AeroComm Corporation PKLR2400-200 User Manual
AC5124-10 Specifications
AC5124-10 Specifications
AC5124-10 Specifications
AC5124-10 Specifications
11/24/03
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4.6.2
4.6.2
4.6.2
4.6.2 Broadcast Mode
Broadcast Mode
Broadcast Mode
Broadcast Mode
4.6.2.1
4.6.2.1
4.6.2.1
4.6.2.1 Transparent Mode Operation
Transparent Mode Operation
Transparent Mode Operation
Transparent Mode Operation
Broadcast communication in a Transparent Mode is intended for use in a point-to-multipoint network
(one Server and many Clients). In this configuration, the Server must be programmed for Broadcast
Mode by programming the Transmit Mode byte, located at EEPROM address 4Bh, to a value of 01h. It
is recommended that all Clients be programmed in Addressed Mode or Auto Destination Mode to
provide more reliable delivery of data to the Server, resulting in more efficient network communications.
(one Server and many Clients). In this configuration, the Server must be programmed for Broadcast
Mode by programming the Transmit Mode byte, located at EEPROM address 4Bh, to a value of 01h. It
is recommended that all Clients be programmed in Addressed Mode or Auto Destination Mode to
provide more reliable delivery of data to the Server, resulting in more efficient network communications.
Unlike the Transmit Attempts process in Addressed Mode, a packet will be transmitted until all
Broadcast Attempts are completed. The number of Broadcast Attempts is specified at EEPROM
address 4Eh and can be programmed with values ranging from 01h to FFh. If a transceiver receives a
packet multiple times without error, only the first error-free packet will be sent to the Host. All others will
be discarded. The OEM should carefully determine the number of Broadcast Attempts by performing
extensive testing in their application. If a packet is sent more times than necessary, network
performance can degrade.
Broadcast Attempts are completed. The number of Broadcast Attempts is specified at EEPROM
address 4Eh and can be programmed with values ranging from 01h to FFh. If a transceiver receives a
packet multiple times without error, only the first error-free packet will be sent to the Host. All others will
be discarded. The OEM should carefully determine the number of Broadcast Attempts by performing
extensive testing in their application. If a packet is sent more times than necessary, network
performance can degrade.
4.6.2.2
4.6.2.2
4.6.2.2
4.6.2.2 API Mode Operation
API Mode Operation
API Mode Operation
API Mode Operation
Sending a broadcast packet is accomplished by constructing the data frame of the
Send Data
Send Data
Send Data
Send Data
command with all six bytes of the IEEE Destination Address set to a value of FFh.
Unlike the Transmit Attempts process in Addressed Mode, a packet will be transmitted until all
Broadcast Attempts are completed, after which, a successful
Broadcast Attempts are completed, after which, a successful
Send Data Complete
Send Data Complete
Send Data Complete
Send Data Complete command will be
sent to the Host. The number of Broadcast Attempts is specified at EEPROM address 4Eh and can be
programmed with values ranging from 01h to FFh. If a transceiver receives a packet multiple times
without error, only the first error-free packet will be sent to the Host. All others will be discarded. The
OEM should carefully determine the number of Broadcast Attempts by performing extensive testing in
their application. If a packet is sent more times than necessary, network performance can degrade.
programmed with values ranging from 01h to FFh. If a transceiver receives a packet multiple times
without error, only the first error-free packet will be sent to the Host. All others will be discarded. The
OEM should carefully determine the number of Broadcast Attempts by performing extensive testing in
their application. If a packet is sent more times than necessary, network performance can degrade.
4.7
4.7
4.7
4.7 H
H
H
H
ANDSHAKING
ANDSHAKING
ANDSHAKING
ANDSHAKING
Though handshaking is not required for transceiver operation, it is recommended to achieve optimum
system performance. Most applications benefit from using Clear To Send (CTS) only, while others
may also need Request To Send (RTS). In addition, some applications may require full modem
handshaking.
system performance. Most applications benefit from using Clear To Send (CTS) only, while others
may also need Request To Send (RTS). In addition, some applications may require full modem
handshaking.
4.7.1
4.7.1
4.7.1
4.7.1 CTS Handshaking
CTS Handshaking
CTS Handshaking
CTS Handshaking
CTS is used by the transceiver to keep the Host from transmitting data to it. If the Host sends the
transceiver data when CTS is logic high (inactive), the data will be lost. Normally, CTS will go logic
high for a minimum of 40µs following the transmission of a data packet from the Host to the
transceiver. However, if the serial interface buffers on a transceiver become full and the transceiver
cannot transmit the data, the transceiver will hold CTS logic high until it can free a buffer. For example,
this can occur when a transceiver goes out of range. Therefore, it is strongly recommended that the
Host use CTS. All serial data must be transmitted LSB first.
transceiver data when CTS is logic high (inactive), the data will be lost. Normally, CTS will go logic
high for a minimum of 40µs following the transmission of a data packet from the Host to the
transceiver. However, if the serial interface buffers on a transceiver become full and the transceiver
cannot transmit the data, the transceiver will hold CTS logic high until it can free a buffer. For example,
this can occur when a transceiver goes out of range. Therefore, it is strongly recommended that the
Host use CTS. All serial data must be transmitted LSB first.