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KRX416-000-SS Datenblatt(PDF) 2 Page - Radiometrix Ltd

Teilenummer KRX416-000-SS
Bauteilbeschribung  Code-hopping decoder with 4 outputs
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Hersteller  RADIOMETRIX [Radiometrix Ltd]
Direct Link  http://www.radiometrix.com
Logo RADIOMETRIX - Radiometrix Ltd

KRX416-000-SS Datenblatt(HTML) 2 Page - Radiometrix Ltd

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Radiometrix Ltd
KRX416
page 2
Typical Application Circuit
Figure 2: KRX416 Function-Code display - example circuit
Pin
Name
Input/Output
Description
1
LRN
Input
Normally held-high: Momentarily connect to 0V to enter Learn Mode
– stays in Learn Mode until a compatible Radiometrix transmitter is
successfully learned or time-out occurs in approx. 18s.
Connect to 0V for more than 10s (approx.) to clear NV memory: this
removes all learnt transmitters.
2
LED-L
Output1
Active high during Learning Phase – A code-hopping transmitter is
Learnt during this time by receiving and decoding its transmission.
Pin 2 then cycles low-high-low for a short period (flashes the LED) to
indicate that a transmitter has been Learned.
If Pin 1 is held low >10s Pin 2 goes low then momentarily high again
(when Pin 1 returned high) to indicate NV Memory has been cleared.
Active high (10ms or for as long as S0-S3 are active) when not in
Learn Mode to indicate that the IC has decoded a Function Code (S0-
S3 state) that was used previously in Learning a Transmitter.
3
NC
-
Do not connect anything to this pin
4
RST
Input
Normally held high. Taken low this pin will Reset the IC. The NV
Memory is unaffected.
5
Vss
Supply
Supply Ground
6
S0
Output1
Function Code output S0 – active high 10ms pulse2 or a 350-500ms
pulse and held high for repeat messages (see “Mode” description)
7
S1
Output1
Function Code output S1 – operation as above
8
S2
Output1
Function Code output S2 – operation as above
9
S3
Output1
Function Code output S3 – operation as above
10
NC
-
Do not connect anything to this pin
11
LED-V
Output1
Active high when the received message indicates that the
Transmitter encoder power supply is below 3.8V (approx.)
12, 13
NC
-
Do not connect anything to this pin
14
Vdd
Supply
4.5-5.5V supply (decouple with 0.1µF close to IC)
15, 16
NC
-
Do not connect anything to this pin
17
RXD
Input
Data input from receiver, also connect to Vdd via 10k (no input =1)
18
MODE
Input3
Can be held high or low. When high, outputs S0-S3 are active only
for a brief period but when Mode is held low a “latency” is effected.
Vss
LRN
Vdd
NC
NC
LED-V
NC
LED-L
NC
MODE
RXD
NC
NC
5V
supply
RST
470R
100nF
S0
470R
470R
470R
470R
470R
S1
S2
S3
Push-to-Learn
1k
Vcc
GND
RXD
RF


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