A71CL datasheet(7/24 Pages) NXP

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485030

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Product short data sheet

COMPANY PUBLIC

Rev. 3.1 — 24 September 2020

485031

7 of 24

NXP Semiconductors

A71CL

Plug & Trust Secure Element for Alibaba Cloud

Functional description

6.1 Functional diagram

The A71CL uses I2C as communication interface as described in the following section.

The A71CL commands are wrapped using the Smartcard I2 protocol (SCI2C). The

detailed documentation for the A71CL commands [ref to APDU Spec] and SCI2C

encapsulation (Ref. 3) is available in NXP docstore.”

In order to simplify the product usage a host library was created which takes care for the

A71CL commands and SCI2C protocol encapsulation. The host library is available on the

A71CL website. The APDU specification is available for download with complete sources

on the A71CL website.

6.2 I2C Interface

The A71CL has an I2C interface in slave mode, supporting data rates up to 400 kbit/s

operating in Fast-Mode (FM). The I2C interface is using the Smartcard I2C protocol as

defined in Ref. 3 which is based on SMBus. Depending on the interface pins state at boot,

see Section 7 for more details. The default I2C address after power-on-reset depends on

the bootup condition as shown in Table 4.

Fig 2.

A71CL functional diagram - example Open SSL

A71CL Datasheet(PDF) 7 Page - NXP Semiconductors