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6399A–DRMSD–13-Oct-08

ATSAM2553

3.

ATSAM2553 Internal Architecture

Figure 3-1.

Internal Architecture

The highly integrated architecture of the ATSAM2553 combines a specialized high-performance

RISC-based digital signal processor (DSP) and a general purpose 16-bit CISC-based control

processor (P16). An on-chip memory management unit (MMU) allows the DSP and the control

processor to share an internal 32K x 16 RAM as well as external ROM and/or RAM memory

devices. An intelligent peripheral I/O interface function handles other I/O interfaces, such as the

on-chip MIDI UART and 3 timers, with minimum intervention from the control processor. A key-

board/switches/sliders/LEDs autonomous scanning interface handles the specific music

instrument peripherals, including accurate keyboard velocity detection and communicates with

the control processor through a dedicated 304x11 dual port RAM. An LCD display interface

allows direct connection to common LCD displays

P16

Proces s or

256x16 RAM

512x16 ROM

64 Slots DSP

with

Algorithm s in

RAM

Memory

Manager

Unit

32k x 16

SRAM

MIDI UART

3 x Tim ers

Control &

Status regs

128 x 16

Scanning

RAM

Keyboards

Switches

Sliders

LEDs

Scanning I/F

DACLK

DABDx

DAAD

CLBD

WSBD

RUN

VCCBAT

A0-A23

D0-D15

RD/, WR/

CSx/

XIOx/

-4

8 bit ADC

MIDI IN/OUT

GPIO0

KBD|IO/

ROW0-2

BR0-10

MK0-10

VREFP

VREFN

VIN

Clock &

PLL

X1,X2

LFT

RESET/

PDWN/

DEBUG/

LCD

dis play

Interface

DB0-DB7

RS

R/W

E

A0-A24

D0-D15

RD/, WR/

CSx/

XIO/

MIDI IN/OUT

P0-3

KBDIO/

ROW0-3

BR0-10

MK0-10

304 x 11

VA33

AGND

VIN

10-bit ADC

DB0-DB7

RS

RW

ENB