TDA7590_09 datasheet(20/42 Pages) STMICROELECTRONICS

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DSP peripherals

TDA7590

20/42

The key features of the host interface are:

●

8 bit parallel port "Full-duplex" dedicated host register bank

●

Dedicated Mozart™ core DSP register core bank.

●

3 transfer modes:

–

host command

–

Host to Mozart core DSP

–

Mozart core DSP to host

●

Access protocols:

–

Software polled

–

Interrupt

–

DMA access by the Mozart core DSP core

●

2+ wait states clock cycles per transfer

●

Supported instructions:

–

Data transfer between Mozart core and external host using Mozart MOVE

instruction

–

Simple I/O service routine with bit addressing instructions

–

IO service using fast interrupts with MOVEP instructions.

7.5

ESSI

The ESSI peripheral enables serial-port communication between the DSP core and external

devices including Codecs, DSP, microprocessors. The ESSI is capable of driving 12

programmable external pins which can be configured as GPIO ports C and D or ESSI pins.

The key features of the ESSI are:

●

Independent receiver and transmitter

●

Synchronous or asynchronous channel modes synchronous. Receiver and transmitter

use same clock/sync asynchronous. Receiver and transmitter may use separate

clock/sync up to one transmitter enabled in asynchronous channel mode.

●

Up to three transmitters enabled in synchronous channel mode.

●

Normal mode. One word per period.

●

Network mode. Up to 32 words per period.

7.6

EOC

The Salieri extended on-chip memory interface provides access to 40 kB of on-chip

memory. The Mozart core will treat this memory as if it were external. Access by off-chip

expansion bus masters is permitted. All accesses to the extended on-chip RAM are

controlled by the extended on-chip memory control register. This register determines which

combinations of the Address attribute pins should be interpreted as accesses to the 40 kB of

RAM.

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