参数资料
型号: MPC8378VRANGA
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 400 MHz, MICROPROCESSOR, PBGA689
封装: 31 X 31 MM, 2.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-689
文件页数: 115/125页
文件大小: 894K
代理商: MPC8378VRANGA
MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 5
Freescale Semiconductor
9
a period of time that all input and output pins will actively be driven and cause contention and excessive current. To avoid
actively driving the I/O pins and to eliminate excessive current draw, apply the core voltages (VDD and AVDD) before the I/O
voltages and assert PORESET before the power supplies fully ramp up. VDD and AVDD must reach 90% of their nominal value
before GVDD, LVDD, and OVDD reach 10% of their value, see the following figure. I/O voltage supplies—GVDD, LVDD, and
OVDD—do not have any ordering requirements with respect to one another.
Figure 3. Power-Up Sequencing Example
Note that the SerDes power supply (L[1,2]_nVDD) should follow the same timing as the core supply (VDD).
The opposite sequence applies to the power down requirements. The I/O supplies must go down first and immediately followed
by the core and PLL supplies.
t
90%
V
Core Voltage (VDD, AVDD)
I/O Voltage (GVDD, LVDD, and OVDD)
0
0.7 V
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