name:         MT28F400B1
function:     Boot Block Flash Memory
package:      48 Pin TSOP Type I  (FB-2),48
manufacturer: Micron Technology, Inc.
added-by:     Keith E. Barrett
comment:      256K x 16, 512K x 8

    +--()--+
A15 | 1  48| A16
A14 | 2  47| BYTE#
A13 | 3  46| Vss
A12 | 4  45| DQ15/A-1
A11 | 5  44| DQ7
A10 | 6  43| DQ14
 A9 | 7  42| DQ6
 A8 | 8  41| DQ13
 NC | 9  40| DQ5
 NC |10  39| DQ12
WE# |11  38| DQ4
RP# |12  37| Vcc
Vpp |13  36| DQ11
WP# |14  35| DQ3
 NC |15  34| DQ10
 NC |16  33| DQ2
A17 |17  32| DQ9
 A7 |18  31| DQ1
 A6 |19  30| DQ8
 A5 |20  29| DQ0
 A4 |21  28| OE#
 A3 |22  27| Vss
 A2 |23  26| CE#
 A1 |24  25| A0
    +------+

This information was added by a third party and may be incorrect.

This pinout came from the Chipdir:
http://www.chipdir.org/