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EM6580WS11 Datasheet(PDF) 9 Page - EM Microelectronic - MARIN SA

Part # EM6580WS11
Description  Ultra Low Power 8-pin Flash Microcontroller
PDF  56 Pages
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Manufacturer  EMMICRO [EM Microelectronic - MARIN SA]
Direct Link  http://www.emmicroelectronic.com
Logo EMMICRO - EM Microelectronic - MARIN SA

EM6580WS11 Datasheet(HTML) 9 Page - EM Microelectronic - MARIN SA

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EM6580
Copyright © 2006, EM Microelectronic-Marin SA
9
www.emmicroelectronic.com
4.1 POR with Power-Check Reset
An on chip detection circuit generates a power-on reset (POR). The POR is generated whenever VDD is
below the detection level defined in section 17.4. A second detection circuit circuitry, power check level,
ensures a proper start-up of the microcontroller if VDD is higher than this level. This level is higher than POR
and defined in section 17.4.
If VDD drops below the static POR level, the chip goes in reset state.
To distinguish between POR reset and all other types of reset, the PORstatus bit in RegSysCntl2 is set on at
every POR and is cleared by writing the RegSysCntl1 register.
Figure 5. EM6580 Start-up sequence
Power on
reset level
Power
check level
Internal Reset
V
DD
Tpchk
Tpor



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