Rainbow Electronics AT86RF401 - Manual

1
Features
• RF Frequency Range of 264–456 MHz
• 6 dBm RF Output into Matched Antenna
• RF Output Power Adjustable over 36 dB with 1 dB Resolution
• Phase-locked Loop (PLL) Based Frequency Synthesizer
• Supports OOK Modulation
• Data Bandwidth of Up to 10 Kbps Manchester
• 2-volt Operation
• 8-bit AVR
â
RISC Microcontroller Core
• Minimal External Components
• Space-saving 20-lead TSSOP
• 2 KB (1K x 16) of Flash Program Memory
• 128 Bytes of EEPROM
• 128 Bytes of SRAM
• In-system Programmable Data and Program Memory
• Six I/Os (Serial I/F, LED Drive Outputs, Button Input Interrupts)
• Low Battery Detect and Brown-out Protection
• Software Fine-tuning of VCO Tank Circuit
Applications
• Remote Keyless Entry (RKE) Transmitters
• Wireless Security Systems
• Home Appliance Control (Lighting Control, Ceiling Fans)
• Radio Remote Control (Hobby, Toys)
• Garage Door Openers
• Wireless PC Peripherals (Keyboard, Mouse)
• Telemetry (Tire Pressure, Utility Meter, Asset Tracking)
Description
The Atmel AT86RF401 Smart RF ™ Microtransmitter is a highly integrated, low-cost RF
transmitter, combined with an AVR RISC microcontroller. It requires only a crystal, a
single LiMnO
2
coin cell (CR2032 or similar), three capacitors, an inductor and a tuned-
loop antenna to implement a complete on-off keyed (OOK) wireless RF data
transmitter.
Figure 1. Block Diagram
PHASE
DETECTOR
OSCILLATOR
LOOP
FILTER
VCO
PRESCALER
÷
24
RF
AMP
LOOP FIL
CLOCK
RESET
WATCHDOG
LOW-VOLTAGE DETECT
BROWN-OUT PROTECT
AVR RISC µC
2 KB Flash Program Memory
128 Bytes EEPROM Data Memory
L1 L2
DATA GAIN
TRIM
POWER
SUPPLY
SUPERVISOR
XTAL/CLK
XTALB
AVDD
AGND
ANT
ANTB
B +
D
VDD
DGND
IO5 IO4 IO3
SCK/IO2 SDO/IO1
SDI/IO0
RESETB
CFIL
Smart RF
™
Wireless Data
Microtransmitter
AT86RF401
Preliminary
1424D–RKE–09/02