0 1 1 1 0 0 1 0 1 1 0 1 0 1 SELECT-DR-SCAN SELECT-IR-SCAN CAPTURE-DR CAPTURE-IR SHIFT-DR SHIFT-IR EXIT1-DR EXIT1-IR PAUSE-DR PAUSE-IR EXIT2-DR EXIT2-IR UPDATE-DR UPDATE-IR 0 0 0 0 1 1 0 1 1 |
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