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MPC821 데이터시트(PDF) 183 Page - NXP Semiconductors

부품명 MPC821
상세설명  Design Specification
PDF  242 Pages
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
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MPC821 데이터시트(HTML) 183 Page - NXP Semiconductors

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Hardware Preparation and Installation
MOTOROLA
MPC860TFADS Daughter Board Design Specification—Rev 0.1
7
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
FIGURE 2-3 Power-On Reset Source Selection
2•3•3
VDDL Source Selection
J3 serves as a selector for VDDL - MPC internal logic supply. When a jumper is placed between po-
sitions 1 - 2 of J3, VDDL is supplied with 3.3V. When a jumper is placed between positions 2 - 3 of
J3, VDDL is supplied by 2V power source. The jumper on J3 is factory set between positions 1 - 2 to
supply 3.3 to VDDL.
FIGURE 2-4 VDDL Source Selection
2•3•4
Keep Alive Power Source Selection
J2 selects the Keep Alive power source of the MPC. When a jumper is placed between positions 1 -
2 of J2, the Keep Alive power is fed from the main 3.3V bus. When an external power sourceA is to
be connected to the Keep Alive power rail, it should be connected between positions 2 (the positive
pole) and position 3 (GND) of J2.
A. E.g., a battery.
1
1
J1
J1
KA Power Rail
MAIN Power Rail
1
1
VDDL - 3.3V
VDDL - 2V
J3
J3
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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