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ACU7503 Schematic ( PDF Datasheet ) - ETC

Teilenummer ACU7503
Beschreibung second generation highly-integrated digital music system solutions
Hersteller ETC
Logo ETC Logo 




Gesamt 28 Seiten
ACU7503 Datasheet, Funktion
www.DataSheet4U.com
ACU7503 Datasheet
Latest Version: 1.3






ACU7503 Datasheet, Funktion
ACU7503PRODUCT DATASHEET
1 Introduction
The ACU7503 is one of the ACU750x Single-cell Series SOC which is the second
www.DataSheet4U.com generation highly-integrated digital music system solutions for devices such as audio players
and photo viewers. Besides an audio decoder with a high performance DSP that has built-in
RAM and ROM, the ACU7503 includes ADPCM record capabilities and USB interface for
downloading and uploading. It also provides interface for flash memory, LED/ OLED/color
LCD, buttons and switch inputs, headphone, microphone, and FM radio input and control.
The ACU7503 has programmable architecture supporting the WMA and other digital audio
standards. For storage device, it can act as a USB mass storage slave device to personal
computer system. ACU7503 has low power consumption to ensure longer battery life. It has
two flexible on-chip DC-DC converters using 1xAA or 1xAAA battery as power supply. And a
Low Drop Regulator is also embedded to replace one of the DC-DC generating VDD when
Battery is not present. The built-in Sigma-Delta (Σ-Δ) DAC includes a headphone driver to
directly drive low impedance headphone(s). The ADC includes inputs for both Microphone
and Analog Audio In to support voice and FM radio recording. Thus, it provides a true
‘ALL-IN-ONE’ solution that is ideally suitable for highly optimized digital multimedia players.
Features
¾ Instruction set of MCU compatible with Z80
¾ Internal SRAM access time<7ns, MROM access time<16ns
¾ Accurate Clock Management Unit, supplies 24MHz OSC
¾ Energy saving Power Management Unit, supports 1xAA, 1xAAA
¾ 2-channel DMA, 1-channel Counter/Timer Controller and Interrupt Controller
¾ Support USB 2.0 high speed, acting as mass storage device
¾ Support up to 4(pcs)*64M-4G bytes Nand type SLC/MLC Flash
¾ Built-in Key Scan Circuit and GPIOs
¾ Built-in Stereo Sigma-Delta DAC and ADC
Digital voice recording at ultra low 4.4 or 8Kbps with Actions Speech Algorithm
¾ Headphone driver output 2x11mW @16ohm
¾ Support FM Radio input and 32 levels volume control
¾ Support extended low frequency crystal to generalize RTC
¾ 0.18um 1P5M CMOS process and packaged at LQFP-80(10*10mm)
Copyright © Actions Semiconductor Co., Ltd. 2006. All rights reserved.
Ver 1.3
Page 6
2007-1-22

6 Page









ACU7503 pdf, datenblatt
3.2.1 Internal RAM
ACU7503PRODUCT DATASHEET
There are three independent banks of SRAM called ZRAM1 (16KB-64B), ZRAM2
(3KB+3KB) and ZRAM3 (3KB+3KB) that can be accessed by MCU and DMA only. The
internal SRAM memory mapping is as follows.
0000H
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Internal RAMSpace
(MCU.IA15=0)
16KB
16KB
IPMH IPMM IPML IDMH IDMM IDML ZRAM2 ZRAM3
16KB 16KB 16KB 16KB 16KB 16KB (3+3)KB (3+3)KB
7FFFH
3.2.2 Internal ROM
Of the 50KB on-chip ROM, 12KB is boot up BROM that has USB upgrade firmware built in.
3.2.3 External RAM/ROM Access
The External RAM/ROM Controller is able to support up to 6 pieces of 32M*8bit
SRAM/ROM. There are up to 6 chip select signals (CE1- to CE6-) for selecting 6 pieces of
SRAM/ROM. At any time only one chip select signal can be controlled by the bit [5:3] of
EMHIGHP register. There are three extended memory control registers, EMLOWP, EMHIGHP
and EMPIORD.
Note: There is no CE6- pin at all. One of the GPIOs would be used as CE6-. When
accessing the memory space of CE6-, The GPIO should be pulled down before reading or
writing to this memory space.
3.3 DSP Core
24-bit Harvard architecture DSP with DSU built in. Works with a memory word length of
24 bits. ACU7503 has 16K*3 bytes program memory (PM) and 16K*3 bytes data memory
(DM). Memory-Mapped register includes DAC interface. Both DSP and MCU can access the
Host Interface Port (HIP) registers with reading or writing operations and information can be
communicated between the DSP and MCU through it.
Copyright © Actions Semiconductor Co., Ltd. 2006. All rights reserved.
Ver 1.3
Page 12
2007-1-22

12 Page





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