User's Manual
Table Of Contents
- Part Number
- Overview
- AC4490 Specifications
- Specifications
- Configuring the AC4490
- EEPROM Parameters
- EEPROM Configuration Commands
- On-the-Fly Control Command Reference
- Status Request
- Change Channel without Forced Acquisition Sync
- Change Channel with Forced Acquisition Sync
- Server/Client Command
- Sync to Channel Command
- Power-Down Command
- Power-Down Wake-Up Command
- Broadcast Mode
- Write Destination Address
- Read Destination Address
- Read Digital Inputs
- Read ADC
- Report Last Valid RSSI
- Write Digital Outputs
- Write DAC
- Set Max Power
- Transmit Buffer Empty
- Theory of Operation
- Hardware interface
- GIn (Generic Inputs 0 and 1) (pins 4 and 14 respectively) and GOn (Generic Outputs 0 and 1) (pins 1 and 9 respectively)
- TXD (Transmit Data) and RXD (Receive Data) (pins 2 and 3 respectively)
- Hop Frame (pin 6)
- CTS Handshaking (pin 7)
- RTS Handshaking (pin 8)
- 9600 Baud/Packet Frame (pin 12)
- RSSI (pin 13)
- UP_Reset (pin 15)
- Command/Data (pin 17)
- AD In and AD Out (pins 18 and 19 respectively)
- In Range (pin 20)
- Software Parameters
- Hardware interface
- Application Examples
- Dimensions
- Ordering Information
AC4490 Specifications
AC4490 SpecificationsAC4490 Specifications
AC4490 Specifications
2/18/03
2/18/032/18/03
2/18/03 17
1717
17
4.3
4.34.3
4.3
O
OO
O
N
NN
N
-
--
-
THE
THETHE
THE
-F
-F-F
-F
LY
LY LY
LY
C
CC
C
ONTROL
ONTROL ONTROL
ONTROL
C
CC
C
OMMAND
OMMAND OMMAND
OMMAND
R
RR
R
EFERENCE
EFERENCEEFERENCE
EFERENCE
The AC4490 transceiver contains static memory that holds many of the parameters that control the
transceiver operation. Using the “CC” command set allows many of these parameters to be changed
during system operation. Because the memory these commands affect is static, when the transceiver
is reset, these parameters will revert back to the settings stored in the EEPROM. Do not to modify
Do not to modifyDo not to modify
Do not to modify
undocumented static addresses as undesired operation may occur. All “CC” commands must be
undocumented static addresses as undesired operation may occur. All “CC” commands must beundocumented static addresses as undesired operation may occur. All “CC” commands must be
undocumented static addresses as undesired operation may occur. All “CC” commands must be
issued from the Host to the transceiver with Command/Data (Pin 17) pulled logic Low. To exit “CC”
issued from the Host to the transceiver with Command/Data (Pin 17) pulled logic Low. To exit “CC”issued from the Host to the transceiver with Command/Data (Pin 17) pulled logic Low. To exit “CC”
issued from the Host to the transceiver with Command/Data (Pin 17) pulled logic Low. To exit “CC”
mode, simply take the Command/Data pin High.
mode, simply take the Command/Data pin High.mode, simply take the Command/Data pin High.
mode, simply take the Command/Data pin High.
4.3.1
4.3.14.3.1
4.3.1
Status Request
Status RequestStatus Request
Status Request
The Host issues this command to request the status of the transceiver.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 00h
Byte 3 = 00h
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Byte 2 = Firmware version number
Byte 3 = Data1
Where:
Where:Where:
Where:
Data1 =
00 for Server in Normal Operation
01 for Client in Normal Operation
02 for Server in Acquisition Sync
03 for Client in Acquisition Sync
4.3.2
4.3.24.3.2
4.3.2
Change Channel without Forced Acquisition Sync
Change Channel without Forced Acquisition SyncChange Channel without Forced Acquisition Sync
Change Channel without Forced Acquisition Sync
The Host issues this command to change the channel of the transceiver. The transceiver will not begin
acquisition sync until its Range Refresh timer expires.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 01h
Byte 3 = RF Channel Number (Hexadecimal)
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Byte 2 = RF Channel Number (Hexadecimal)