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MPC7448 bảng dữ liệu(PDF) 38 Page - Freescale Semiconductor, Inc

tên linh kiện MPC7448
Giải thích chi tiết về linh kiện  RISC Microprocessor Hardware Specifications
PDF  60 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MPC7448 bảng dữ liệu(HTML) 38 Page - Freescale Semiconductor, Inc

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MPC7448 RISC Microprocessor Hardware Specifications, Rev. 4
38
Freescale Semiconductor
System Design Information
These requirements are shown graphically in Figure 16.
Figure 16. MPC7448 Power Up Sequencing Requirements
Certain stipulations also apply to the manner in which the power rails of the MPC7448 power down, as
follows:
•OVDD may ramp down any time before or after VDD.
•
The voltage at the SYSCLK input must not exceed VDD once VDD has ramped down below 0.9 V.
•
The voltage at the SYSCLK input must not exceed OVDD by more 20% during transients (see
overshoot/undershoot specifications in Figure 2) or 0.3 V DC (see Table 2) at any time.
AVDD
VDD
OVDD
SYSCLK
0.9 V
no restrictions between OVDD and VDD
0.9 V
limit imposed by VDD if OVDD ramps up first
limit imposed by OVDD if VDD ramps up first
100
μs (nominal) delay from VDD to AVDD



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