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SPEAR320 Datasheet(PDF) 48 Page - STMicroelectronics

Part # SPEAR320
Description  Embedded MPU with ARM926 core, optimized for factory automation and consumer applications
PDF  73 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SPEAR320 Datasheet(HTML) 48 Page - STMicroelectronics

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Electrical characteristics
SPEAr320
48/73
Doc ID 16755 Rev 5
6.7
Power up sequence
It is recommended to power up the power supplies in the order shown in Figure 4. VDD 1.2 is
brought up first, followed by VDD 1.8, then VDD 2.5 and finally VDD 3.3. The minimum time (Δt)
between each power up is >0 µs.
Figure 4.
Power-up sequence
Table 25.
On die termination
Symbol
Parameter
Min
Typ
Max
Unit
RT1
Termination value of resistance for on die
termination
75
Ω
RT2
Termination value of resistance for on die
termination
150
Ω
Table 26.
Reference voltage
Symbol
Parameter
Min
Typ
Max
Unit
VREFIN
Voltage applied to core/pad
0.49 *
VDDE
0.500 *
VDDE
0.51 *
VDDE
V
VDD 1.2
VDD1.8
VDD 2.5
VDD 3.3
Power-up sequence
t
t
t



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