NRF52811-QCAA-R7 datasheet(184/444 Pages) NORDIC

184 / 444 page

Peripherals

DISABLED

TXRU

TXIDLE

Ramp-up

complete

/ READY

START

Packet sent / END

Address sent

/ ADDRESS

Payload sent

[payload length >=0]

/ PAYLOAD

RXRU

RXIDLE

Ramp-up

complete

/ READY

START

Packet received / END

Address received

[Address match]

/ ADDRESS

Payload received

[payload length >=0]

/ PAYLOAD

RXDISABLE

/ DISABLED

TXDISABLE

/ DISABLED

STOP

Last bit sent / PHYEND

TXEN

RXEN

DISABLE

TXEN

Figure 62: Radio states

This figure shows how the tasks and events relate to the RADIO's operation. The RADIO does not prevent

a task from being triggered from the wrong state. If a task is triggered from the wrong state, for example

if the RXEN task is triggered from the RXDISABLE state, this may lead to incorrect behavior. The PAYLOAD

event is always generated even if the payload is zero.

The END to START shortcut should not be used with Ble_LR125Kbit, Ble_LR500Kbit, and

Ieee802154_250Kbit modes. Rather the PHYEND to START shortcut.

6.14.6 Transmit sequence

Before the RADIO is able to transmit a packet, it must first ramp-up in TX mode. See TXRU in Radio states

on page 184 and Transmit sequence on page 185. A TXRU ramp-up sequence is initiated when the

TXEN task is triggered. After the RADIO has successfully ramped up it will generate the READY event

indicating that a packet transmission can be initiated. A packet transmission is initiated by triggering the

START task. The START task can first be triggered after the RADIO has entered into the TXIDLE state.

The following figure illustrates a single packet transmission where the CPU manually triggers the different

tasks needed to control the flow of the RADIO, i.e. no shortcuts are used. If shortcuts are not used, a

certain amount of delay caused by CPU execution is expected between READY and START, and between

END and DISABLE. As illustrated in Transmit sequence on page 185 the RADIO will by default transmit

'1's between READY and START, and between END and DISABLED. What is transmitted can be programmed

through the DTX field in the MODECNF0 register.

4454_140 v1.0

184

NRF52811-QCAA-R7 bảng dữ liệu(PDF) 184 Page - Nordic Semiconductor

NRF52811-QCAA-R7 bảng dữ liệu(HTML) 184 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

bảng dữ liệu tải về

Link URL