BU94605AKV Datasheet, PDF (9/84 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card +CD-ROM+MP3 Record

BU94605AKV BU94607AKV BU94702AKV BU94705AKV
Datasheet
●Description of each block’s movement
-part1
1. USB host interface
⋅ Builds in the USB Full speed (12Mbps) HOST control function.
⋅ Supports the USB mass storage class.
⋅ Converts the protocol from I²C to USB (HID) or vice versa during communications with the master microcomputer. *1
⋅ Builds in isochronous transmission functions up to 192byte/Frame. *1
⋅ Builds in the interrupt IN transfer function. *1
⋅ Doesn’t support external HUB.
*1 These functions are available for a device having two or more configurations.
BU94607AKV and BU94705AKV only.
2. SD card interface
⋅ Supports the SPI mode.
⋅ Supports SDHC memory cards.
⋅ Supports MMC, mini-SD and micro-SD cards.
⋅ Does not support CPRM.
3. CD input interface
⋅ Supports digital audio 3-line inputs (I2S, EIAJ format). *2
⋅ Supports CD-ROM 3-line inputs (I2S, EIAJ format).
⋅ Supports the data connection function by comparison with data at the last time. *2
⋅ Encodes the input data in the MP3 or WAV format and writes encoded data to a USB or SD memory. *2
⋅ Builds in the CD-ROM decoder function.
*2 BU94702AKV and BU94705AKV only.
Real time recording can be realized only by the recording memory (USB memory /SD memory card) that a writing
response speed *) **) is fast. Even the recording memory that a response speed is early when it is written in in a
short time, a response sometimes becomes slow by long writing. Use the recording memory that it was fully verified
by the product specifications.
*) It is a response speed toward an order for mass storage writing in the USB "Full Speed" standard connection of the
USB memory. It doesn't influence a response speed in "High Speed" or "Ultra High Speed" and an average
transfer speed.
**) It is a response speed toward an order for mass storage writing in the SPI mode connection of the SD memory
card. It doesn't influence a response speed in the SD mode connection and a Class speed.
4. I²C command interface (Slave I/F)
⋅ Communicates with the master microcomputer using the I²C interface format.
⋅ Operates as I²C slave I/F.
⋅ Supports the standard mode (100kbps) and the fast mode (400kbps).
⋅ Supports 7-bit addresses.
⋅ Can select four types of slave addresses.
5. Serial interface (Slave I/F)
⋅ Supports the SPI mode.
⋅ Operates as SPI slave I/F.
⋅ Supports 8-, 16 and 32 bit/transfer data. An input clock supports to Max. =2MHz.
⋅ Supports to download data such as images within the memory to the microcomputer.
6. Audio output
⋅ Supports audio line outputs from built-in 1bit-DAC.
⋅ Builds in the digital soft mute function. *
⋅ Supports digital audio outputs of the I2S format, the EIAJ format and those and the digital audio interface (SPDIF).
⋅ Builds in sound effects including POPS, JAZZ, and ROCK, CLASSIC, R&B and BassBoost. *
*This is available for audio line outputs only.
7. Sample rate converter
⋅ Converts all support sample rates to 44.1 kHz based on the polyphase calculation.
8. System controller
⋅ 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
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TSZ02201-0V2V0E600090-1-2
2012.12.10 Rev.002