hcs362 Microchip Technology Inc., hcs362 Datasheet - Page 5

• Manufacturer Part Number: hcs362
• Description: Keeloq Code Hopping Encoder
• Manufacturer: Microchip Technology Inc.

2.0
As shown in the typical application circuits (Figure 2-1),
the HCS362 is a simple device to use. It requires only
the addition of buttons and RF circuitry for use as the
transmitter in your security application. See Table 2-1
for a description of each pin and Figure 2-1 for typical
circuits. Figure 2-2 shows the device I/O circuits.
TABLE 2-1:
SHIFT
Name
RFEN
DATA
LED/
V
V
2002 Microchip Technology Inc.
S3/
S0
S1
S2
SS
DD
DEVICE DESCRIPTION
Number
Pin
1
2
3
4
5
6
7
8
PIN DESCRIPTIONS
Switch input 0
Switch input 1
Switch input 2 / Clock pin when in
Programming mode
Switch input 3 / RF enable output
Ground reference connection
Data output pin / DATA I/O pin for
Programming mode
Cathode connection for LED and
DUAL mode SHIFT input
Positive supply voltage
Description
Preliminary
FIGURE 2-1:
c) Four button remote control with RF Enable
b) Four button remote control
d) DUAL key, four buttons remote control
B0
B1
a) Two button remote control
B0
B1
B2
B3
B3 B2 B1 B0
B3 B2 B1 B0
Note:
V
V
with PLL output (Note)
DD
DD
Up to 15 functions can be implemented by
pressing more than one button simulta-
neously or by using a suitable diode array.
TYPICAL CIRCUITS
S0
S1
S2
S3
S0
S1
S2
S3
S0
S1
S2
RFEN
S0
S1
S2
S3
LED/SHIFT
DATA
DATA
LED
V
V
LED
V
V
DD
SS
DATA
DD
SS
DATA
LED
V
V
V
V
DD
SS
DD
SS
HCS362
V
DD
DS40189D-page 5
V
DD
1 KW
SHIFT
Tx out
Tx out
PLL control
Tx out
Tx out