M29W640FT70N6E Micron Technology Inc, M29W640FT70N6E Datasheet - Page 57

• Manufacturer Part Number: M29W640FT70N6E
• Manufacturer: Micron Technology Inc

Specifications of M29W640FT70N6E

• Cell Type: NOR
• Density: 64Mb
• Access Time (max): 70ns
• Interface Type: Parallel
• Boot Type: Top
• Address Bus: 23/22Bit
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TSOP
• Sync/async: Asynchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8/16Bit
• Number Of Words: 8M/4M
• Supply Current: 10mA
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / Rohs Status: Compliant

Appendix B
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 is issued the device enters CFI Query mode and the data
structure is read from the memory. Tables 23, 24, 25, 26, 27, and 28, show the addresses
used to retrieve the data.
The CFI data structure also contains a security area where a 64 bit unique security number
is written (see
mode by the final user. It is impossible to change the security number after it has been
written by ST.
Table 23.
1. Query data are always presented on the lowest order data outputs.
1Bh
x16
10h
27h
40h
61h
Address
4Eh
C2h
20h
36h
80h
x8
Common Flash Interface (CFI)
Query structure overview
Table 28: Security Code
CFI Query Identification String
System Interface Information
Device Geometry Definition
Primary Algorithm-specific Extended
Query table
Security Code Area
Sub-section name
Area). This area can be accessed only in Read
(1)
Command set ID and algorithm data offset
Device timing & voltage information
Flash device layout
Additional information specific to the
Primary Algorithm (optional)
64 bit unique device number
Description
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