M3004LD Просмотр технического описания (PDF) - STMicroelectronics
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M3004LD Datasheet PDF : 10 Pages
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M3004LAB1 - M3004LD
Table 1 : Pulse Train Timing
Mode
Flashed
Modulated
TO (ms)
2.53
2.53
tP (µs)
8.8
-
tM (µs)
-
26.4
tML (µs)
-
17.6
tMH (µs)
-
8.8
tW (ms)
121
121
fOSC
455kHz
tOSC = 2.2µs
tP
4 x tOSC
Flashed Pulse Width
tM
12 x tOSC
Modulation Period
tML
8 x tOSC
Modulation Period Low
tMH
4 x tOSC
Modulation Period High
tW
55296 x tOSC
Word Distance
TO
1152 x tOSC
Basic Unit of Pulse Distance
The following number of pulses may be selected by Metal option : N = 8, 12, 16.
Note : The different dividing ratio for TO and tW between flash mode and carrier mode is obtained by changing the modulo of a particular di-
vider from divide by 3 during flash mode to divide by 4 during carrier mode. This allows the use of a 600kHz ceramic resonator dur-
ing carrier mode to obtain a better noise immunity for the receiver without a significant change in TO and tW. For first samples, the
correct divider ration is obtained by a metal mask option. For final parts, this is automatically done together with the selection of
flash-/carrier mode.
Table 2 : Pulse Train Separation (tb)
Logic ”0”
Logic ”1”
Toggle Bit Time
Reference Time
Code
Table 3 : Transmission Mode and Sub-system
Adress Selection.
The sub-system address and the transmission
mode are defined by connecting the ADRM input
Mod e
Sub-system Address
#
S2
S1
S0
0
F
0
1
1
1
L
1
0
0
0
O
A
2
0
0
1
X
S
3
0
1
0
X
H
4
0
1
1
X
E
5
1
0
0
X
D
6
1
0
1
X
M
O
0
1
1
1
D
1
0
0
0
O
U
2
0
0
1
X
L
3
0
1
0
X
A
4
0
1
1
X
T
5
1
0
0
X
E
6
1
0
1
X
D
O= connected to ADRM
blank= not connected to ADRM
X = don’t care
tb
2 x TO
3 x TO
2 x TO or 3 x TO
3 x TO
to one or more driver outputs (DRV0N To DRV6N)
of the key matrix. If more than one driver is con-
nected to ADRM, they must be decoupled by di-
odes.
Driver DRVnN for n =
1
2
3
4
5
6
O
X
O
X
X
O
X
X
X
O
X
X
X
X
O
O
O
O
O
X
O
O
X
X
O
O
X
X
X
O
O
X
X
X
X
O
O
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