NRF52810-QFAA-R datasheet(189/483 Pages) NORDIC

189 / 483 page

Peripherals

An event can be generated in each GPIOTE channel from one of the following input conditions:

• Rising edge

• Falling edge

• Any change

6.9.1 Pin events and tasks

The GPIOTE module has a number of tasks and events that can be configured to operate on individual

GPIO pins.

The tasks (SET[n], CLR[n] and OUT[n]) can be used for writing to individual pins, and the events (IN[n]) can

be generated from changes occurring at the inputs of individual pins.

The SET task will set the pin selected in CONFIG[n].PSEL to high.

The CLR task will set the pin low.

The effect of the OUT task on the pin is configurable in CONFIG[n].POLARITY , and can either set the pin

high, set it low, or toggle it.

The tasks and events are configured using the CONFIG[n] registers. Every set of SET, CLR and OUT[n] tasks

and IN[n] events has one CONFIG[n] register associated with it.

As long as a SET[n], CLR[n] and OUT[n] task or an IN[n] event is configured to control a pin n, the pin's

output value will only be updated by the GPIOTE module. The pin's output value as specified in the GPIO

will therefore be ignored as long as the pin is controlled by GPIOTE. Attempting to write a pin as a normal

GPIO pin will have no effect. When the GPIOTE is disconnected from a pin, see MODE field in CONFIG[n]

When conflicting tasks are triggered simultaneously (i.e. during the same clock cycle) in one channel, the

precedence of the tasks will be as described in Task priorities on page 189.

Priority

Task

OUT

CLR

SET

Table 39: Task priorities

When setting the CONFIG[n] registers, MODE=Disabled does not have the same effect as MODE=Task and

POLARITY=None. In the latter case, a CLR or SET task occurring at the exact same time as OUT will end up

with no change on the pin, according to the priorities described in the table above.

When a GPIOTE channel is configured to operate on a pin as a task, the initial value of that pin is

configured in the OUTINIT field of CONFIG[n].

6.9.2 Port event

PORT is an event that can be generated from multiple input pins using the GPIO DETECT signal.

The event will be generated on the rising edge of the DETECT signal. See GPIO — General purpose input/

output on page 137 for more information about the DETECT signal.

Putting the system into System ON IDLE while DETECT is high will not cause DETECT to wake the system

up again. Make sure to clear all DETECT sources before entering sleep. If the LATCH register is used as a

source, if any bit in LATCH is still high after clearing all or part of the register (for instance due to one of

the PINx.DETECT signal still high), a new rising edge will be generated on DETECT, see Pin configuration on

page 137.

Trying to put the system to System OFF while DETECT is high will cause a wakeup from System OFF reset.

4430_161 v1.0

189

NRF52810-QFAA-R Datasheet(PDF) 189 Page - Nordic Semiconductor

NRF52810-QFAA-R Datasheet(HTML) 189 Page - Nordic Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL