User's Manual

2/18/03
2/18/032/18/03
2/18/03 7
77
7
TABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
1. OVERVIEW...................................................................................................................................... 9
2. AC4490 SPECIFICATIONS.......................................................................................................... 10
3. SPECIFICATIONS......................................................................................................................... 11
3.1 I
NTERFACE
S
IGNAL
D
EFINITIONS
................................................................................................... 11
3.2 E
LECTRICAL
S
PECIFICATIONS
........................................................................................................ 12
3.3 S
YSTEM
T
IMING
............................................................................................................................. 12
3.3.1 Serial Interface Data Rate .................................................................................................... 12
3.3.2 Latency Times ....................................................................................................................... 13
3.3.3 Maximum Overall System Throughput.................................................................................. 13
4. CONFIGURING THE AC4490..................................................................................................... 14
4.1 EEPROM P
ARAMETERS
................................................................................................................ 14
4.2 EEPROM C
ONFIGURATION
C
OMMANDS
....................................................................................... 15
4.2.1 EEPROM Byte Read ............................................................................................................. 16
4.2.2 EEPROM Byte Write............................................................................................................. 16
4.2.3 EEPROM Exit Configuration Command .............................................................................. 16
4.3 O
N
-
THE
-F
LY
C
ONTROL
C
OMMAND
R
EFERENCE
............................................................................ 17
4.3.1 Status Request....................................................................................................................... 17
4.3.2 Change Channel without Forced Acquisition Sync............................................................... 17
4.3.3 Change Channel with Forced Acquisition Sync.................................................................... 18
4.3.4 Server/Client Command........................................................................................................ 18
4.3.5 Sync to Channel Command................................................................................................... 19
4.3.6 Power-Down Command........................................................................................................ 19
4.3.7 Power-Down Wake-Up Command........................................................................................ 19
4.3.8 Broadcast Mode.................................................................................................................... 20
4.3.9 Write Destination Address .................................................................................................... 20
4.3.10 Read Destination Address..................................................................................................... 20
4.3.11 Read Digital Inputs............................................................................................................... 21
4.3.12 Read ADC ............................................................................................................................. 21
4.3.13 Report Last Valid RSSI ......................................................................................................... 22
4.3.14 Write Digital Outputs............................................................................................................ 22
4.3.15 Write DAC............................................................................................................................. 23
4.3.16 Set Max Power...................................................................................................................... 23
4.3.17 Transmit Buffer Empty.......................................................................................................... 24
5. THEORY OF OPERATION.......................................................................................................... 25
5.1 H
ARDWARE INTERFACE
................................................................................................................. 25
5.1.1 GIn (Generic Inputs 0 and 1) (pins 4 and 14 respectively) and GOn (Generic Outputs 0 and
1) (pins 1 and 9 respectively).................................................................................................................... 25
5.1.2 TXD (Transmit Data) and RXD (Receive Data) (pins 2 and 3 respectively) ........................ 25
5.1.3 Hop Frame (pin 6) ................................................................................................................ 25
5.1.4 CTS Handshaking (pin 7)...................................................................................................... 26
5.1.5 RTS Handshaking (pin 8)...................................................................................................... 26
5.1.6 9600 Baud/Packet Frame (pin 12)........................................................................................ 26
5.1.7 RSSI (pin 13)......................................................................................................................... 26
5.1.8 UP_Reset (pin 15)................................................................................................................. 27
5.1.9 Command/Data (pin 17) ....................................................................................................... 27
5.1.10 AD In and AD Out (pins 18 and 19 respectively).................................................................. 28
5.1.11 In Range (pin 20) .................................................................................................................. 28