SN11086

2003/2/28 ver 0.1

1

SN11086

Second Generation USB1.1 Flash Memory Controller

Version 0.1

2003/2/28

1 General Description

SN11086 is a high-performance integrated circuit to access the NAND type Flash memory

via the USB 1.1 bus. It provides a flexible and cost efficient single chip solution for external

storage applications such as USB Disk (Flash Disk). With the capability to be pin-to-pin

compatible to SN11085, the current user of SN11085 can easily upgrade to SN11086 with no

engineering effort needed at all. With all the features inherited from SN11085 like the low

6MHz system clock to reduce the EMI, the embedded translation table to eliminate the cost

of external memory, the Sonix proprietary randomization algorithm to extend the lifetime of

flash memory and ensure the product robustness, and the real time ECC correction function,

the SN 11086 adds several other unique features to reduce the cost of the end product and

meet the customer’s requirements.

To enrich the product line of the OEM manufacture, with the ability to support 8 pieces of

flash memories and the new types of 2G bits flashes, SN11086 can be used to build up a

storage device up to 2 Giga bytes. To reduce the total cost of the end product, SN11086

incorporates a power MOS inside to meet the current requirement (500 uA) in USB suspend

state. The usage of EEPROM can also now be eliminated by the capability to program the

customized vendor/product ID/string in the flash itself. Therefore, the total cost is reduced by

upgrade from SN11085 to SN11086.

For fulfilling different customers’ needs, SN11086 now provides several ways to build

different end products. The first one is to provide different security functions. The OEM

manufacturers can program one of the two ways in manufacturing via software. The flashing

ways of LED can also be selected by software now. With these flexibilities, the

manufacturers can easily build different products by using exactly the same components.