APCPCWM_4828539:WP_0000001WP_0000001
1
H27(U_S)4G8_6F2D
4 Gbit (512M x 8 bit) NAND Flash
5th ID Data
Description
I/O7
I/O6 I/O5 I/O4
I/O3 I/O2
I/O1
I/O0
1
2
4
8
0
0
1
1
0
1
0
1
Plane Number
64Mb
128Mb
256Mb
512Mb
1Gb
2Gb
4Gb
8Gb
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Plane Size
(w/o redundant Area)
Reserved
0
0
0
Table 18: Legacy Read ID 5th byte description
3.20 Read ONFI Signature
To retrieve the ONFI signature, the command 90h together with an address of 20h shall be entered (i.e. it is not valid to
enter an address of 00h and read 36 bytes to get the ONFI signature). The ONFI signature is the ASCII encoding of 'ONFI'
where 'O' = 4Fh, 'N' = 4Eh, 'F' = 46h, and 'I' = 49h. Reading beyond four bytes yields indeterminate values. Figure 28
shows the operation sequence
3.21 Read Parameter Page
The Read Parameter Page function retrieves the data structure that describes the chip's organization, features, timings
and other behavioral parameters. Figure 37 defines the Read Parameter Page behavior.
This data structure enables the host processor to automatically recognize the Nand Flash configuration of a device. The
whole data structure is repeated at leat three times.
The Random Data Read command can be issued during execution of the read parameter page to read specific portions
of the parameter page.
The Read Status command may be used to check the status of read parameter page during execution. After completion
of the Read Status command, 00h is issued by the host on the command line to continue with the data output flow for
the Read Parameter Page command.
Read Status Enhanced shall not be used during execution of the Read Parameter Page command.
3.22 Parameter Page Data Structure Definition
Table21 defines the parameter page data structure. For parameters that span multiple bytes, the least significant byte
of the parameter corresponds to the first byte.
Values are reported in the parameter page in units of bytes when referring to items related to the size of data access (as
in an 8-bit data access device). For example, the chip will return how many data bytes are in a page. For a device that
supports 16-bit data access, the host is required to convert byte values to word values for its use. Unused fields should
be cleared to 0h.
For more detailed information about Parameter Page Data bits, refer to ONFI Specification 1.0 section 5.4.1
Rev 1.4 / OCT. 2010
26
B34416/177.179.157.84/2010-10-08 10:08
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HYNIX [ HYNIX SEMICONDUCTOR ]
