NRF9160-SICA-R7 datasheet(281/400 Pages) NORDIC

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Peripherals

Bit number

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

D C B B A A

Reset 0x00000012

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0

R/W

Field

Value ID

Value

Description

DMASEC

Security attribution for the DMA transfer

Note: This bit has effect only if PERIPHID[n].PERM.SECATTR

is set to secure

Secure

DMA transfers initiated by this peripheral have the secure attribute set

NonSecure

DMA transfers initiated by this peripheral have the non-secure

attribute set

LOCK

Unlocked

This register can be updated

Locked

The content of this register can't be changed until the next reset

PRESENT

Indicate if a peripheral is present with ID n

NotPresent

Peripheral is not present

IsPresent

Peripheral is present

6.16 TIMER — Timer/counter

This peripheral is a general purpose timer designed to keep track of time in user-selective time intervals, it

can operate in two modes: timer and counter.

PCLK1M

Prescaler

TIMER Core

CC[0..n]

fTIMER

Increment

MODE

PRESCALER

Counter

BITMODE

PCLK16M

TIMER

Figure 88: Block schematic for timer/counter

The timer/counter runs on the high-frequency clock source (HFCLK) and includes a four-bit (1/2X)

prescaler that can divide the timer input clock from the HFCLK controller. Clock source selection between

PCLK16M and PCLK1M is automatic according to TIMER base frequency set by the prescaler. The TIMER

base frequency is always given as 16 MHz divided by the prescaler value.

The PPI system allows a TIMER event to trigger a task of any other system peripheral of the device. The PPI

system also enables the TIMER task/event features to generate periodic output and PWM signals to any

GPIO. The number of input/outputs used at the same time is limited by the number of GPIOTE channels.

TIMER can operate in two modes: Timer mode and Counter mode. In both modes, TIMER is started by

triggering the START task, and stopped by triggering the STOP task. After the timer is stopped the timer

can resume timing/counting by triggering the START task again. When timing/counting is resumed, the

timer will continue from the value it had prior to being stopped.

4418_1315 v2.0

281

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