M29F400FB55M3F2 Micron Technology Inc, M29F400FB55M3F2 Datasheet - Page 56

• Manufacturer Part Number: M29F400FB55M3F2
• Manufacturer: Micron Technology Inc

Specifications of M29F400FB55M3F2

• Cell Type: NOR
• Density: 4Mb
• Access Time (max): 55ns
• Interface Type: Parallel
• Boot Type: Bottom
• Address Bus: 19/18Bit
• Operating Supply Voltage (typ): 5V
• Operating Temp Range: -40C to 125C
• Package Type: SO W
• Program/erase Volt (typ): 4.5 to 5.5V
• Sync/async: Asynchronous
• Operating Temperature Classification: Automotive
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Word Size: 8/16Bit
• Number Of Words: 512K/256K
• Supply Current: 20mA
• Mounting: Surface Mount
• Pin Count: 44
• Lead Free Status / Rohs Status: Compliant

Appendix B
56/67
10h
1Bh
27h
40h
61h
10h
11h
12h
13h
14h
15h
16h
x16
x16
Address
Address
20h
36h
4Eh
80h
C2h
20h
22h
24h
26h
28h
2Ah
2Ch
x8
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. Addresses used to retrieve the data are shown in the
following tables:
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 Numonyx. Issue a Read command to return to Read mode.
Table 31.
Query data are always presented on the lowest order data outputs.
Table 32.
x8
CFI Query Identification String
System Interface Information
Device Geometry Definition
Primary Algorithm-specific Extended
Query table
Security Code Area
Table 31.: Query Structure
Table 32.: CFI Query Identification
Table 33.: CFI Query System Interface
Table 34.: Device Geometry
Table 35.: Primary Algorithm-Specific Extended Query Table
Table 36.: Security Code Area
0051h
0052h
0059h
0002h
0000h
0040h
0000h
Data
Sub-section Name
Common Flash Interface (CFI)
CFI Query Identification String
Query Structure Overview
Table 36.: Security Code
Query Unique ASCII String "QRY"
Primary Algorithm Command Set and Control Interface ID code 16 bit
ID code defining a specific algorithm
Address for Primary Algorithm extended Query table (see
Overview,
Definition,
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
String,
Area). This area can be accessed only in Read
Description
Information,
Description
Table
34.)
"Q"
"R"
"Y"
AMD
Compatible
P = 40h
Value