EN29F800 Datasheet, PDF (16/38 Pages) List of Unclassifed Manufacturers – 8 Megabit (1024K x 8-bit / 512K x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 5.0 Volt-only

EN29F800
Table 6. Status Register Bits
DQ
Name
Logic Level
Definition
Erase Complete or
‘1’
erase Sector in Erase
suspend
7
DATA
POLLING
‘0’
DQ7
Erase On-Going
Program Complete or
data of non-erase Sector
during Erase Suspend
DQ7
Program On-Going
‘-1-0-1-0-1-0-1-’ Erase or Program On-going
6
TOGGLE
BIT
DQ6
Read during Erase Suspend
‘-1-1-1-1-1-1-1-‘
Erase Complete
5
ERROR BIT
‘1’
Program or Erase Error
‘0’
Program or Erase On-going
ERASE
3
TIME BIT
‘1’
Erase operation start
‘0’
Erase timeout period on-going
Chip Erase, Erase or Erase
suspend on currently
addressed
Sector. (When DQ5=1, Erase
2
TOGGLE
BIT
‘-1-0-1-0-1-0-1-’
Error due to currently
addressed Sector. Program
during Erase Suspend on-
going at current address
DQ2
Erase Suspend read on
non Erase Suspend Sector
Notes:
DQ7 DATA Polling: indicates the P/E C status check during Program or Erase, and on completion before checking bits
DQ5 for Program or Erase Success.
DQ6 Toggle Bit: remains at constant level when P/E operations are complete or erase suspend is acknowledged.
Successive reads output complementary data on DQ6 while programming or Erase operation are on-going.
DQ5 Error Bit: set to “1” if failure in programming or erase
DQ3 Sector Erase Command Timeout Bit: Operation has started. Only possible command is Erase suspend (ES).
DQ2 Toggle Bit: indicates the Erase status and allows identification of the erased Sector.
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Rev. E, Issue Date: 2001/07/05
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