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DNT2400 - 08/18/09
4.2.5 Bank 4 - Host Protocol Settings
Size in
Bank Loc'n Name
R/W
bytes Range Default;
Options
04
00
ProtocolMode
R/W
1
0..1
0 = transparent; 1 = protocol
04
01
ProtocolOptions R/W
1
0..255
0x05
04
02
TxTimeout R/W
1
0..255
0 ms
04
03
MinPacketLength
R/W
1
1..255
1 byte
04
04
AnnounceOptions
R/W
1
0..7
0x07 all enabled
04
05
TransLinkAnnEn
R/W
1
0..1
0 = disabled; 1 = <LINK> announce
04
06
ProtocolSequenceEn R/W
1
0..2
0 = disabled; 1 = startup, 2 = anytime
04
07
TransPtToPtMode
R/W
1
0..1
0 = multipoint, 1 = point-to-point
ProtocolMode - this parameter selects the host protocol mode. The default is 0, which is transparent
mode, meaning the radio conveys whatever characters that are sent to it transparently, without requiring
the host to understand or conform to the DNT2400's built-in protocol. This setting is recommended for
point-to-point applications for legacy applications such as wire replacements where another serial proto-
col may already exist. Setting this parameter to 1 enables the DNT2400 host protocol, which is recom-
mended for point-to-multipoint applications and is preferred for new designs. It is not necessary to define
the same protocol mode for all radios in a network. For example, it is frequently useful to configure all the
remotes for transparent mode and the base for protocol mode. Note that it is possible for the host to
switch the radio from transparent mode to protocol mode and back if desired by transmitting an EnterPro-
tocolMode command.
ProtocolOptions - this is a bitmask that selects various options for the protocol mode. The default is 0x05.
bits 7..3 Reserved
bit
2
Enable output of TxReply packets
bit 1 Reserved
bit 0
Enable output of Announce packets
AnnounceOptions - this is a bitmask that enables/disables different types of Announce packets:
bit 7..3
Reserved
bit
2
Enable bit for Announce types E0-EA (error notification)
bit 1
Enable bit for Announce types A1-A7 (<LINK> notifications)
bit 0
Enable bit for Announce types A0 (initialization)
TxTimeout - this parameter is the transmit timeout used for determining message boundaries in transpar-
ent data mode. Units are in milliseconds. A message boundary is determined whenever a gap between
consecutive characters is equal to or greater than the TxTimeout value, or the number of bytes reaches
the MinPacketLength. Either condition will trigger a transmission. The default TxTimeout value is 0 ms.
MinPacketLength - sets the minimum message length used for determining packet boundaries in trans-
parent data mode. The default is one byte. A transmission is triggered when either the number of bytes
reaches MinPacketLength or a gap is detected between consecutive characters greater than TxTimout.
TransLinkAnnEn - enables a link announcement function for transparent mode. Whenever link is acquired
or dropped, the strings "<LINK>" or "<DROP>" are sent to the local host.
ProtocolSequenceEn - enables or disables the EnterProtocolMode ASCII command string to switch from
transparent mode to protocol mode. Valid settings are 0 = disabled, 1 = one time at startup, 2 = enabled
at any time. The default is enabled at anytime.
TransPtToPtMode- controls the behavior for addressing packets in transparent mode. When this setting is
zero (default), in transparent mode the base will direct packets to the broadcast address. This is useful for
