MB84VD23481FJ-70 Datasheet, PDF (8/55 Pages) SPANSION – 64 M (×16) FLASH MEMORY & 32 M (×16) Mobile FCRAM

MB84VD23481FJ-70
Bank
Splits
1
2
3
4
Volume
8 Mbit
24 Mbit
24 Mbit
8 Mbit
Bank 1
FlexBank^TM Architecture
Combination
Volume
Bank A
56 Mbit
Bank B
40 Mbit
Bank C
40 Mbit
Bank D
56 Mbit
Bank 2
Combination
Remainder (Bank B, C, D)
Remainder (Bank A, C, D)
Remainder (Bank A, B, D)
Remainder (Bank A, B, C)
Bank
Splits
1
2
3
4
Volume
8 Mbit
16 Mbit
24 Mbit
32 Mbit
Example of Virtual Banks Combination
Bank 1
Bank 2
Combination
Sector Size
Volume Combination
Sector Size
Bank A
8 × 8 Kbyte/4 Kword
+
56 Mbit
15 × 64 Kbyte/32 Kword
Bank B
+
Bank C
+
Bank D
8 × 8 Kbyte/4 Kword
+
111 × 64 Kbyte/32 Kword
Bank A
+
Bank D
16 × 8 Kbyte/4 Kword
+
48 Mbit
30 × 64 Kbyte/32 Kword
Bank B
+
Bank C
96 × 64 Kbyte/32 Kword
Bank B
48 × 64 Kbyte/32 Kword 40 Mbit
Bank A
+
Bank C
+
Bank D
16 × 8 Kbyte/4 Kword
+
78 × 64 Kbyte/32 Kword
Bank A
+
Bank B
8 × 8 Kbyte/4 Kword
+
32 Mbit
63 × 64 Kbyte/32 Kword
Bank C
+
Bank D
8 × 8 Kbyte/4 Kword
+
63 × 64 Kbyte/32 Kword
Note : When multiple sector erase over several banks is operated, the system cannot read out of the bank to which
a sector being erased belongs. For example, suppose that erasing is taking place at both Bank A and Bank B,
neither Bank A nor Bank B is read out (they would output the sequence flag once they were selected.)
Meanwhile the system would get to read from either Bank C or Bank D.
Case
1
2
3
4
5
6
7
Simultaneous Operation
Bank 1 Status
Read mode
Read mode
Read mode
Read mode
Autoselect mode
Program mode
Erase mode *
Bank 2 Status
Read mode
Autoselect mode
Program mode
Erase mode *
Read mode
Read mode
Read mode
* : By writing erase suspend command on the bank address of sector being erased, the erase operation gets
suspended so that it enables reading from or programming the remaining sectors.
Note: Bank 1 and Bank 2 are divided for the sake of convenience at Simultaneous Operation. Actually, the Bank
consists of 4 banks, Bank A, Bank B, Bank C and Bank D. Bank Address (BA) meant to specify each of the
Banks.
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