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TABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTS
1.
OVERVIEW ......................................................................................................................................6
2.
AC4424 SPECIFICATIONS.............................................................................................................8
3.
SPECIFICATIONS .........................................................................................................................10
3.1
I
NTERFACE
S
IGNAL
D
EFINITIONS
.......................................................................................................10
3.2
E
LECTRICAL
S
PECIFICATIONS
.............................................................................................................11
3.3
S
YSTEM
T
IMING
.................................................................................................................................11
3.3.1
Serial Interface Data Rate.........................................................................................................12
3.3.2
Timing Diagrams.......................................................................................................................13
3.3.3
Maximum Overall System Throughput ......................................................................................15
4.
CONFIGURING THE AC4424......................................................................................................15
4.1
EEPROM P
ARAMETERS
....................................................................................................................15
4.2
C
ONFIGURING THE
AC4424 ..............................................................................................................19
4.3
C
OMMAND
R
EFERENCE
......................................................................................................................20
4.4
AC4424 AT C
OMMANDS
...................................................................................................................21
4.4.1
Enter AT Command Mode .........................................................................................................21
4.4.2
Exit AT Command Mode............................................................................................................21
4.5
O
N
-
THE
-F
LY
C
ONTROL
C
OMMANDS
(CC C
OMMAND
M
ODE
) ............................................................22
4.5.1
Status Request............................................................................................................................22
4.5.2
Change Channel with Forced Acquisition Sync ........................................................................23
4.5.3
Server/Client..............................................................................................................................23
4.5.4
Sync Channel .............................................................................................................................24
4.5.5
Power-Down..............................................................................................................................25
4.5.6
Power-Down Wake-Up..............................................................................................................25
4.5.7
Broadcast Mode.........................................................................................................................25
4.5.8
Write Destination Address.........................................................................................................26
4.5.9
Read Destination Address..........................................................................................................26
4.5.10
EEPROM Byte Read..................................................................................................................26
4.5.11
EEPROM Byte Write .................................................................................................................27
4.5.12
Reset ..........................................................................................................................................27
5.
THEORY OF OPERATION ..........................................................................................................28
5.1
H
ARDWARE INTERFACE
......................................................................................................................28
5.1.1
TXD (Transmit Data) and RXD (Receive Data) (pins 2 and 3 respectively).............................28
5.1.2
Hop Frame (pin 6).....................................................................................................................28
5.1.3
CTS Handshaking (pin 7) ..........................................................................................................28
5.1.4
RTS Handshaking (pin 8) ..........................................................................................................28
5.1.5
9600 Baud/Packet Frame (pin 12).............................................................................................29
5.1.6
RSSI (pin 13)..............................................................................................................................29
5.1.7
Wr_ENA(EEPROM Write Enable) (pin 14) ..............................................................................30
5.1.8
UP_RESET (pin 15)...................................................................................................................31
5.1.9
Command/Data (pin 17)............................................................................................................31
5.1.10
In Range (pin 20).......................................................................................................................31
5.2
S
OFTWARE
P
ARAMETERS
...................................................................................................................32
5.2.1
RF Architecture (Server-Client/Peer-to-Peer) ..........................................................................32
5.2.2
RF Mode ....................................................................................................................................32
5.2.3
Random Back Off.......................................................................................................................33
5.2.4
Duplex Mode .............................................................................................................................33
5.2.5
Interface Timeout/RF Packet Size..............................................................................................34