General Description; Block Diagram - LG LAC-M5600 Service Manual

I
OTI6888 (USB Host Controller)

1) GENERAL DESCRIPTION

OTi-6889 is the USB mini host controller with popular compressed media format bit-stream interface, such
as MP3, WMA. The controller embedded the USB 1.1 host/device function; the function provides the ability
that can be connected to the USB device and PC via USB port. The user may store the MP3/WMA songs in
the USB mass storage device and play them through the OTi-6889 bit-stream interface.
The PC-LINK function is also embedded in the OTi-6889; this function gives the easy way to connect
and play MP3/WMA songs from the PC. The user may connect the PC and OTi-6889 with the PC-LINK
function and control the play/pause, stop, FF, FR and volume up/down at the PC side. OTi-6889 is the high-
ly functional integrated controller; to minimum the external component requirement, the high
performance RISC, regulator, PLL, USB function, UART, I
troller.
2) FEATURES
• The USB host controller conforms to Full-speed (12Mb/s) USB Specification, Version 1.1.
• Built-in SD/MMC card interface which conforms to SD specification V1.1 and MMC specification V4.1
(Only available in LQFP-128 package).
• Supports the USB storage device (Version 1.1 or 2.0) with mass storage class.
• Integrated USB transceiver and Phase Lock Loop (PLL).
• Supports Internal System Programming (ISP) function for external program flash ROM.
• Supports USB audio PC-Link function.
• Integrated RISC micro-controller; high-performance RISC architecture with single cycle per instruction.
• I 2 C, I 2 S, general purpose serial interface and GPIOs for application customization.
• 12MHz and 18.432MHz external crystal for USB application and PC-LINK function.
• 3.3 V power operation.
• 128k Bytes embedded program ROM.
• Supports File System, includes FAT12, FAT16 and FAT32.
• Small form factor - standard 80-pin and 128-pin LQFP package.

3) BLOCK DIAGRAM

12 M_XTAL
NOR Flash
PLL
IS P
RIS C
Int ernal RAM
D+
USB 1 .1 PHY
D-
C and GPIO were high-density built in the con-
2
Memory Buff er
Bit-strea m
UHC
UDC
SD/ MMC Card
- 2-20 -
Inte rface
PC-LINK
XTAL
GPIO s
UART
II C
I/F