W29GL128CH9C-TR Datasheet, PDF (18/67 Pages) Winbond – 128M-BIT 3.0-VOLT PARALLEL FLASH MEMORY WITH PAGE MODE

W29GL128C
7.2.15 Buffer Write Abort
Write Buffer Programming Sequence will ABORT, if the following condition takes place:
 The word count minus one loaded is bigger than the page buffer size (32) during, “Number of
Locations to Program.”
 Sector Address written is not the same as the one specified during the Write-Buffer-Load
instruction.
 If the Address/Data set is not inside the Write Buffer Page range which was set during cycle
5’s first initial write-buffer-page select address/data set.
 No “Program Confirm Instruction” after the assigned number of “data load” cycles.
After Write Buffer Abort, the status register will be DQ1=1, DQ7 = DATA# (last address loaded),
DQ6=toggle, DQ5=0. This status represents a Write Buffer Programming Operation was ABORTED. A
Write-to-Buffer-Abort Reset instruction sequence has to be written to reset the device back to the read
array mode.
DQ1 is the bit for Buffer Write Abort. When DQ1=1, the device will abort from buffer write operation
and go back to read status register shown in the following table:
Status
DQ7 DQ6
Buffer Write Busy
DQ7# Toggle
Buffer Write Abort
DQ7# Toggle
Buffer Write Exceeded Time Limit
DQ7# Toggle
Table 7-8
Polling Buffer Write Abort Flag
DQ5
0
0
1
DQ3
N/A
N/A
N/A
DQ2
N/A
N/A
N/A
DQ1
0
1
0
RY/#BY
0
0
0
7.2.16 Accelerated Programming Operation
The device will enter the Accelerated Programming mode by applying high voltage (VHH) to the
#WP/ACC pin. Accelerated Programming mode allows the system to skip the normal unlock
sequences instruction and program byte/word locations directly. The current drawn from the
#WP/ACC pin during accelerated programming is no more than IACC1. Important Note: Do not exceed
10 accelerated programs per sector. (#WP/ACC should not be held at VHH for any other function
except for programming or damage to the device may occur.)
7.2.17 Automatic Select Bus Operation
There are basically two methods to access Automatic Selection Operations; Automatic Select
Instructions through software commands and High Voltage applied to A9. See Automatic Select
Instruction Sequence later on in this section for details of equivalent instruction operations that do not
require the use of VHH. The following five bus operations require A9 to be raised to VHH.
7.2.17.1 Sector Lock Status Verification
To verify the protected state of any sector using bus operations, execute a Read Operation with VHH
applied to A9, the sector address present on address pins A[22:12], address pins A6, A3, A2, and A0
held Low, and address pins A1 held High. If DQ0 is Low, the sector is considered not protected, and if
DQ0 is High, the sector is considered to be protected.
7.2.17.2 Read Silicon Manufacturer ID Code
Winbond’s 29GL family of Parallel Flash memories feature an Industry Standard compatible
Manufacturer ID code of 01h. To verify the Silicon Manufacturer ID code, execute a Read Operation
with VHH applied to the A9 pin and address pins A6, A3, A2, A1 and A0 are held Low. The ID code
can then be read on data bits DQ[7:0].
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