saa7803 NXP Semiconductors, saa7803 Datasheet - Page 57

• Manufacturer Part Number: saa7803
• Description: Saa7803 One Chip Cd Audio Device
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 13695
Objective data sheet
Fig 36. Top level ARM hierarchy
INTERFACE
MEMORY
DRIVER
STATIC
UNIT
LCD
6.9.1 ARM7TDMI-S™ microprocessor
6.9 ARM7 system
DRIVER
LASER
AUDIO
DAC
The following diagram identifies the component parts which make up the system. The
following sections give you a top-level description of the individual blocks.
The ARM7TDMI-S processor is a member of the ARM family of 32-bit microprocessors.
The ARM processor offers a high performance for low power consumption and low gate
count. The ARM architecture is based upon Reduced Instruction Set Computer (RISC)
principles. RISC provides the following key benefits:
Table 15:
[1]
The ARM7TDMI-S processor has 2 instruction sets:
The ARM uses a 3 stage pipeline to increase the throughput of the flow of instructions to
the processor. This allows several operations to operate simultaneously and the processor
and memory systems to operate continuously.
Process
technology
( m)
0.18
•
•
•
•
High instruction throughput
Excellent real time interrupt response.
The frequency of operation will depend on the performance required for the SAA7803 application and the
software complexity.
The 32-bit ARM instruction set
The 16-bit ARM Thumb instruction.
CONTROLLER
INTERFACE
HEADPHONE
DECODER
CHANNEL
VOLUME
Performance characteristics for ARM7TDMI-S
Performance
(MIPS/MHz)
0.9
INTERFACE
32 kB
ROM
Rev. 01 — 19 April 2005
AHB bus
VPB bus
I
2
S-BUS
ARM7TDMI-S
Power
consumption
(mW/MHz)
0.39
INTERFACE
RAM
4 kB
UART
Maximum
operating
frequency
(MHz)
67
AHB VPB
BRIDGE
CONTROLLER
INTERRUPT
Typical operating frequency
requirements for SAA7803
2 MHz
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
pDSIC
CORE
One chip CD audio device
[1]
GPIO
SAA7803
I
2
C-BUS
001aab780
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