User guide

P-2 Copyright 2013 Cirrus Logic, Inc. DS810UM6
Overview of the CS4953x4/CS4970x4 DSP
CS4953x4/CS4970x4 System Designer’s Guide
P.2.1 Chip Features
The CS4953x4/CS4970x4 include the following features:
Figure P-1 illustrates the functional block diagram for the CS4953x4/CS4970x4 DSPs.
Figure P-1. CS4970x4 Chip Functional Block Diagram
• Various Decoding/processing Standards • Customer Software Security Keys
• 12-channel Serial Audio Inputs • 16-channel PCM Output
• Dual 32-bit Audio DSP with Dual MAC • Dual S/PDIF Transmitters
• Large On-chip X,Y, and Program RAM
• Two Serial Control Ports Using SPI
™
or I
2
C
™
Standards
• Supports SDRAM Memory • Digital Audio Input (DAI) Port for Audio Data Delivery
in I
2
S or LJ Format
• Parallel Control Using Motorola
®
or
Intel
®
Communication Standards
• GPIO Support for All Common Sub-circuits
DAI
Controller
DMA Controller with 11 Stereo Channels
Programmable
Interrupt Controller
Peripheral
Bus
Controller
Memory Controller
Log/Exp
Security
Ext (64 bit)
DMA Bus
Peripheral Bus
Decryptor
32-bit Dual Datapath
DSP
with 72-bit
Accumulators
X
Y
P
X
P
Y
64 bit
Stereo Audio Output
Stereo Audio Output
Stereo Audio Output
ArbiterArbiter
Stereo Audio Output or
SPDIF Transmitter
DAO
Controller
ROM
SRAM
ROM
SRAM
ROM
SRAM
Timers
GPIOs
Clock Manager and PLL
Parallel Control Port
Serial Control Port
SDRAM Controller SRAM / FLASH Controller
Debug
Controller
DSPA
DSPB
DAO1
Stereo Audio Input/DSD
Stereo Audio Input/DSD
Stereo Audio Input/DSD
Stereo Audio Input/DSD
Stereo Audio Output
Stereo Audio Output
Stereo Audio Output
Stereo Audio Output or
SPDIF Transmitter
DAO
Controller
DAO2
DAI1
CS49700x
Stereo Audio Input /
Bursty Data Input/DSD
Stereo Audio Input/DSD
DAI2
DAI
Controller