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MPC8544E bảng dữ liệu(PDF) 111 Page - Freescale Semiconductor, Inc

tên linh kiện MPC8544E
Giải thích chi tiết về linh kiện  MPC8544E PowerQUICC III Integrated Processor Hardware Specifications
PDF  117 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MPC8544E bảng dữ liệu(HTML) 111 Page - Freescale Semiconductor, Inc

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MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 5
Freescale Semiconductor
111
System Design Information
21.9.1
Termination of Unused Signals
If the JTAG interface and COP header will not be used, Freescale recommends the following connections:
•TRST should be tied to HRESET through a 0-k
Ω isolation resistor so that it is asserted when the
system reset signal (HRESET) is asserted, ensuring that the JTAG scan chain is initialized during
the power-on reset flow. Freescale recommends that the COP header be designed into the system
as shown in Figure 69. If this is not possible, the isolation resistor will allow future access to TRST
in case a JTAG interface may need to be wired onto the system in future debug situations.
•
No pull-up/pull-down is required for TDI, TMS, or TDO.
Figure 68 shows the COP connector physical pinout.
Figure 68. COP Connector Physical Pinout
3
13
9
5
1
6
10
15
11
7
16
12
8
4
KEY
No pin
1
2
COP_TDO
COP_TDI
COP_RUN/STOP
NC
COP_TRST
COP_VDD_SENSE
COP_CHKSTP_IN
NC
NC
GND
COP_TCK
COP_TMS
COP_SRESET
COP_HRESET
COP_CHKSTP_OUT



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