501
CHAPTER 23 2M/3M BIT FLASH MEMORY
23.6.5 Suspending Sector Erasure for the Flash Memory
This section describes the procedure for issuing the sector erase suspend command
to suspend a sector erase operation for the flash memory. During erase suspension,
data can be read from any sector that is not subject to erasure.
■
Suspending sector erasure for the flash memory
To suspend sector erasure for the flash memory, send the sector erase suspend command in
the command sequence table (see Table 23.4-1) from CPU to the internal flash memory.
The sector erase suspend command is used to suspend the erasure during a sector erase
operation, allowing data from a sector that is not being erased to be read. In this state, only
reading is allowed; writing is prohibited. This command is enabled only in sector erase mode,
including within the erase wait time, and ignored in chip erase mode or during write operations.
This operation is executed by writing the erase suspend code (B0
H
). To do so, specify an
arbitrary address in flash memory. During the erase suspend state, repeatedly issued erase
suspend commands are ignored.
If a sector erase suspend command is entered during the sector erase wait time, sector erase
wait ends immediately, the erase operation is interrupted, and the operational state changes to
erase stop.
If a erase suspend command is entered during a sector erase operation after the sector erase
wait time, the system enters the erase suspend mode after 20
μ
s have elapsed or earlier.
Please execute the sector erase stop command after sector erase command or sector erase
resume command issuing and 20
μ
s or more.
Summary of Contents for MB90480 Series
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Page 10: ...vi ...
Page 128: ...106 CHAPTER 4 RESET ...
Page 174: ...152 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Page 198: ...176 CHAPTER 7 MODE SETTING ...
Page 220: ...198 CHAPTER 9 TIMEBASE TIMER ...
Page 238: ...216 CHAPTER 11 WATCH TIMER ...
Page 280: ...258 CHAPTER 12 16 BIT INPUT OUTPUT TIMER ...
Page 406: ...384 CHAPTER 17 8 10 BIT A D CONVERTER ...
Page 478: ...456 CHAPTER 20 CHIP SELECTION FACILITY ...
Page 494: ...472 CHAPTER 21 ADDRESS MATCH DETECTION FUNCTION ...
Page 498: ...476 CHAPTER 22 ROM MIRROR FUNCTION SELECTION MODULE ...
Page 526: ...504 CHAPTER 23 2M 3M BIT FLASH MEMORY ...
Page 536: ...514 CHAPTER 24 EXAMPLES OF MB90F481B MB90F482B MB90F488B MB90F489B SERIAL PROGRAMMING ...
Page 570: ...548 CHAPTER 25 PWC TIMER ONLY MB90485 SERIES ...
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