W55MID50 Datasheet, PDF (7/12 Pages) Winbond – WINBOND MFID READER

System Description
2.1 W55MID50 System Block Diagram
W55MID50
Reset &
Power down
Control
Command
Extractor
Voltage
Regulator
Oscillation circuit
13.56 MHz
Configuration
Register
Preamble
&
Data Clk
Generator
TXD
PA
Data-
Buff.
output
Data-
Buff.
II
Data-
Buff.
I
Decoder
(NRZ/
Man.)
Envelope detector
&
Analog Front End
2.2 W55MID50 Functional Description
Transmission Power Amplifier (PA)
It provides 4 different selectable transmission power for Reader chip to support MFID Tag's
radiation power supply. The external inductor coupling circuit is designed for 13.56 MHz magnetic field
resonance. The coupled center frequency will depend on equivalent value of external PCB inductor and
capacitor.
Envelope Detector & Analog Front End
The major function of this unit provides MFI^B Tag's data can be extracted.
Voltage Regulator
The voltage regulator generates the system needs of device power supply.
Configuration Register
System configuration register controls the all functional settings of W55MID50 such as Tag data
format, Tag detection cycle, output data format, and PA transmission power selection.
Reset and Power-down Control
The function of system power-down control mode is normally used for power consumption saving.
Crystal Oscillation
The 13.56 MHz system clock generator generates the need of device system clock.
Nuvoton Technology Corp.,
7
Revision: A7.0
Publish Date: May 2016