XR18W750 ON Semiconductor, XR18W750 Datasheet - Page 7

• Manufacturer Part Number: XR18W750
• Manufacturer: ON Semiconductor

REV. 1.0.0
The XR18W753 is an RF Transceiver with frequency ranges of 868MHz - 954MHz and a data rate of 250kbps.
All of the Physical Layer Management Entity (PLME) registers to configure and control the XR18W753 can be
accessed via the I
An external I
the Wireless UART chipset. The I
The table below describes all of the parameters that are stored in the external I
Point-to-point communication is similar to two UARTs communicating via RS-232 or RS-422. The differences
being that the communication is now wireless and half-duplex.
transmitted, the Wireless UART chipset waits until an ACK is received. If an ACK has not been received, the
Wireless UART chipset will re-transmit the packet. The Wireless UART chipset will attempt to re-transmit the
packet until the specified number of retries has been reached.
In this communication mode, the packet will only be received and an ACK will be sent if the two Wireless UART
chipsets are configured for the same frequency, with matching AES security keys and the Destination ID of the
packet matches the Source ID of the Wireless UART chipset.
2.0 COMMUNICATION MODES
2.1
1.4.1
1.4.2
1.4.2.1
Channel Number (Frequency)
Communication Mode
XR18W753 address
Number of Retries
AES Security Key
Autobaud Detect
Power-up Mode
Point-to-Point
Destination ID
Power Level
P
Baud Rate
Source ID
XR18W753 RF Transceiver
External EEPROM
Group ID
ARAMETER
2
C EEPROM is required to store the firmware for the 8051 microprocessor and the parameters of
EEPROM Parameters
2
C interface. See the XR18W753 datasheet for complete details.
B
2
YTES
C EEPROM must have at least 32KB of memory.
16
4
4
4
1
1
1
1
1
1
1
1
T
ABLE
These bytes are sent in the packet preamble to identify who is sending the
packet in P2P mode.
These bytes are sent in the packet preamble to identify who is to receive
the packet in the P2P mode.
These 4 bytes store the default baud rate that the UART will be initialized
to during the next power-up.
This parameter selects the communication mode: P2P, P2M, Broadcast.
This byte stores the default or last used channel frequency of the
XR18W753 RF Transceiver.
This byte stores the number of times to re-transmit a packet when an ACK
is not received in P2P mode before giving up.
These bytes are compared by the recipient when a broadcast packet has
been received.
This byte stores the default power level for the XR18W753.
This byte stores the I
This byte selects whether the device has the Autobaud Detect feature
enabled upon power-up.
This byte selects whether the device powers up in the command or the
data mode.
This parameter is used for as the encoding/decoding key in the AES
Engine.
1: EEPROM P
7
ARAMATERS
2
C address of the XR18W753.
Each time a wireless data packet is
D
ESCRIPTION
WIRELESS UART CONTROLLER
2
C EEPROM.
XR18W750