
595
CHAPTER 23 512K / 1024K BIT FLASH MEMORY
23.5.1
Data Polling Flag (DQ7)
The data polling flag (DQ7) indicates whether the automatic algorithm is being executed
or has been terminated, using the data polling function. Table 23.5-3 shows the data
polling flag status transition.
■
When the Write Operation is Executed.
When the read/access is executed during automatic write algorithm execution, the flash memory outputs the
reverse data of bit7 in the last-written data, irrespective of the specified address. When the read/access is
executed at the end of the automatic write algorithm, the flash memory outputs the data of bit7 in the
specified read address. When the read/access is executed at the end of the automatic write algorithm, the
flash memory outputs the data of bit7 in the specified read address.
■
When the Chip/Sector Deletion Operation is Executed.
When the read/access is executed during the chip/sector deletion algorithm execution, the flash memory
outputs "0" from the sector being deleted by the sector deletion, or irrespective of the specified address
during the chip deletion. Similarly, the flash memory outputs "1" at the end of chip/sector deletion
algorithm.
■
When the Sector Deletion Temporary Stop is Executed.
When the access/read is executed while executing the sector deletion temporary stop, the flash memory
outputs "1" if the specified address is the sector being deleted. However, the flash memory outputs the data
of bit7 (DATA:7) of the specified read address, if the specified address is not the sector being deleted. By
referencing this together with the toggle bit flag (DQ6), it can be determined whether the current sector is
in the temporary stop state or which sector is being deleted.
Note:
When the automatic algorithm is started, the read/access to the specified address is ignored. As for
the data reading, the end of data polling flag (DQ7) is posted, and then other data bit can be output.
Therefore, the data read operation after the end of the automatic algorithm should be executed next
to the read/access after verifying the end of data polling flag.
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: ......