DM303006 Microchip Technology, DM303006 Datasheet - Page 30

• Manufacturer Part Number: DM303006
• Description: KIT EVALUATION KEELOQ
• Manufacturer: Microchip Technology
• Series: KEELOQ®r
• Type: KeeLoq®r

Specifications of DM303006

• Silicon Manufacturer: Microchip
• Kit Contents: Main Board, 2 Transmitters, Cables And Power Supply
• Tool / Board Applications: General Purpose MCU, MPU, DSP, DSC
• For Use With: KeeLoq
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification
• For Use With/related Products: Keeloq Encoders & Decoders
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Request inventory verification / Request inventory verification

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FIGURE 7-9:
7.5.3
The transponder interface is left unpopulated by
default. It is provided for future expansion only and is
not supported in the initial firmware release.
The interface circuit requires a reader coil of appropri-
ate inductance connected to JP2. Capacitors C2, C3,
and C4 are used to tune the resulting resonant circuit
frequency; typically to 125 kHz.
FIGURE 7-10:
DS41155A-page 28
EE
9V-15V input
L
OQ
THE TRANSPONDER INTERFACE
transponder interface
®
EVALUATION KIT II USER’S GUIDE
THE POWER SUPPLY AND PROTOTYPING AREA
THE TRANSPONDER INTERFACE CIRCUIT
diode bridge
battery clip
+5V and GND
proto area
connector
reader coil
The PIC16F877’s second internal PWM module can
directly control the carrier signal (pin RC1), while a fil-
tered and amplified Read signal is received on the
standard RE1 I/O pin. A Write signal (pin RB0), can
also control the resonant circuit through a MOSFET
driver.
(JP2)
 2001 Microchip Technology Inc.