M-986-2A1 Datasheet, PDF (4/13 Pages) Clare, Inc. – MF Transceiver

M-986-2A1
(5) Data is driven onto D7-D0 by the M-986 until the
RD signal is driven high by the host processor.
Clock Characteristics and Timing
Internal Clock Option: The internal oscillator is enabled
by connecting a crystal across X1 and X2/CLKIN. The
frequency of CLKOUT is one-fourth the crystal funda-
mental frequency. The crystal should be 20.48 MHz,
fundamental mode, and parallel resonant, with an
effective series resistance of 30 ohms, a power dissi-
pation of 1 mW, and be specified at a load capacitance
of 20 pF.
External Clock Option: An external frequency source
can be used by injecting the frequency directly in
X2/CLKIN with X1 left unconnected. The external fre-
quency injected must conform to the specifications list-
ed in External Frequency Specifications table on page
6.
Flammability/Reliability Specifications
Reliability:
Flammability:
185 FITS failures/billion hours
Passes UL 94 V-0 tests
2 of 6 Coding Format
Byte
Bit 7
Bit 6
Transmit tone command
1
CHN
Receive tone return
0
CHN
CHN: 1 = channel 2; 0 = channel 1
R1 MF Frequencies:
Bit name
Frequency (Hz)
F6
1700
F5
1500
F4
1300
Bit 5
Bit 4
Bit 3
F6
F5
F4
F6
F5
F4
Bit name
F3
F2
F1
Bit 2
Bit 1
Bit 0
F3F2
F1
F3F2
F1
Frequency (Hz)
1100
900
700
Binary Coding Format
Byte
Bit 7
Transmit tone command
1
Receive tone return
0
CHN: 1 = channel 2; 0 = channel 1
R1 MF Frequencies:
ABCD Frequencies (Hz)
0000
0001
0010
0011
0100
0101
0110
0111
Tone off
700 & 900
700 & 1100
900 & 1100
700 & 1300
900 & 1300
1100 & 1300
700 & 1500
4
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
CHN
0
0
A
B
C
CHN
0
0
A
B
C
Name
-
Digit 1
Digit 2
Digit 3
Digit 4
Digit 5
Digit 6
Digit 7
ABCD
1000
1001
1010
1011
1100
1101
1110
1111
www.clare.com
Frequencies (Hz)
900 & 1500
1100 & 1500
1300 & 1500
700 & 1700
900 & 1700
1100 & 1700
1300 & 1700
1500 & 1700
Bit 0
D
D
Name
Digit 8
Digit 9
Digit 0
ST3
ST1
KP
ST2
ST
Rev. 3