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EM6819 Datasheet(PDF) 41 Page - EM Microelectronic - MARIN SA

Part # EM6819
Description  Sub-1V (0.6V) 8bit Flash MCU DC-DC Converter
PDF  154 Pages
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Manufacturer  EMMICRO [EM Microelectronic - MARIN SA]
Direct Link  http://www.emmicroelectronic.com
Logo EMMICRO - EM Microelectronic - MARIN SA

EM6819 Datasheet(HTML) 41 Page - EM Microelectronic - MARIN SA

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R
EM6819
Copyright
© 2009, EM Microelectronic-Marin SA
07 /09 – rev.D
41
www.emmicroelectronic.com
6.
ROM API ROUTINES
The circuit has a ROM memory used for the following purposes: Refer also to [2].
System Boot sequence
Erase/write operation in NVM
Dump NVM row into RAM cache
CRC calculation on NVM or RAM
ISP functions (Program loading, CRC check)
6.1 BOOT SEQUENCE
This sequence runs after any reset. Depending on the reset source, the boot sequence can change as follows:
Reste source
Description
Duration
Start-up
Power-Down wake-
up
VSUP Low (1.0V)
Power-up (voltage-multiplier rising up and power check)
All trimming value are copied from NVM into the related
registers
7 ms
Start-up
Power-Down wake-
up
VSUP High (2.5V)
Power-up (power check)
All trimming value are copied from NVM into the related
registers
5 ms
ResAna
All trimming value are copied from NVM into the related
registers
3.5 ms
ResSys
No trimming value are copied from NVM into the related
registers.
1 ms
At the end of the boot sequence the watchdog is cleared. The user application software starts. All registers have the
value as described in the register map depending what reset source is the cause of the boot sequence.



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