Notes On Using Dual Operation Flash Memory - Fujitsu 8FX Hardware Manual

CHAPTER 26 DUAL OPERATION FLASH MEMORY
26.9 Notes on Using Dual Operation Flash
Memory
26.9

Notes on Using Dual Operation Flash Memory

This section provides notes on using the dual operation Flash memory.
■ Restriction on Using Toggle Bit Flag (DQ6)
When using the dual-operation Flash memory (The Flash memory write control program is
executed on the Flash memory), the toggle bit flag (DQ6) cannot be used to check the
operating state of the Flash memory during programming or erasing. Therefore, use the data
polling flag (DQ7) to check the internal operating state of the Flash memory after
programming data to the Flash memory or erasing data from the Flash memory as shown in the
examples in Figure 26.5-1 and Figure 26.5-2.
The restriction above does not apply if the Flash memory write control program is executed on
the RAM.
580 FUJITSU SEMICONDUCTOR LIMITED
MB95630H Series
MN702-00009-2v0-E