EM6607 datasheet(10/47 Pages) EMMICRO

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EM6607

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4.3

Input port (PA0..PA3) RESET

With a mask option it is possible to choose from eleven PortA reset combinations. The selected ports must be simultaneously

high for at least 2ms/16ms (CLK = 32kHz) due to the presence of debouncers. Note also, that RESET with port A is not

possible during SLEEP mode.

Below are the combinations of Port A (PA0..PA3) inputs, which can be used to generate a RESET. They can be selected by

metal « PortA RESET » mask option, described in chapter 14.

Table 4.

PortA Inputs RESET options

(metal Hardware option)

Function

Opt. Code

NO inputs RESET

rstpa_no

RESET = PA0 AND PA1

rstpa_3h

RESET = PA0 AND PA2

rstpa_5h

RESET = PA1 AND PA2

rstpa_6h

RESET = PA0 AND PA1 AND PA2

rstpa_7h

RESET = PA0 AND PA3

rstpa_9h

RESET = PA1 AND PA3

rstpa_ah

RESET = PA0 AND PA1 AND PA3

rstpa_bh

RESET = PA2 AND PA3

rstpa_ch

RESET = PA0 AND PA2 AND PA3

rstpa_dh

RESET = PA1 AND PA2 AND PA3

rstpa_eh

RESET = PA0 AND PA1 AND PA2 AND PA3

rstpa_fh

4.4

Watchdog Timer RESET

The Watchdog Timer RESET is a software option and if used it will generate a RESET if it is not cleared. See section 5.

Watchdog timer for details.

Table 5.

Watchdog-Timer Option

(software option)

Watchdog Function

NoWD

bit in Option register

Without Watchdog Time-out reset

With Watchdog Time-out reset

4.5

Software Power-On-Reset

This is software generation of POR, which can be used mainly to reset the circuit and start again the Power-Check function if

enabled to be sure that VDD supply is high enough when circuit will start to work again due to increased VDD.

When VDD starts to decrease due to any reason and software by periodically testing the VDD min by SVLD function detects this,

user can generate POR at VDD min and like that the circuit will go in Reset until Power-Check level is satisfied again to

guarantee the proper circuit operation, not to fall in a grey zone below VDD min until Static POR does it job at typ. 0.9V.

Table 6.

Software Power-On-Reset

Software POR function

SoftPOR

in RegSoftPOR register

Software POR start

No Software POR

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