NRF24AP2-USBQ32-R7 datasheet(21/44 Pages) ETC1

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nRF24AP2-USB Product Specification

Host interface

The nRF24AP2-USB has a USB v2.0 compliant host interface. This enables direct connection from the

nRF24AP2-USB to a computer or hubs in other USB enabled equipment. Together with the command

libraries and USB drivers available from ANT the nRF24AP2-USB enables ANT connectivity for

applications in computers and other advanced hosts.

5.1

Features

USB serial interface of nRF24AP2-USB:

•

Serial interface engine:

USB v2.0 compliant

On-chip pull-up resistor on D+

•

Two control endpoints and two bulk endpoints

•

Suspend and resume power management functions

•

USB drivers and ANT command libraries supported by ANT

The following USB features are necessary to declare when your product undergoes USB compliance

testing:

•

Full speed peripheral

•

Microcontroller with USB drivers on same chip

•

Bus powered

•

No remote wakeup

5.2

Block diagram

Figure 11. shows a USB block with external signals VBUS, D+,D-,GND, on-chip pull up resistor on D+ on

one side and connection to the RF transceiver on the other.

Note: The serial resistors on VBUS, D+ and D- are for ESD protection and USB v2.0 compliance

Figure 11. USB block connected to ANT engine

5.3

Functional description

When the nRF24AP2-USB is plugged into a USB the first thing that needs to take place is for the

nRF24AP2-USB to identify itself for the USB hub. This process is called enumeration and is handled auto-

matically by the nRF24AP2-USB. Once the device is enumerated, applications on the host can access the

nRF24AP2-USB using ANT command libraries.

nRF24AP2-USB

Computer

Matching

network

Crystal

D+

D-

GND

VBUS

Antenna

Resistors

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