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SPEAR320-2 Folha de dados(PDF) 50 Page - STMicroelectronics

Nome de Peças SPEAR320-2
Descrição Electrónicos  Embedded MPU with ARM926 core, optimized for factory automation and consumer applications
PDF  73 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SPEAR320-2 Folha de dados(HTML) 50 Page - STMicroelectronics

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Timing requirements
SPEAr320
50/73
Doc ID 16755 Rev 5
7
Timing requirements
Note:
Signal transition levels used for timing measurements are 0.2*VDD and 0.8*VDD.
7.1
External interrupt timing characteristics
7.2
Reset timing characteristics
Note:
Warm reset is generated by writing any value to the System controller SYSSTAT register.
7.3
DDR2 timing characteristics
The characterization timing is done considering an output load of 10 pF on all the DDR
pads.
The timing parameters listed are defined by JEDEC for DDR memories. DDR memories
whose parameters are within the ranges defined in Table 29, Table 30 and Table 31 can be
interfaced with SPEAr320.
Read cycle timing apply to DQS and DQ input to SPEAr. Write cycle timings refer to DQS
and DQ output to SPEAr.
Table 27.
PL_GPIO external interrupt input timing
Symbol
Description
Min
Unit
tINT
Minimum width for rising edge interrupt pulse
24
ns
Table 28.
Cold (power-on) reset
Symbol
Description
Min
Unit
tRP
MRESET pin active low state duration
10
ms



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