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 19
1919
19
4.3.5
4.3.54.3.5
4.3.5
Sync to Channel Command
Sync to Channel CommandSync to Channel Command
Sync to Channel Command
The Host issues this command to change the Sync Channel
Sync ChannelSync Channel
Sync Channel byte. This will only affect operation when
Sync to Channel
Sync to ChannelSync to Channel
Sync to Channel is enabled in the EEPROM
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 05h
Byte 3 = Data1
Where:
Where:Where:
Where:
Data1 = New Sync Channel
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Byte 2 = 05h
Byte 3 = Data1
Where:
Where:Where:
Where:
Data1 = Data1 from Host Command
4.3.6
4.3.64.3.6
4.3.6
Power-Down Command
Power-Down CommandPower-Down Command
Power-Down Command
After the Host issues the power-down command to the transceiver, the transceiver will de-assert the
In_Range line after entering power-down. A Client transceiver in power-down will remain in sync with a
Server for a minimum of 2 minutes. To maintain synchronization with the Server, this Client transceiver
should re-sync to the Server at least once every 2 minutes. This re-sync is accomplished by issuing
the Power-Down Wake-Up Command
Power-Down Wake-Up CommandPower-Down Wake-Up Command
Power-Down Wake-Up Command and waiting for the In Range line to go active. Once this occurs,
the Client transceiver is in sync with the Server and can be put back into power-down.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 06h
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Byte 2 = RF Channel Number
4.3.7
4.3.74.3.7
4.3.7
Power-Down Wake-Up Command
Power-Down Wake-Up CommandPower-Down Wake-Up Command
Power-Down Wake-Up Command
The Power-Down Wake-Up Command is issued by the Host to bring the transceiver out of power-
down mode.
Host Command:
Host Command:Host Command:
Host Command:
Byte 1 = CCh
Byte 2 = 07h
Transceiver Response:
Transceiver Response:Transceiver Response:
Transceiver Response:
Byte 1 = CCh
Byte 2 = RF Channel Number