參數(shù)資料
型號: DS21FT42
元件分類: 通信及網(wǎng)絡(luò)
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): 100/145頁
文件大小: 466K
代理商: DS21FT42
DALLAS SEMICONDUCTOR
DS21FF42/DS21FT42
101899
/100
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 registers, as well as all Test registers
remain at their previous states. A rising edge on JTCLK with JTMS high will move the controller to the Exit1-IR
state. A rising edge on JTCLK with JTMS low will keep the controller in the Shift-IR state while moving data one
stage thorough the instruction shift register.
Exit1-IR
A rising edge on JTCLK with JTMS low will put the controller in the Pause-IR state. If JTMS is high on the rising
edge of JTCLK, the controller will enter the Update-IR state and terminate the scanning process.
Pause-IR
Shifting of the instruction shift register is halted temporarily. With JTMS high, a rising edge on JTCLK will put
the controller in the Exit2-IR state. The controller will remain 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 will put the controller in the Update-IR state. The controller will loop
back to Shift-IR if JTMS is high during a rising edge of JTCLK in this state.
Update-IR
The instruction code 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, will put the controller in the Run-Test-Idle state. With JTMS high, the
controller will enter the Select-DR-Scan state.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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