EM6580SO14A EMMICRO [EM Microelectronic - MARIN SA], EM6580SO14A Datasheet - Page 8

• Manufacturer Part Number: EM6580SO14A
• Description: Ultra Low Power 8-pin Flash Microcontroller
• Manufacturer: EMMICRO [EM Microelectronic - MARIN SA]

4. Reset
Figure 6. illustrates the reset structure of the EM6580. One can see that there are five possible reset sources :
Table 4.1 Reset sources that can be used in different Operating modes
XS = software enable
Figure 4. EM6580 Reset Structure
All reset sources activate the System Reset (ResSys). The ‘System Reset Delay’ ensures that the system reset
remains active long enough for all system functions to be reset (active for 12 system clock cycles. CPU is reset
by the same reset
As well as activating the system reset, the POR also resets all bits in registers marked ‘p’ and the sleep enable
(SleepEn) latch. System reset does not reset these register bits, nor the sleep enable latch.
Copyright © 2006, EM Microelectronic-Marin SA
Reset Sources
POR (static) with Power Check
Software enabled reset on PA[3/4]
Digital Watch-Dog Timer
Sleep Counter Reset
Wake Up on Change from Sleep
Going in Sleep mode
(1) Internal initial Power On Reset (POR) circuitry with Power-Check.
(2) External reset from PA[3/4] if software enabled
(3) Internal reset from the Digital Watchdog.
(4) Internal reset from the Sleep Counter Reset.
(5) Wake-Up on change from PA[0/5] or PA[3/4] if software enabled.
Wake up (on change)
R
Write - Active
Write - Reset
Read Statuts
Read Statuts
PA[3]
PA[4]
PA[3/4]Resin
Ck[1]
InResAH
Debounce
Analogue
Filter
ck[9]
RESETs generation logic diagram
SleepEn
times
Watchdog
WDVal
ACTIVE mode
All signals enter bottom, left, top and output on the right side of the boxes
XS dig. debounced
POR &
Power-check
WDVa
Sleep
Yes
Yes
XS
No
No
Rd RegSysCntl1
8
NoWDtim
STAND-BY mode
XS dig. debounced
Set
Reset Oscillator
Reset
Sleep Counter
resetCold
POR, ResetCold, System Reset, Reset CPU
Yes
No
No
No
XS
System Reset, Reset CPU
System Reset, Reset CPU
System Reset, Reset CPU
System Reset, Reset CPU
PORstatus
typ . 100Hz
System Reset
ck[15]
Delay
SLEEP mode
XS analog debounced
Prescaler
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SCRsel0
SCRsel1
EM6580
Sleep
ResSys
POR
Yes
No
XS
XS
No
Peripherals
CPU
&