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CHAPTER 23 512K / 1024K BIT FLASH MEMORY
23.5.4
Sector Deletion Timer Flag (DQ3)
After starting the sector deletion command, the sector deletion timer flag indicates
whether it is "during the sector deletion waiting period". Table 23.5-6 shows the sector
deletion timer flag status transition.
■
When the Sector Deletion Operation is Executed.
When the read/access is executed after starting the sector deletion command, the flash memory outputs "0"
if this flag indicates "during the sector deletion waiting period" irrespective of the address specified by the
address signal from the sector having issued the command. However, the flash memory outputs "1" if this
flag exceeds the defined sector deletion waiting period.
When the deletion algorithm is being executed by the data polling function or toggle bit function, the
internally-controlled deletion operation is started if this flag is "1". The succeeding sector deletion code to
be written and other commands except the sector deletion temporary stop command are ignored until
deletion is terminated.
If this flag is "0", the flash memory accepts the additional sector deletion code to be written. To verify this
event, it is recommended that this flag status be checked before writing the succeeding sector deletion code.
If this flag is "1" when the second time the status is checked, the additional sector deletion code may not be
accepted.
■
When the Sector Deletion Operation is Executed.
When the read/access is executed while executing the sector deletion temporary stop, the flash memory
outputs "1" if the specified address belongs to the sector being deleted. However, unless the specified
address belongs to the sector being deleted, the flash memory outputs the data of bit3 (DATA:3) of the
specified read address.
Sector Deletion Timer Flag Status Transition
Table 23.5-6 Sector Deletion Timer Flag Status Transition
Operating
status
Write operation
--> Completion
Chip/sector
deletion
-->Completion
Sector deletion
wait-->Start
DQ3
DATA:3
Sector deletion
temporary stop
-->Restart
(Sector being
deleted)
During the sector
deletion temporary
stop (Sector not
being deleted)
Sector deletion
-->Deletion
temporary stop
(Sector being
deleted)
Operating status
Write operation
Chip/sector deletion operation
DQ3
- Status transition during abnormal operation
- Status transition during normal operation
0-->DATA:3
1
0-->1
0
1
1-->0
0-->1
Summary of Contents for MB90460 Series
Page 1: ...The following document contains information on Cypress products ...
Page 3: ......
Page 5: ......
Page 9: ...iv ...
Page 41: ...22 CHAPTER 1 OVERVIEW ...
Page 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Page 83: ...64 CHAPTER 3 CPU ...
Page 95: ...76 CHAPTER 4 RESET ...
Page 107: ...88 CHAPTER 5 CLOCK ...
Page 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Page 175: ...156 CHAPTER 7 INTERRUPT ...
Page 181: ...162 CHAPTER 8 MODE SETTING ...
Page 223: ...204 CHAPTER 9 I O PORT ...
Page 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Page 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Page 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Page 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Page 485: ...466 CHAPTER 16 PWC Timer ...
Page 531: ...512 CHAPTER 17 UART ...
Page 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Page 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Page 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Page 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Page 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Page 715: ...696 APPENDIX ...
Page 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Page 739: ......