BLUENRG-2 datasheet(15/190 Pages) STMICROELECTRONICS

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BlueNRG-2

Functional details

DocID030675 Rev 2

15/190

Functional details

The BlueNRG-2 integrates:



ARM Cortex-M0 core



Interrupts management



256 KB Flash memory



24 KB of RAM with two retention options (12 KB or 24 KB)



Power management



Clocks



Bluetooth low energy radio



Random number generator (RNG) (reserved for Bluetooth low energy protocol stack,

but user applications can read it)



Public Key Cryptography (PKA) (reserved for Bluetooth low energy protocol stack)



Peripherals:



SPI interface



UART interface



I²C bus interface



GPIO



Multifunction timer



DMA controller



Watchdog



RTC



ADC with battery indicator and temperature sensor



PDM stream processor

3.1

Core

The ARM® Cortex®-M0 processor has been developed to provide a low-cost platform that

meets the needs of MCU implementation, with a reduced pin count and low-power

consumption, while delivering outstanding computational performance and an advanced

system response to interrupts.

The ARM® Cortex®-M0 32-bit RISC processor features exceptional code-efficiency,

delivering the high-performance expected from an ARM core in the memory size usually

associated with 8-bit and 16-bit devices.

The BlueNRG-2 has an embedded ARM core and is therefore compatible with all ARM

tools and software.

3.2

Interrupts

The Cortex-M0 nested vector interrupt controller (NVIC) handles interrupts. The NVIC

controls specific Cortex-M0 interrupts (address 0x00 to 0x3C) as well as 32-user interrupts

(address 0x40 to 0xBC). In the BlueNRG-2 device, the user interrupts are connected to the

interrupt signals of the different peripherals.

Table 2: BlueNRG-2 interrupt vectors

Position

Priority

Priority type

Description

Address

Initial main SP

0x0000_0000

-3

Fixed

Reset handler

0x0000_0004

-2

Fixed

NMI handler

0x0000_0008

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