33
implementation of an ECC is mandatory. The chip supports CE# don't care function. This
function allows the direct download of the code from the NAND Flash memory device by a
microcontroller, since the CE# transitions do not stop the read operation. In addition, device
supports ONFI 1.0 specification.
The copy back function allows the optimization of defective blocks management: when a
page program operation fails the data can be directly programmed in another page inside the
same array section without the time consuming serial
data insertion phase. Copy back operation automatically executes embedded error detection
operation: 1 bit error out of every 528-byte (x8) or 1 bit error out of every 264-word (x16) can
be detected. With this feature it is no longer necessary to use an external to detect copy back
operation errors. Multiplane copy back is also supported, both with traditional and ONFI 1.0
protocols. Data read out after copy back read (both for single and multiplane cases) is
allowed. In addition, Cache program and multi cache program operations improve the
programing throughput by programing data using the cache register.
The devices provide two innovative features: page re-program and multiplane page re
program. The page re-program allows to re-program one page. Normally, this operation is
performed after a previously failed page program operation.Similarly, the multiplane page re-
program allows to re-program two pages in parallel, one per each plane. The first page must
be in the first plane while the second page must be in the second plane; the multiplane page
re-program operation is performed after a previously failed multiplane page program
operation. The page re-program and multiplane page re-program guarantee imporve
performance, since data insertion can be omitted during re-program operations, and save ram
buffer at the host in the case of program failure. The devices, available in the TSOP48
(12X20mm) package, support the ONFI1.0 specfication and come with four sequrity features:
- OTP (one time programmable) area, which is a restricted access area where sensitive
data/code can be stored permantely.
- Serial number (unique identifier), which allows the devices to be uniquely indentified.
- Read ID2 extention
These security features are subject to an NDA (non-disclosure agreement) and are,
therefore, no described in the datasheet. For more details about them, contact your nearest
Hynix sales office.
To Next Page
Loading...