NRF52820-QDAA-R datasheet(371/437 Pages) NORDIC

371 / 437 page

Peripherals

Flash

Data RAM

EasyDMA

for each endpoint

Local

buffers

Serial

interface

engine

(SIE)

Physcial

layer (PHY)/

Transceiver

LDO

ref

VBUS

DECUSB

D-

D+

Event

generator

USBDETECTED

USBREMOVED

USBPWRRDY

POWER

USBD

MAC

tasks

events

Registers

PLL

HFXO

Figure 135: USB device block diagram

Listed here are the main features for USBD:

• Full-speed (12 Mbps) device fully compliant to Universal Serial Bus Specification Revision 2.0, including

following engineering change notices (ECNs) issued by USB Implementers Forum:

• Pull-up/pull-down Resistors ECN

• 5V Short Circuit Withstand Requirement Change ECN

• USB device stack available in the Nordic SDK

• Integrated (on-chip) USB transceiver (PHY)

• Software controlled on-chip pull-up on D+

• Endpoints:

• Two control (1 IN, 1 OUT)

• 14 bulk/interrupt (7 IN, 7 OUT)

• Two isochronous (1 IN, 1 OUT)

• Double buffering for isochronous (ISO) endpoints (IN/OUT) support

• USB suspend, resume, and remote wake-up support

• 64 bytes buffer size for each bulk/interrupt endpoint

• Up to 1023 bytes buffer size for ISO endpoints

• EasyDMA for all data transfers

6.26.1 USB device states

The behavior of a USB device can be modelled through a state diagram.

The USB 2.0 Specification (see Chapter 9 USB Device Framework) defines a number of states for a USB

device, as shown in the following figure.

4463_156 v1.0

371

NRF52820-QDAA-R Datasheet(PDF) 371 Page - Nordic Semiconductor

NRF52820-QDAA-R Datasheet(HTML) 371 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