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HCS410T-IST Datasheet(PDF) 5 Page - Microchip Technology |
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HCS410T-IST Datasheet(HTML) 5 Page - Microchip Technology |
5 / 36 page HCS410 2001 Microchip Technology Inc. Preliminary DS40158E-page 5 2.0 DEVICE OPERATION The HCS410 can either operate as a normal code hop- ping transmitter with one or two IFF keys (Figure 2-1) or as purely an IFF token with two IFF keys (Figure 2-2 and Figure 2-3). When used as a code hopping trans- mitter the HCS410 only needs the addition of buttons and RF circuitry for use as a transmitter. Adding the transponder function to the transmitter requires the addition of an inductor and two capacitors as shown in Figure 2-1 and Figure 2-2. A description of each pin is given in Table 2-1. Table 2-2 shows the function codes for using the HCS410. FIGURE 2-1: COMBINED TRANSMITTER/ TRANSPONDER CIRCUIT FIGURE 2-2: TRANSPONDER CIRCUIT FIGURE 2-3: 2-WIRE, 1 OR 2-KEY IFF TOKEN Figure 2-4 shows how to use the HCS410 with a 12V battery as a code hopping transmitter. The circuit uses the internal regulator, normally used for charging a capacitor/battery in LC mode, to generate a 6V supply for the HCS410. FIGURE 2-4: HCS410 ENCODER WITH 12V BATTERY FIGURE 2-5: LED CONNECTION TO S2/LED OUTPUT FIGURE 2-6: LC PIN BLOCK DIAGRAM 18 RF 2 3 4 7 6 5 1 µF 18 2 3 4 7 6 5 1 µF 18 2 3 4 7 6 5 1 µF Data I/O 18 RF 2 3 4 7 6 5 6.3V 12V Pulse VDD S2/LED 220 Ω 220 Ω 60k 30 Ω VDD 6.3V Damp Out MOD Detector Rectifier, Damping, Clamping 15V 15V 100 Ω 100 Ω LC1 LC0 |
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