NRF52811-QCAA-R datasheet(352/444 Pages) NORDIC

352 / 444 page

Peripherals

Offset

Description

TASKS_STARTRX

0x000

Start TWI receive sequence

TASKS_STARTTX

0x008

Start TWI transmit sequence

TASKS_STOP

0x014

Stop TWI transaction. Must be issued while the TWI master is not suspended.

TASKS_SUSPEND

0x01C

Suspend TWI transaction

TASKS_RESUME

0x020

Resume TWI transaction

EVENTS_STOPPED

0x104

TWI stopped

EVENTS_ERROR

0x124

TWI error

EVENTS_SUSPENDED

0x148

Last byte has been sent out after the SUSPEND task has been issued, TWI traffic is now

suspended.

EVENTS_RXSTARTED

0x14C

Receive sequence started

EVENTS_TXSTARTED

0x150

Transmit sequence started

EVENTS_LASTRX

0x15C

Byte boundary, starting to receive the last byte

EVENTS_LASTTX

0x160

Byte boundary, starting to transmit the last byte

SHORTS

0x200

Shortcuts between local events and tasks

INTEN

0x300

Enable or disable interrupt

INTENSET

0x304

Enable interrupt

INTENCLR

0x308

Disable interrupt

ERRORSRC

0x4C4

Error source

ENABLE

0x500

Enable TWIM

PSEL.SCL

0x508

Pin select for SCL signal

PSEL.SDA

0x50C

Pin select for SDA signal

FREQUENCY

0x524

TWI frequency. Accuracy depends on the HFCLK source selected.

RXD.PTR

0x534

Data pointer

RXD.MAXCNT

0x538

Maximum number of bytes in receive buffer

RXD.AMOUNT

0x53C

Number of bytes transferred in the last transaction

RXD.LIST

0x540

EasyDMA list type

TXD.PTR

0x544

Data pointer

TXD.MAXCNT

0x548

Maximum number of bytes in transmit buffer

TXD.AMOUNT

0x54C

Number of bytes transferred in the last transaction

TXD.LIST

0x550

EasyDMA list type

ADDRESS

0x588

Address used in the TWI transfer

Table 106: Register overview

6.25.7.1 TASKS_STARTRX

Address offset: 0x000

Start TWI receive sequence

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

Reset 0x00000000

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 0 0 0 0 0

Access

Field

Value ID

Value

Description

W TASKS_STARTRX

Start TWI receive sequence

Trigger

Trigger task

6.25.7.2 TASKS_STARTTX

Address offset: 0x008

Start TWI transmit sequence

4454_140 v1.0

352

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