HCS500_11 Datasheet, PDF (29/40 Pages) Microchip Technology – KEELOQ® Code Hopping Decoder encoders to implement a unidirectional

FIGURE 9-2: TYPICAL MICROCONTROLLER INTERFACE CIRCUIT
HCS500
VCC
RF
Receiver
1
2
3
4
A0
A1
A2
VSS
VCC
WP
SCL
SDA
8
7
6
5
24LC02B
1K
1
2
3
4
VDD
EECLK
EEDAT
MCLR
VSS
RFIN
SCLK
SDAT
8
7
6
5
HCS500
10K
VCC
Power Supply
Supervisor
Vi
RST
MCP100-4.5
Microcontroller
CLOCK
DATA
MCLR
In-circuit
Programming
Probe Pads (Note)
Note: Because each HCS500 is individually matched to its EEPROM, in-circuit programming is
strongly recommended.
© 2011 Microchip Technology Inc.
DS40153D-page 29