M-986-2R2 Datasheet, PDF (3/13 Pages) Clare, Inc. – MFC Transceivers

M-986-2R2
A Transmit Tone Command written while the transceiv-
er is in STATE 1 will be acted upon immediately. The
transmitter is unconditionally disabled upon entry into
STATE 2. If a transmit command is written to the trans-
ceiver while in STATE 2, that command will become
pending. Upon entry into STATE 1, a pending transmit
command is acted upon.
In backward mode, the transceiver can exist in two
states, STATE 1 and STATE 2:
STATE 1: No forward signal detected.
Transmitter off unconditionally.
STATE 2: Forward signal detected.
Transmitter transmits backward signal.
A transmit tone command written while the transceiver
is in STATE 2 will be acted upon immediately. The
transmitter is unconditionally disabled upon entry into
STATE 1. If a transmit command is written to the trans-
ceiver while in STATE 1, that command will become
pending. Upon entry into STATE 2, a pending transmit
command is acted upon.
EXAMPLE: Assume that the transceivers at both ends
of a link are configured in automatic compelled mode.
Both transceivers are in STATE 1. A compelled signal-
ing sequence begins with the R2F host writing a trans-
mit command byte to its transceiver via the
coprocessor bus. The transceiver immediately begins
transmitting the signal.
Automatic Compelled Mode Operation
2 of 6 Coding Format
Byte
Bit 7
Transmit tone command
1
Receive tone return
0
CHN: 1 = channel 2; 0 = channel 1
R2 MF Frequencies:
Bit name
F6
F5
F4
Forward (Hz)
1980
1860
1740
Bit 6
Bit 5
Bit 4
CHN
F6
F5
CHN
F6
F5
Backward (Hz)
540
660
780
Bit name
F3
F2
F1
Bit 3
Bit 2
F4
F3
F4
F3
Forward (Hz)
1620
1500
1380
Bit 1
Bit 0
F2
F1
F2
F1
Backward (Hz)
900
1020
1140
Binary Coding Format
Byte
Bit 7
Transmit tone command
1
Receive tone return
0
CHN: 1 = channel 2; 0 = channel 1
R2 MF Frequencies:
ABCD
0000
0001
0010
0011
0100
0101
0110
0111
Forward (Hz)
Tone off
1380 & 1500
1380 & 1620
1500 & 1620
1380 & 1740
1500 & 1740
1620 & 1740
1380 & 1860
Rev. 3
Bit 6
Bit 5
Bit 4
CHN
0
0
CHN
0
0
Backward (Hz)
Tone off
1140 & 1020
1140 & 900
1020 & 900
1140 & 780
1020 & 780
900 & 780
1140 & 660
ABCD
1000
1001
1010
1011
1100
1101
1110
1111
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Bit 3
Bit 2
Bit 1
Bit 0
A
B
C
D
A
B
C
D
Forward (Hz)
1500 & 1860
1620 & 1860
1740 & 1860
1380 & 1980
1500 & 1980
1620 & 1980
1740 & 1980
1860 & 1980
Backward (Hz)
1020 & 660
900 & 660
780 & 660
1140 & 540
1020 & 540
900 & 540
780 & 540
660 & 540
3