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PCIF0 Folha de dados(PDF) 5 Page - ATMEL Corporation

Nome de Peças PCIF0
Descrição Electrónicos  High Performance, Low Power Atmel AVR 8-bit Microcontroller Advanced RISC Architecture
PDF  294 Pages
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Fabricante Electrônico  ATMEL [ATMEL Corporation]
Página de início  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

PCIF0 Folha de dados(HTML) 5 Page - ATMEL Corporation

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5
9219A–RFID–01/11
Atmel ATA5505 [Preliminary]
Figure 1-3.
Block Diagram
Figure 1-4 shows the front end in more detail. The circuit block depicted consists of the
receiver, an internal oscillator and driver for the coil, and a power supply unit.
Figure 1-4.
Reader Front End Block Diagram
Control (0 to 3)
PB (0 to 7)
DGND
Input
COIL2
COIL1
Flash
Power / Reset
Reader Frontend
AVR CPU
LIN / UART
EEPROM
Watchdog
Atmel ATA5505
SRAM
Timer
SPI
A/D
converter
Port B
Port A
AVCC
V
CC
GND
AGND
Input
PA (0 to 7)
Power supply
DV
S
V
EXT
Frequency
adjustment
&
&
Schmitt trigger
Frontend
Standby
MS
CFE
OE
Output
RF
Control (0 to 3)
DGND
Input
COIL2
COIL1
Oscillator
= 1
Lowpass filter
HIPASS
V
S
V
Batt
Driver



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