參數(shù)資料
型號: PC7410
廠商: Atmel Corp.
英文描述: PowerPC 7410 RISC Microprocessor Product Specification
中文描述: 7410的PowerPC RISC微處理器產(chǎn)品規(guī)格
文件頁數(shù): 41/54頁
文件大?。?/td> 692K
代理商: PC7410
41
PC7410
2141D–HIREL–02/04
It is the recommendation of Motorola, that systems that implement the AV
DD
filter shown
in Figure 29 design in the pads for the removed capacitors (shown in Figure 28), to pro-
vide for the possible reintroduction of the filter in Figure 28. This would be necessary in
case there is a planned transition to the HCTE package of the PC7410.
Figure 28.
PLL Power Supply Filter Circuit #1
Figure 29.
PLL Power Supply Filter Circuit #2
Power Supply Voltage
Sequency
The notes in Table 2 contain cautions about the sequencing of the external bus voltages
and core voltage of the PC7410 (when they are different). These cautions are necessary
for the long term reliability of the part. If they are violated, the electrostatic discharge
(ESD) protection diodes will be forward-biased and excessive current can flow through
these diodes. If the system power supply design does not control the voltage sequenc-
ing, one or both of the circuits of Figure 30 can be added to meet these requirements.
The MUR420 Schottky diodes of Figure 30 control the maximum potential difference
between the external bus and core power supplies on power-up and the 1N5820 diodes
regulate the maximum potential difference on power-down.
Figure 30.
Example Voltage Sequencing Circuits
V
DD
10
2.2
μ
F
2.2
μ
F
GND
AV
DD
(or L2AV
DD
)
Low ESL surface mount capacitor
VDD
AVDD
51
GND
Capacitor
Pad Sites
MUR420
MUR420
1N5820
1N5820
1.8V
2.5V
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