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參數(shù)資料
| 型號(hào)： | M3004LAB1 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | REMOTE CONTROL TRANSMITTER |
| 中文描述： | 遙控器 |
| 文件頁數(shù)： | 2/10頁 |
| 文件大?。?/td> | 105K |
| 代理商： | M3004LAB1 |
INPUTS AND OUTPUTS
Key matrix inputs and outputs
(DRV0N to
DRV6N and SEN0N to SEN6N)
Thetransmitterkeyboardis arrangedasascanned
matrix. The matrix consists of 7 driveroutputs and
7 sense inputs as shown in Figure 1. The driver
outputs DRV0N to DRV6N are opendrain N-chan-
nel tran-sistors and they are conductive in the
stand-by mode. The 7 sense inputs (SEN0N to
SEN6N) enable the generation of 56 command
codes.With 2externaldiodesall64 commandsare
addressable. The sense inputs have P-channel
pull-up transistors so that they are HIGH until they
are pulled LOW by connecting them to an output
viaakeydepressiontoinitiatea codetransmission.
ADDRESS MODE INPUT
(ADRM)
The sub-system address and the transmission
mode are defined by connecting the ADRM input
to one ormore driveroutputs (DRV0Nto DRV6N)
of the key matrix. If more than one driver is con-
nected to ADRM, they must be decoupled by di-
odes. This allows the definition of seven
sub-systemaddressesasshownintable3.Ifdriver
DRV6N is connected to ADRM, the data output
format of REMO is modulated or if notconnected,
flashed.
The ADRM input has switched pull-up and pull-
down loads. In the stand-by mode only the pull-
down device is active. Whether ADRM is open
(sub-system address 0, flashed mode) or con-
nected to the driver outputs,this input is LOWand
will not cause unwanted dissipation. When the
transmitter becomesactive by pressing a key, the
pull-down device is switched off and the pull-up
device is switched on, so that the applied driver
signalsare sensedfor thedecodingof the sub-sys-
tem addressand the mode of transmission.
The arrangementof the sub-systemaddress cod-
ing is such that only the driver DRVnM with the
highest number (n) defines the sub-system ad-
dress, e.g. if driversDRV2N and DRV4N are con-
nected to ADRM, only DRV4N will define the
sub-system address. This option can be used in
systems requiring more than one sub-system ad-
dress. The transmitter may be hard-wired for sub-
systemaddress2by connectingDRV1Nto ADRM.
If now DRV3N is added to ADRM by a key or a
switch, the transmitted sub-system address
changesto 4. Achangeof the sub-systemaddress
will not starta transmission.
ADRM
DD
V
V
SS
OSCILLATOR
KEYBOARD
SCAN
PULSE
DISTANCE
MODULATOR
CONTROL
LOGIC
REMO
OUTPUT
OSCI
OSCO
DRVOUTPUTS
0N 1N
2N
S
E
N
I
N
P
U
T
S
3N 4N 5N 6N
0N
1N
2N
3N
4N
5N
6N
3
BLOCK DIAGRAM
M3004LAB1 - M3004LD
2/10
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