STA8090EXGA datasheet(23/42 Pages) STMICROELECTRONICS

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DS11733 Rev 3

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STA8090EXGA

General description

SQI Flash interface

STA8090EXGA includes a high-performance interface to Serial Quad Interface (SQI) NOR

Flash chips, to support a low-cost simple implementation.

3.4

APB peripherals

3.4.1

CAN

The 2 CAN cores perform communication according to the CAN protocol version 2.0 part A

and B. The bit rate can be programmed to values up to 1 MBit/s. For the connection to the

physical layer, additional transceiver hardware is required.

CAN consists of the CAN core, message RAM, message handler, control registers and

module. For communication on a CAN network, individual message objects are configured.

The message objects and identifier masks for acceptance filtering of received messages are

stored in the message RAM. All functions concerning the handling of messages are

implemented in the message handler. These functions include acceptance filtering, the

transfer of messages between the CAN core and the message RAM, and the handling of

transmission requests as well as the generation of the module interrupt.

The register set of the CAN can be accessed directly by the CPU through the module

interface. These registers are used to control/configure the CAN core and the message

handler and to access the message RAM.

CAN features



Supports CAN protocol version 2.0 part A and B



32 messages objects



Each message object has its own identifier mask



Maskable interrupt



Disabled automatic re-transmission mode for time triggered CAN applications



Programmable loop-back mode for self-test operation



Two 16-bit module interfaces to the AMBA APB bus from ARM

3.4.2

EFT

The Extended Function Timer (EFT) consists of a 16-bit counter driven by a programmable

prescaler.

It may be used for a variety of purposes, including pulse length measurement of up to two

input signals (input capture), generation of up to two output waveforms (output compare)

and one PWM generation. Pulse lengths and waveform periods can be modulated from a

very wide range using the timer prescaler.

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