參數(shù)資料
型號: DS3160
元件分類: 通信及網(wǎng)絡
英文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數(shù): 89/107頁
文件大?。?/td> 592K
代理商: DS3160
DS3160
89 of 107
Shift-IR
In this state, the shift register in the instruction register is connected between JTDI and JTDO and shifts
data one stage for every rising edge of JTCLK towards the serial output. The parallel register and all test
registers remain at their previous states. A rising edge on JTCLK with JTMS high moves the controller to
the Exit1-IR state. A rising edge on JTCLK with JTMS low keeps the controller in the Shift-IR state
while moving data one stage through the instruction shift register.
Exit1-IR
A rising edge on JTCLK with JTMS low puts the controller in the Pause-IR state. If JTMS is high on the
rising edge of JTCLK, the controller enters the Update-IR state and terminates the scanning process.
Pause-IR
Shifting of the instruction register is halted temporarily. With JTMS high, a rising edge on JTCLK puts
the controller in the Exit2-IR state. The controller remains in the Pause-IR state if JTMS is low during a
rising edge on JTCLK.
Exit2-IR
A rising edge on JTCLK with JTMS low puts the controller in the Update-IR state. The controller loops
back to the Shift-IR state if JTMS is high during a rising edge of JTCLK in this state.
Update-IR
The instruction shifted into the instruction shift register is latched into the parallel output on the falling
edge of JTCLK as the controller enters this state. Once latched, this instruction becomes the current
instruction. A rising edge on JTCLK with JTMS low puts the controller in the Run-Test-Idle state. With
JTMS high, the controller enters the Select-DR-Scan state.
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