WAKE

DONE

RSTn

DELAY/

M_RST

ttM_RSTt

ttDBt

ttRSTn+ tIPt

ttIPt

ttM_RSTt

NOT VALID M_RST

VALID M_RST

ANY RESET

11

TPL5010

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SNAS651A – JANUARY 2015 – REVISED SEPTEMBER 2018

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Programming (continued)

8.5.2 Manual Reset

If VDD is connected to the DELAY/M_RST pin, the TPL5010 recognizes this as a manual reset condition. In this

case, the time interval is not set. If the manual reset is asserted during the POR or during the reading procedure,

the reading procedure is aborted and is restarted as soon as the manual reset switch is released. A pulse on the

DELAY/M_RST pin is recognized as a valid manual reset only if it lasts at least 20 ms (observation time is 30

ms).

A valid manual reset resets all the counters inside the TPL5010. The counters restart only when the high digital

voltage at DELAY/M_RST is removed and the next tRSTn is elapsed.

Figure 10. Manual Reset

8.5.2.1 DELAY/M_RST

A resistance in the range between 500 Ω and 170 kΩ needs to be connected to select a valid time interval. At the

POR and during the reading of the resistance the DELAY/M_RST is connected to an analog signal chain though

a mux. After the reading of the resistance the analog circuit is switched off and the DELAY/RST is connected to

a digital circuit.

The manual reset detection is supported with a de-bounce feature which makes the TPL5010 insensitive to the

glitches on the DELAY/M_RST pin. When a valid manual reset signal is asserted on the DELAY/M_RST pin, the

RSTn signal is asserted LOW after a delay of tM_RST. It remains LOW after a valid manual reset is asserted + tDB

+ tRSTn. Due to the asynchronous nature of the manual reset signal and its arbitrary duration, the LOW status of

the RSTn signal maybe affected by an uncertainty of about ±5 ms.

A valid manual reset puts all the digital output signals at their default values:

•

WAKE = LOW

•

RSTn = asserted LOW

8.5.2.2 Circuitry

The manual reset may be implemented using a switch (momentary mechanical action). The TPL5010 offers two

possible approaches according to the power consumption constraints of the application.