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NRF24AP2-USBQ32-R 数据表(PDF) 21 Page - List of Unclassifed Manufacturers

部件名 NRF24AP2-USBQ32-R
功能描述  Single-chip ANT ultra-low power wireless network solution
PDF  44 Pages
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制造商  ETC1 [List of Unclassifed Manufacturers]
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标志 ETC1 - List of Unclassifed Manufacturers

NRF24AP2-USBQ32-R 数据表(HTML) 21 Page - List of Unclassifed Manufacturers

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Revision 1.0
Page 21 of 44
nRF24AP2-USB Product Specification
5
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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