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ATECC508A 데이터시트(PDF) 94 Page - Microchip Technology

부품명 ATECC508A
상세설명  Cryptographic Co-processor with Secure Hardware-Based Key Storage
PDF  109 Pages
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제조업체  MICROCHIP [Microchip Technology]
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ATECC508A 데이터시트(HTML) 94 Page - Microchip Technology

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11.
Mechanical
11.1
Wiring Configuration for Single-Wire Interface
Using the Single-Wire Interface allows the connection of ATECC508A to a host using only a single pin
(SDA) to transfer data in both directions. This interface does not use the SCL pin, which should be tied to
ground.
To prevent forward biasing the internal diode and drawing current across power planes in the system, the
resistor pull-up on the SDA pin should either be connected to the same supply that is connected to the
VCC pin or to a lower voltage rail.
If the signal levels for SDA are different than the VCC voltage, consult the parametric specifications
section of this document to ensure that the signal levels are such that excessive leakage current will be
minimized when in sleep modes. This situation might occur if the ATECC508A device is physically distant
from the bus master device and the supply voltage for the bus master is different than the supply voltage
for ATECC508A.
Figure 11-1. 3-wire Configuration for Single-Wire Interface
ATECC508A
Mechanical
© 2017 Microchip Technology Inc.
Datasheet Complete
DS20005927A-page 94



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