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MPC8280 bảng dữ liệu(PDF) 537 Page - Freescale Semiconductor, Inc

tên linh kiện MPC8280
Giải thích chi tiết về linh kiện  PowerQUICC??II Family Reference Manual
PDF  1386 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
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MPC8280 bảng dữ liệu(HTML) 537 Page - Freescale Semiconductor, Inc

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IEEE 1149.1 Test Access Port
MPC8280 PowerQUICC II Family Reference Manual, Rev. 1
Freescale Semiconductor
13-3
Figure 13-2. TAP Controller State Machine
13.3
Boundary Scan Register
The MPC8280’s scan chain implementation has a 878-bit boundary scan register that contains bits for all
device signal, clock pins, and associated control signals. The PORESET_B and XFC pins are associated
with analog signals and are not included in the boundary scan register. An IEEE-1149.1-compliant
boundary-scan register has been included on the MPC8280 that can be connected between TDI and TDO
when EXTEST or SAMPLE/PRELOAD instructions are selected. It is used for capturing signal pin data
on the input pins, forcing fixed values on the output signal pins, and selecting the direction and drive
characteristics (a logic value or high impedance) of the bidirectional and three-state signal pins.
Figure 13-3, Figure 13-4, Figure 13-5, and Figure 13-6 show various cell types.
Test Logic
Reset
Run—Test/Idle
Select—DR_SCAN
Capture—DR
Shift—DR
Exit1—DR
Pause—DR
Exit2—DR
Update—DR
Select—IR_SCAN
Capture—IR
Shift—IR
Exit1—IR
Pause—IR
Exit2—IR
Update—IR
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