W29GL256SH9T-TR Datasheet, PDF (18/88 Pages) Winbond – 256M-BIT 3.0-VOLT PARALLEL FLASH MEMORY WITH PAGE MODE

W29GL256S
The Common Flash Interface (CFI) command enables a Memory Map Overlay where a table of
standard information about how the flash memory is organized and operates can be read.
Typically, these two address spaces have used separate commands and had separate overlays and
are non-overlapping, so they actually can be combined in a single overlay. Either of these two
commands can be used to access the combined Autoselect (ID) and CFI overlay.
The CFI-ID address map overlays the Flash Array data of the sector selected by the address used in
the CFI-ID enter command. While the CFI-ID MMO is entered, the content of all other sectors is
undefined. Address map starts at location 0 of the selected sector. Data is considered as undefined
past the maximum defined address of the CFI-ID MMO to the maximum address of the selected
sector.
To enter the Manufacturer ID (Autoselect) and Common Flash Interface (CFI) MMO command modes
see the Instruction Definition Table.
Table 7-2 CFI-ID Address Map Overview
Word Address
(SA) + 0000h to 000Fh
(SA) + 0010h to 0079h
(SA) + 0080h to FFFFh
Description
Device ID (traditional
Autoselect values)
CFI data structure
Undefined
For the complete address map see the Device ID and Common Interface Tables.
Read / Write
Read Only
Read Only
Read Only
7.3 Status Register
The Status Register, Memory Map Overlay (MMO) contains status for Internal Algorithms in a single
volatile word format. When the read command for the Status Register is issued, status at the time of
captured is presented in the register and the MMO is entered. All word locations in the device
address space contain the Status Register information. Status Register exits the MMO mode after the
first read access and returns to the address space map in use when the Status Register read
command was issued.
Publication Release Date: Jul 02, 2014
Revision C
18