RFHCS362G_11 datasheet(8/54 Pages) MICROCHIP

8 / 54 page

rfHCS362G/362F

DS41189B-page 8

2.0

DEVICE DESCRIPTION

The block diagram in Figure 2-1 shows the internal

configuration with the top half representing the encoder

and the bottom half the UHF transmitter. Note that con-

nections between the encoder and transmitter are

made external to the device for more versability.

Typical application circuits are shown in Figure 1-5 and

Figure 1-6. The rfHCS362G/362F requires only the

addition of push button switches and few external com-

ponents for use as a transmitter in your security appli-

cation. See Table 2-1 for pinout description. Figure 2-2

shows the device I/O circuits.

FIGURE 2-1:

rfHCS362 BLOCK DIAGRAM

VSS

VDD

Oscillator

RESET Circuit

LED Driver

Controller

Power

Latching

and

Switching

Button Input Port

32-bit Shift Register

Encoder

EEPROM

DATA

LED

S3 S2 S1 S0

SHIFT

PLL Driver

RFEN

RFENIN

Divide

by 4

Mode

Control

Logic

CLKOUT

Power

Amplifier

(PA)

Crystal

Oscillator

ANT2

ANT1

XTAL

Phase

Detector

and

Charge Pump

Voltage

Controlled

Oscillator

(VCO)

Fixed

Divide

by 32

PS/DATAASK

DATAFSK (1)

FSKOUT (1)

FSK Switch

VDDRF

VSSRF

Note 1: rfHCS362F only.

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