BU94501AMUV Datasheet, PDF (10/73 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card + iPod

BU9450xAxxx series
Datasheet
●Description of each block’s movement
-part1
1. USB host interface
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Builds in the USB Full speed (12Mbps) HOST control function.
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Supports the USB mass storage class.
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Supports changeover of LUN (Logical Unit Number) and possible that Test Unit Ready of other LUN is confirmed
during the playback.
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Converts the protocol from I²C to USB (HID) or vice versa during communications with the master
microcomputer.*
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Builds in isochronous transmission functions up to 192byte/Frame. *
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Builds in the interrupt IN transfer function. *
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Doesn’t support external HUB.
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Doesn’t support MTP.
*These functions are available for a device having two or more configurations.
2. SD card interface
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Supports the SPI mode.
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Supports SDHC memory cards.
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Supports MMC, mini-SD and micro-SD cards.
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Does not support CPRM.
3. I²C command interface (Slave I/F)
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Communicates with the master microcomputer using the I²C interface format.
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Operates as I²C slave I/F.
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Supports the standard mode (100kbps) and the fast mode (400kbps).
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Supports 7-bit addresses.
4. Audio output
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Supports audio line outputs from built-in 1bit-DAC.
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Builds in the digital soft mute function. *
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Supports digital audio outputs of the I²S format, the EIAJ format and those and the digital audio interface
(SPDIF).
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Builds in sound effects including POPS, JAZZ, ROCK, CLASSIC, R&B and Bass Boost. *
*This is available for audio line outputs only.
5. Sample rate converter
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Converts all support sample rates to 44.1 kHz based on the polyphase calculation.
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Selection of sample rate converter ON / OFF is possible by the command configuration.
* Supports only digital audio outputs of the I²S and EIAJ format and
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When sample rate converter is used in off, enter the clock of 24.576 MHz synchronizing with the clock of 16.9344
MHz ( enter XIN_PLL terminal ) to the CLK24MI terminal.
6. System controller
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Control all operations including interface control to the master microcomputer, USB device access, SD card
access, FAT analysis, sort function, decoding, encoding and audio output.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
10/69
TSZ02201-0V2V0E600070-1-2
2012.12.10 Rev.003