AeroComm AC5124, Руководство пользователя

Страница: 53 / 57

AC5124-10 Specifications AC5124-10 Specifications AC5124-10 Specifications AC5124-10 Specifications
11/24/03 53
8.
8. 8.
8. Initializing the AC5124 Transceiver
Initializing the AC5124 Transceiver Initializing the AC5124 Transceiver
Initializing the AC5124 Transceiver
Upon reset or power-up, a transceiver requires a minimum of 400ms for hardware initialization to
complete. During this time, CTS is driven logic high prohibiting the reception of any data or
commands. Once complete, CTS is driven logic low, allowing a transceiver to send or receive data
and commands, depending on the mode of operation.
8.1 8.1 8.1 8.1 TTTT
RANSPARENT
RANSPARENT RANSPARENT
RANSPARENT
M M M M
ODE
ODE ODE
ODE
IIII
NITIALIZATION
NITIALIZATION NITIALIZATION
NITIALIZATION
When operating in any Transparent Mode, the initialization sequence is managed by the AeroComm
protocol. API commands are not issued and there are no acknowledgements from a transceiver on
data delivery, unless the OEM protocol has built-in acknowledgements. The IN_RANGE pin (Pin 15)
provides in range information for the Transparent Modes.
8.2 8.2 8.2 8.2 API M API M API M API M
ODE ODE ODE ODE
IIII
NITIALIZATION NITIALIZATION NITIALIZATION NITIALIZATION
After the hardware initialization has completed, a transceiver operating in API Mode is ready to send
and receive API commands as outlined in Section 5, API Command Set
Section 5, API Command Set Section 5, API Command Set Section 5, API Command Set. At this point, the only
command that cannot be issued is the
Send Data
Send Data Send Data
Send Data
command. This command can only be issued after
the
RF Enable
RF Enable RF Enable
RF Enable
and
In Range
In Range In Range
In Range
commands have been issued.
Before data communications can begin, a Client needs to be authenticated. The Client Host must
issue an
RF Enable
RF Enable RF Enable
RF Enable
command to activate the Client and receive an
Acknowledge
Acknowledge Acknowledge
Acknowledge
command from the
Client. The Server transmits a beacon containing its IEEE 802.3 address. Once the Client receives the
Server beacon, it will issue an
In Range
In Range In Range
In Range
command to the Client Host containing the IEEE 802.3 Server
address. The Client Host must receive the
In Range
In Range In Range
In Range
command from the Client before the
Send Data
Send Data Send Data
Send Data
command is invoked.
The AC5124 transceivers are designed to be single threaded, meaning that for every command issued,
there is a reply command that indicates the completion of the command issued. There can be no
command interleaving.