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HCS101 Datasheet(PDF) 3 Page - Microchip Technology

Part # HCS101
Description  Fixed Code Encoder
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

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 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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