Murata Electronics North America DNT500FP Manual Do Utilizador
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©2008 by RF Monolithics, Inc.
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DNT900 - 11/05/08
Note that 8-bit data with no parity is capable of carrying 7-bit data with parity for compatibility without loss
of generality for legacy applications that may require it.
of generality for legacy applications that may require it.
SerialControls
- this parameter affects the way the radio responds to the various serial control lines.
Enabling or disabling response to some serial control signals can facilitate communicating with devices
that support only a reduced serial interface. The parameter is defined as a bitmask, with the following
options:
that support only a reduced serial interface. The parameter is defined as a bitmask, with the following
options:
bits 7..3
Reserved
bit 2
Base DCD mode:
1 = The base will only assert DCD when at least one remote is registered (default).
0 = The base always asserts DCD, regardless of whether any remotes are attached. bit 1
RTS enable:
1 = Radio will respond to changes on the RTS control line (default).
0 = Radio ignores the RTS pin and assumes flow control is always asserted.
0 = Radio ignores the RTS pin and assumes flow control is always asserted.
bit 0
DTR/SLEEP enable.
1 = Radio will respond to changes on the SLEEP (DTR) control line (default)
0 = Radio ignores the SLEEP (DTR) pin and is always in the awake state.
0 = Radio ignores the SLEEP (DTR) pin and is always in the awake state.
4.2.5 Bank 4 - Host Protocol Settings
04
00
ProtocolMode
R/W
1
0.. 1
04
01
ProtocolOptions
R/W
1
0..255
04
02
TxTimeout
R/W
1
0..255
04
03
MinPacketLength
R/W
1
0..255
04
04
AnnounceOptions
R/W
1
0..7
04
05
TransLinkAnnEn
R/W
1
0..1
04
06
EscapeSequenceEn
R/W
1
0..2
04
07
TransPtToPtMode
R/W
1
0.. 1
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 DNT500'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 DNT500 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 a special
"escape sequence" code.
the host to understand or conform to the DNT500'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 DNT500 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 a special
"escape sequence" code.
ProtocolOptions
- this is a bitmask that selects various options for the protocol mode. The default is 0x05.
bit 7
Enable output of Instrumentation packets
bits 6..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)
Size in
Bank Loc'n
Name
R/W
bytes Range Default; Options
0 = transparent; 1 = protocol
0x05
5 ms
1 byte
0x07 all enabled
0 = disabled; 1 = <LINK> announce
0 = enabled; 1 = startup, 2 = anytime
0 = multipoint, 1 = point-to-point
0x05
5 ms
1 byte
0x07 all enabled
0 = disabled; 1 = <LINK> announce
0 = enabled; 1 = startup, 2 = anytime
0 = multipoint, 1 = point-to-point