ATECC508A datasheet(94/109 Pages) MICROCHIP

номер детали	ATECC508A

подробное описание детали	Cryptographic Co-processor with Secure Hardware-Based Key Storage

PDF	109 Pages

Scroll/Zoom	100%

производитель	MICROCHIP [Microchip Technology]

домашняя страница	http://www.microchip.com

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94 / 109 page

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

Datasheet Complete

DS20005927A-page 94

ATECC508A датащи(PDF) 94 Page - Microchip Technology