System description

STA1080, STA1085, STA1090, STA1095

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DocID028279 Rev 1

2.7

Secure CAN subsystem

Accordo2 family devices allow isolating critical code from main application by implementing

a dedicated subsystem based on ARM Cortex-M3, along with:

256 KB dedicated embedded SRAM



Dedicated embedded SRAM



CAN controller



Dedicated GPIOs

In order to guarantee security of CAN network, it can be completely isolated from the rest of

the system, in such a way that no application running on Cortex-R4 can access by any

mean to CAN specific resources. The secure sub-system communicates with the

application running on Cortex-R4 using a Hardware Mailbox interrupt based mechanism.

A specific set of peripherals can be reserved and locked to be only accessible from

CortexM3, thus allowing a complete independent subsystem. In addition to that, specific

secure GPIOs as well as wake signals are reserved to such system.

2.8

General purpose ADC

Accordo2 family devices have general purpose ADCs with a resolution of 10-bits.

2.9

GPIOs

Accordo2 family devices have GPIOs which can be independently configured either as

INPUT or OUTPUT. In order to make the system flexible, these IOs are multiplexed on PINs

with other peripherals.

2.10

Generic interfaces

2.10.1

UARTS



Programmable baud rates up to3Mbps



Hardware Flow control



DMA capability

2.10.2



Master/slave modes in multi-master environment



Multiple baud rates supported: 100/400/1000/3400 Kbits/s



DMA capability