M28W640FSU70ZA6 Micron Technology Inc, M28W640FSU70ZA6 Datasheet - Page 58

• Manufacturer Part Number: M28W640FSU70ZA6
• Manufacturer: Micron Technology Inc

Specifications of M28W640FSU70ZA6

• Cell Type: NOR
• Density: 64Mb
• Access Time (max): 70ns
• Interface Type: Parallel
• Address Bus: 22b
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TBGA
• Sync/async: Asynchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 16b
• Number Of Words: 4M
• Supply Current: 18mA
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / Rohs Status: Not Compliant

Common Flash Interface (CFI)
Appendix B
58/76
The Common Flash Interface is a JEDEC approved, standardized data structure that can be
read from the Flash memory device. It allows a system software to query the device to
determine various electrical and timing parameters, density information and functions
supported by the memory. The system can interface easily with the device, enabling the
software to upgrade itself when necessary.
When the CFI Query Command (RCFI) is issued the device enters CFI Query mode and the
data structure is read from the memory.
Table 33
The CFI data structure also contains a security area where a 64 bit unique security number
is written (see
by the final user. It is impossible to change the security number after it has been written by
ST. Issue a Read command to return to Read mode.
Table 28.
1. Query data are always presented on the lowest order data outputs.
Offset
1Bh
00h
10h
27h
P
A
show the addresses used to retrieve the data.
Reserved
CFI Query Identification String
System Interface Information
Device Geometry Definition
Primary Algorithm-specific Extended
Query table
Alternate Algorithm-specific Extended
Query table
Common Flash Interface (CFI)
Query structure overview
Table 33: Security code
Sub-section Name
area). This area can be accessed only in Read mode
Table
(1)
28,
Reserved for algorithm-specific information
Command set ID and algorithm data offset
Device timing & voltage information
Flash device layout
Additional information specific to the Primary
Algorithm (optional)
Additional information specific to the Alternate
Algorithm (optional)
Table
29,
Table
M28WxxxFS, M28WxxxFSU
Description
30,
Table
31,
Table 32
and