Datasheet > EM6682WS27

EM6682WS27

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
EMMICRO		微控制器
页数	文件大小	规格书
61页	1744K
描述
Ultra Low Power 8-pin Microcontroller

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EM6682WS27 数据手册

EM6682

4. Reset

Figure 6. illustrates the reset structure of the EM6682. One can see that there are five possible reset sources :

(1) Internal initial Power On Reset (POR) circuitry with Power-Check. Æ POR, ResetCold, System reset, ResetCPU

(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.

Æ System Reset, Reset CPU

(5) Wake-Up on change from PA[0/5] or PA[3/4] if software enabled. Æ System Reset, Reset CPU

Table 4.1 Reset sources that can be used in different Operating modes

Reset Sources

ACTIVE mode

STAND-BY mode

SLEEP mode

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

Yes

XS dig. debounce

XS analog debounce

YES

XS = software enable

Figure 6. EM6682 Reset Structure

RESETs generation logic diagram

SCRsel[1:0]

Ck[1]

NoWDtim

WDVal0

WDVal1

Write - Reset

Read Statuts

Watchdog

times

typ. 100Hz

Sleep Counter

Reset Oscillator

Prescaler

Write - Active

Read Statuts

SleepEn

Sleep

ResetCold

System Reset

Delay

ResSys

Peripherals

Analog

CPU

Filter

ck[15]

WakeUp (on

Change)

Debounce

POR &

Power-Check

POR

InResAH

ck[9]

Set

PORstatus

Reset

Rd RegSysCntl1

PA[3]

PA[4]

PA[3/4]Resin

All signals enter bottom, left, top and output on the right side of the boxes

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 N 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 do not reset these registers bits, nor the sleep enable latch.

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