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HCS101 Datasheet(PDF) 3 Page - Microchip Technology |
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HCS101 Datasheet(HTML) 3 Page - Microchip Technology |
3 / 20 page 1999-2013 Microchip Technology Inc. Preliminary DS41115D-page 3 HCS101 2.0 DEVICE OPERATION As shown in the typical application circuits in Figure 2- 1, the HCS101 is easy to use. It requires only the addi- tion of buttons and RF circuitry for use as the transmit- ter in your application. A description of each pin is given in Table 2-1. FIGURE 2-1: TYPICAL CIRCUITS TABLE 2-1: PIN DESCRIPTIONS The HCS101 will wake-up upon detecting a switch clo- sure and then delay for a debounce delay (TDB) as shown in Figure 2-2. The device will then update the 16-bit counter before it loads the transmit register. The data is then transmitted serially on the DATA pin in Pulse Width Modulation (PWM) format. If additional buttons are pressed during a transmission, the current transmission is terminated. The HCS101 restarts and the new transmission will contain the latest button information. When all buttons are released, the device completes the current code word and then pow- ers down. Released buttons do not terminate and/or restart transmissions. FIGURE 2-2: ENCODER OPERATION Name Pin Number Description S0 1 Switch input 0 S1 2 Switch input 1 S2 3 Switch input 2/Clock pin for Programming mode NC 4 No connection VSS 5 Ground reference connection DATA 6 Pulse Width Modulation (PWM) output pin/Data pin for Programming mode NC 7 No connection VDD 8 Positive supply voltage connection VDD B0 Tx out S0 S1 S2 NC NC VDD DATA VSS 2 button remote control B1 Tx out S0 S1 S2 NC VDD DATA VSS 4 button remote control B3 B2 B1 B0 Note: Up to 7 functions can be implemented by pressing more than one button simultaneously or by using a suitable diode array. NC VDD Power-Up RESET and Debounce Delay Sample Inputs Update Counter Load Transmit Register Buttons Added ? All Buttons Released ? (A button has been pressed) Transmit Stop No Yes No Yes Complete Code Word Transmission |
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