ATA8743 Datasheet PDF - ATMEL Corporation

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ATA8743
ATMEL Corporation

Part Number ATA8743
Description Microcontroller
Page 30 Pages


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ATA8743
Microcontroller with UHF ASK/FSK Transmitter
DATASHEET
Features
Transmitter with microcontroller consisting of an AVR® microcontroller and RF
transmitter PLL in a single QFN24 5mm × 5mm package (pitch 0.65mm)
f0 = 868MHz to 928MHz
Temperature range –40°C to +85°C
Supply voltage 2.0V to 4.0V allowing usage of single li-cell power supply
Low power consumption
Active mode: Typical 9.8mA at 3.0V and 4MHz microcontroller-clock
Power-down mode: Typical 200nA at 3.0V
Modulation scheme ASK/FSK
Integrated PLL loop filter
Output power of 5.5dBm at 868.3MHz
Easy to design-in due to excellent isolation of the PLL from the PA and power
supply
Single-ended antenna output with high efficient power amplifier
Very robust ESD protection: HBM 2500V, MM100V, CDM 1000V
High performance, low power AVR 8-bit Microcontroller, similar to popular Atmel®
ATtiny44
Well known and market-accepted RISC architecture
Non-volatile program and data memories
4Kbytes of in-system programmable program memory flash
256 bytes in-system programmable EEPROM
256 bytes internal SRAM
Programming lock for self-programming flash program and EEPROM data security
Peripheral features
Two Timer/Counter, 8- and 16-bit counters with two PWM channels on both
10-bit ADC
On-chip analog comparator
Programmable watchdog timer with separate on-chip oscillator
Universal serial interface (USI)
9152D-INDCO-09/14



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Special microcontroller features
debugWIRE on-chip debug system
In-system programmable via SPI port
External and internal interrupt sources
Pin change interrupt on 12 pins
Enhanced power-on reset circuit
Programmable brown-out detection circuit
Internal calibrated oscillator
On-chip temperature sensor
12 programmable I/O lines
2 ATA8743 [DATASHEET]
9152D–INDCO–09/14



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1. General Description
The Atmel® ATA8743 is a highly flexible programmable transmitter containing the AVR® microcontroller Atmel ATtiny44V
and the UHF PLL transmitters in a small QFN24 5mm × 5mm package. This device is a member of a transmitter family
covering several operating frequency ranges, which has been specifically developed for the demands of RF low-cost data
transmission systems with data rates of up to 32Kbit/s. Its primary applications are in the areas of industrial/aftermarket
remote keyless-entry (RKE) systems, alarm, telemetering, energy metering systems, home automotion/entertainment and
toys. The Atmel ATA8743 can be used in the frequency band of f0 = 868MHz for ASK or FSK data transmission.
Figure 1-1. ASK System Block Diagram
UHF ASK/FSK
Remote Control Transmitter
S1 PXY
S1 PXY
S1 PXY
PXY
PXY
PXY
PXY
ATA8743
ATtiny44V
VDD
GND
PXY
PXY
PXY
PXY
PXY
VS
ATA8403
Power
up/down
f/4 PLL
CLK
XTO
VCO
PA
ENABLE
GND_RF
UHF ASK/FSK
Remote Control Receiver
ATA8205
Demod
Control
1 to 6 Micro-
controller
VCC_RF
VS
PA_ENABLE
ANT2
ANT1
Antenna
Loop
Antenna
VS
LNA
PLL XTO
VCO
ATA8743 [DATASHEET]
9152D–INDCO–09/14
3



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Figure 1-2. FSK System Block Diagram
UHF ASK/FSK
Remote Control Transmitter
S1 PXY
S1 PXY
S1 PXY
PXY
PXY
PXY
PXY
ATA8743
ATtiny44V
VDD
GND
PXY
PXY
PXY
PXY
PXY
VS
ATA8403
Power
up/down
f/4 PLL
CLK
XTO
VCO
PA
ENABLE
GND_RF
UHF ASK/FSK
Remote Control Receiver
ATA8205
Demod
Control
1 to 6 Micro-
controller
VCC_RF
VS
PA_ENABLE
ANT2
ANT1
Antenna
Loop
Antenna
VS
LNA
PLL XTO
VCO
4 ATA8743 [DATASHEET]
9152D–INDCO–09/14



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