OTi
Description
Ours Technology Inc.
OTi-6828
FLASH DISK CONTROLLER
The flash disk controller (OTi_6828) is a disk controller used to make a linear flash device array
look likes a normal disk, hiding the flash related problems with erasing.
The OTi_6828 is a controller with USB interface. The USB interface is for full speed operation
(12Mb/s). It conforms to USB Specification, Version 1.1. The USB transceiver is embedded in this
controller. With stable slew-rate control, the controller reduces EMI.
The OTi_6828 has a Phase Lock Loop (PLL) embedded. The PLL provides all clocks needed in
this controller. It needs an externally provided clock operating in 14.318MHz.
The OTi_6828 has integrated the regulator for 5V input and 3.3V output. It also supports voltage
detector for power on reset.
The OTi_6828 can control up to 4 pieces of NAND flash memory. The flash capacity can be 32M
bits up to 1G bits. And these chips can be any combination. It has been optimized to support Toshiba
and Samsung flash memory designs. It also supports Samsung’s K9F and K9W Series flash. The
controller has write-protected ability to prevent writing data to flash. The controller has a led control
pin. It has three operation modes: suspend (off), active (fast) and idle (twinkle) mode. For read/write
operation, the controller can achieve 1,000kB/920kB throughput. Comprehensive application with
Windows OS is available.
This controller can operate in Win XP, Win2000, Windows Me, and Mac OS without any driver
installation.
The OTi_6828 is available in cost-saving 32-pin TSOP package.
Features
• Flash controller with full-speed USB interface
• Integrated 5V/3.3V regulator, USB bus power supply capability
• USB Specification Compliance
— Conforms to USB Specification, Version 1.1
• Integrated USB transceiver
— Dynamic feedback control
— Stable slew rate, independent of external loading
• RISC micro-controller
— High-performance RISC architecture
— Single cycle instruction execution
• 14.318 MHz external clock
• Integrated PLL
• Integrated Power On Reset (POR)
• Support up to 4 pieces of NAND Flash memory with write-protected ability
• Support Toshiba and Samsung’s K9K series flash
• Support Samsung’s K9F and K9W series flash
• Support wear-leveling
• Higher reliability: ECC on the fly
• Automatic bad block management
• Supported OS:
Win XP, Win2000, Windows ME, Linux 2.4 above, and MAC OS 9.0 & higher
Win 98/Win98SE driver available
Mac 8.6 mass storage driver available from Apple
Multiple LUN Windows driver is available
• LED indication:
Programmable through Mass Production Toolset
• Configurable Vendor ID/Product ID (VID/PID)
• Performance: Read (1,000kBytes/s) , Write (920kBytes/s) Max.
• Small form factor - standard 32-pin TSOP package
OTi
Ours Technology Inc.
OTi-6828
FLASH DISK CONTROLLER
Pin Description
Pin Name
GPIO
LED_OUT
FL_R_B
FL_WE
FL_RE
FL_IO_7
FL_IO_6
FL_IO_5
FL_IO_4
FL_IO_3
FL_IO_2
FL_IO_1
FL_IO_0
FL_CLE
FL_ALE
SEL_RESET
RESET_B
FL_WP
XTAL2
XTAL1
VDD
VSS
VDD5V
VDD5V
VSS
VDD
DPLS_IO
DMNS_IO
FL_CE0
Attribute
I/O
O
I
O
O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I
I
I/O
O
I
P
P
P
P
P
P
I/O
I/O
O
Reserved I/O
LED indication(open drain)
Flash Ready_Busy
Flash Write Enable
Flash Read Enable
Flash data bus – bit 7
Flash data bus – bit 6
Flash data bus – bit 5
Flash data bus – bit 4
Flash data bus – bit 3
Flash data bus – bit 2
Flash data bus – bit 1
Flash data bus – bit 0
Flash Command Latch Enable
Flash Address Latch Enable
Selection of Internal Reset or External Reset
Reset, active low
Flash Write Protect
Crystal output
Crystal input (14.318MHz)
3.3V Output
GND
5V Input
5V Input
GND
3.3V Output
USB D+
USB D-
Flash Chip Enable – Chip 0
Description
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
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