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AT90SCR100 Scheda tecnica(PDF) 401 Page - ATMEL Corporation

Il numero della parte AT90SCR100
Spiegazioni elettronici  8-bit Microcontroller for Smart Card Readers
PDF  433 Pages
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Produttore elettronici  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90SCR100 Scheda tecnica(HTML) 401 Page - ATMEL Corporation

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401
TPR0327AY–SMS–30Jan09
AT90SCR100
30.2.1
Recommendations
1. In Order to reduce the board parasitics, the external components for DCDC converter
should be as close as possible to the chip pins (ideally solded directly on the pins).
2. In order to have a correct current limitation, the board parasitic resistances must be
taken into account in the choice of the Rs value (e.g., if each metal line connecting Rs
to the chip adds a 10 m
Ω resistance, the correct Rs value should be 200-2x10=180mΩ)
3. CVcc and CVss lines must have very low resistance (short and wide metal line).
4. R1, R2, R3 and R4 must be placed as close as possible to the chip pins.
5. Connect e-pad to ground. If possible connect it to ground plane



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Scheda tecnica Scarica

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