描述

The AS3527 is an ultra low-power microcontroller based on the ARM9 32-bit processor with fully integrated high performance audio features and system power management features.

Using advanced 0.13µm process technology and a large on chip RAM leads to outstanding low power consumption of as low as 52mW for a complete flash-player during a typical audio SW playback.

AS3527 is based on the ARM922TDMI processor, with 8K byte instruction, 8K byte data cache memories and embedded 320K Byte SRAM with performance from 20 ~ 266MHz.

The AS3527 SOC (system-on-chip) features dedicated high speed interfaces for ATA IDE, USB2.0 HS-OTG and SDRAM ensuring maximum performance for download, upload, and playback.

Furthermore interfaces for NAND flashes, MMC/SD cards and Memory Stick ensure most flexible system design possibilities. Hardware support for parallel interfaces lower the CPU load serving complex and/or color user interfaces.

Additional serial high-speed data and control interfaces guarantee the connection to other peripherals and or processors in the system.

Two independently programmable PLLs generate the required frequencies for audio playback/recording, for the processor core and for the USB interface at the same time. An additional external clock input eliminates the use of external crystals when used in multi-processor systems.

It has a variety of audio inputs and outputs to directly connect microphones, and auxiliary signal sources via a 10-channel mixer to a headset 16Ω /32Ω or auxiliary audio peripherals. Selectable mixer bypasses lower the power consumption for simple playback operations and enlarger the system design flexibility.

Further the device offers advanced power management functions. All necessary ICs and peripherals in a Digital Audio Player with flash or hard-disk memory are supplied by the AS3527. The different regulated supply voltages are fully programmable. The power management block generates 11 different supply voltages out of a single supply. CPU, NAND flash, SRAM, memory cards, hard disk, LCD, LCD backlight, USB-HOST and USB OTG can be powered.

The AS3527 has an independent 32kHz real time clock (RTC) on chip, which allows a complete power down of the system CPU and peripherals and contains a charger for Li-Ion batteries.

The single supply voltage may vary from 3.0V to 5.5V.

AS3527 is available in a small footprint of 13x13mm, 224 pin CTBGA RoHS-compliant package.

You can do evaluation of AS3527 Analog Integrated Microcontroller IC with the AS3527 Demoboard.

主要特征

1. Digital Core

• Embedded 32-Bit RISC Controller
  •  ARM922TDMI RISC CPU
  •  2.5Mbit on-chip RAM
  •  1Mbit on chip ROM
  •  Clock speed max 250MHz (200MIPS)
  •  Standard JTAG interface
• USB 2.0 HS & OTG Interface
  •  Up to 480Mbit/s transfer speed
  •  USB 2.0 HS/FS physical inlcuding OTG support
  •  USB 2.0 HS/FS digital core including OTG host
  •  Dedicated dual port buffer RAM
  •  DMA bus master functionality
• IDE Host Controller
  •  Supporting Ultra ATA 33/66/100/133 modes
  •  Programmable IO and Multi-word DMA capability
  •  Dedicated dual port buffer RAM
  •  DMA bus master functionality
• External Memory Controller
  •  Dynamic memory interface
  •  Asynchronous static memory
  •  DMA bus master functionality
• DMA Controller
  •  Single Master DMA controller
  •  2 DMA channels possible at the same time
  •  16 DMA requests supported
• Interrupt Controller
  •  Support for 32 standard interrupts
  •  Support for 16 vectored IRQ interrupts
• Audio Subsystem Interface
  •  Dedicated 2 wire serial control master
  •  I²S input and output with dual port buffer RAM
• Nand Flash Interface
  •  8 and 16 bit flash support
  •  3, 4 & 5 byte address support
  •  Hardware ECC
• MMC/SD Interface
  •  MMC/SD Card host for multiple card support
  •  4 data line support for SD cards
• MS / MS Pro Interface
  •  Dedicated dual port buffer RAM
• Display Interface
  •  Serial and parallel controller supported
  •  On-chip hardware acceleration
• Synchronous Serial Interface
  •  Master and slave operation
  •  8 and 16 bit support
  •  Several protocol standards supported
• I²S Interface
  •  Input multiplexed with audio subsystem
  •  Selectable SPDIF input/output conversion
  •  Dedicated dual port buffer RAM
• 2 Wire Serial Control Interface
  •  Master and slave operation
  •  Standard and fast mode support
• General Purpose IO Interface
  •  4x 8-bit ports

2. Audio

• Multi-bit Sigma Delta Converters
  •  DAC: 18bit with 94dB SNR (‘A’ weighted)
  •  ADC: 20bit with 90dB SNR (‘A’ weighted)
  •  Sampling Frequency: 8-48kHz
  •  32 gain steps @ 1.5dB and MUTE
• 2 Line Inputs
  •  Stereo, 2x mono or mono differential inputs
  •  32 gain steps @ 1.5dB and MUTE
• 2 Microphone Inputs
  •  Differential inputs
  •  3 gain pre-sets (28/34/40 dB) and OFF with AGC
  •  32 gain steps @ 1.5dB and MUTE
  •  Microphone detection with about 50μA
  •  Supply for electret microphone max 1mA
  •  Voice activation and remote control by switch
• 2 Line Outputs
  •  Max 1Vp @ 10kΩ in single ended stereo mode
   
  •  >32Ω in mono differential mode to drive earpieces
  •  Mixer bypass
  •  32 gain steps @ 1.5dB and MUTE
• Stereo Headphone Audio Amplifier
  •  2x 60mW @ 16Ω driver capacity
  •  32 gain steps @ 1.5dB and MUTE
  •  Click- and pop-less start-up and power down
  •  Headphone and over-current detection
  •  Phantom ground eliminates large capacitors
  •  Mixer bypass
• 10 Channel Audio Mixer
  •  Mixes Line inputs, Mic inputs and DAC output
  •  Separate selectable source for right and left channel
  •  Possibility to select AGC to prevent clipping

3. Power Management

• Li-Ion Battery Charger
  •  Automatic 50mA trickle charging
  •  Prog. constant current charging (50-400mA)
  •  Prog. constant voltage charging (3.9-4.25V)
• Voltage Generation
  •  Step down for harddisk (0.65V-3.4V, 500mA)
  •  Step down for CPUcore (1.05V-1.2V, 250mA)
  •  Step down for peripheral (0.65V-3.4V, 250mA)
  •  Charge pump for USB OTG (5V, 10mA)
  •  Step up for USB HOST/OTG (5V, 500mA)
  •  LDO for digital supply (2.9V, 200mA)
  •  LDO for analog supply (2.9V, 200mA)
  •  LDO for peripherals (1.2V-3.5V, 200mA)
  •  LDO for USB transceiver (3.26V, 200mA)
  •  LDO for RTC (1.0V-2.5V, 2mA)
• 25V Back-light step-up converter
  •  For driving up to 6 white LEDs in series to achieve a uniform illumination
  •  Current programmable up to 40mA (1.25mA steps)
  •  Dimming with selectable timing

4. System

• RTC
  •  Ultra low power 32kHz oscillator
  •  32bit RTC second counter, 96 days auto wake-up
  •  Selectable alarm (seconds or minutes)
  •  Trim able oscillator
  •  128bit free SRAM for random settings
  •  32kHz clock output to peripherals
• Oscillator
  •  Low power 12-24MHz Oscillator
  •  Generating main system clock
  •  Supervisor
  •  Automatic battery monitoring with interrupt generation and selectable warning level
  •  Automatic temperature supervision with interrupt generation and selectable warning and shutdown levels
   
  •  Power rail monitoring
• General Purpose ADC
  •  10-bit resolution
  •  21 inputs analog multiplexer
• UID
  •  Unique Identification Number in OTP ROM for DRM support
• General
  •  Reset pin, watchdog, power good pin
  •  PWM output
  •  Hibernation modes
  •  5sec and 10sec emergency shut-down
  •  Wide battery supply range 3V-5.5V
  •  MP3 playback with 52mW
• Packages:
  •  AS3527-A: CTBGA224 13x13mm, 0.8mm pitch
  •  (in preparation: CTBGA160 11x11, 0.8mm pitch)

产品应用

• Portable Patient Monitor(Medical devices)
• Enhanced Voice recorders
• Wearables
• Personal Museum Guide
• GPS Data Loggers
• Broadband Internet Gadgets
• Point-of-sales(POS) equipment
• USB Transport Controller
• WiFi-to-USB Adapter
• Portable Navigation Device
• Bluetooth Headsets / Car Kits / Photo viewers
• Portable Digital Media Player
• PDA / Smartphone

Block diagram for AS3527 Analog Integrated Microcontroller IC