STBLC01QTR datasheet(25/40 Pages) STMICROELECTRONICS

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STLBC01

Peripherals information

The STBLC01 includes several peripherals to fulfil all the requirements of the BLE standard.

Although none of these peripherals are available for host use. This section gives a short

description of STBLC01 internal peripherals to provide a better overview of the system.

7.1

AES

The STBLC01 includes a hardware encryption/decryption accelerator based on the

advanced encryption system (AES) standard. For further information about AES please

refer to the official page of NIST (http://csrc.nist.gov/CryptoToolkit/aes/).

This block provides the following functions:

BLE encryption key calculation

BLE message integrity code (MIC) calculation

BLE encryption stream generation

7.2

Random number generator (RNG)

The STBLC01 features an RNG block which is used to generate a non-deterministic bit

stream as required in [

2]. The result of this block is a non-deterministic 32-bit stream.

7.3

Battery level detector (SVLD)

The STBLC01 offers the possibility of monitoring the supply voltage of the system. The host

can launch an SVLD measurement by sending the HCI command

STBLC_SVLD_MEASUREMENT, as defined in

Section 9. The measurement compares the

supply voltage level with a predefined voltage level described in

Table 15. After the

measurement is completed, an event is reported to the host, as described in

Section 9.3.2.

All voltages specified in

Table 15 must be considered with a precision of ±10%.

Table 15. SVLD reference

Supply

Reference

Function

VCC

2.05 V

Battery low detection

2.25 V

Battery low early warning

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