29C010PC-1 查看數據表（PDF） - Turbo IC Inc
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29C010PC-1
Turbo IC Inc
29C010PC-1 Datasheet PDF : 8 Pages
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Turbo IC, Inc.
29C010
ADVANCE INFORMATION
SOFTWARE ALGORITHM
C) Software Chip Clear
The 29C010 has an internal register for the software algorithm which en-
ables the memory to provide the user with additional features:
a) Software Data Protect Enable
A sequence of the three dummy data writes to the memory will activate
internal EEPROM fuses during the first page write cycle. These EEPROM
fuses will reject any write attempts of new pages of data, unless the three
dummy data writes are repeated at the beginning of any page writes.
The timing for the dummy data and addresses must be the same as for a
normal program operation. A violation of the three steps program protect
sequence in data or address timing and content will abort the procedure
and reset the device to the starting point condition.
Note: Software data protect enable procedure must be performed as part
of a standard program cycle. If no additional page data is added to the
three dummy data writes, the software data protect enable procedure will
be aborted. The data protect state will be activated at the end of the pro-
gram cycle. 128 bytes of data must be loaded during a Software Data
Protection Enable cycle.
Table 1 shows the required procedure for enabling the software data pro-
tect:
The software algorithm of 29C010 includes a sequence of six step dummy
data writing to perform a chip clear operation. Table 3 shows the six step
write sequence to perform the software chip clear operation:
STEP
1
2
3
4
5
6
TABLE 3
MODE
ADD.A14-A0
Page Write 5555 Hex
Page Write 2AAA Hex
Page Write 5555 Hex
Page Write 5555 Hex
Page Write 2AAA Hex
Page Write 5555 Hex
DATA I/O 7-0
AA Hex
55 Hex
80 Hex
AA Hex
55 Hex
10 Hex
At the end of the six step program sequence shown in Table 3, the
device automatically activates its internal timer to control the chip erase
cycle; typically takes 20 msec. After a software chip clear operation has
been completed, all 1024K bit locations of memory show high level at
read operation mode.
d) Software Autoclear Disable Mode
This software algorithm disables the internal automatic clear before a pro-
gram cycle. Table 4 shows the six steps needed to perform the autoclear
disable mode.
STEP
1
2
3
4-131
TABLE 1
MODE
ADD.A14-A0
Page Write 5555 Hex
Page Write 2AAA Hex
Page Write 5555 Hex
Page Write Address
DATA I/O 7-0
AA Hex
55 Hex
A0 Hex
Sector Data (128 Bytes)
b) Software Data Protect Disable
The software algorithm of 29C010 includes a six step sequence dummy
data programming sequence to disable the software data protect feature
described in a). The six step sequence shown in Table 2 must be per-
formed at the beginning of a program cycle. A violation of the six step
program sequence in data or address timing and content will abort the
procedure and reset the chip to the starting point condition. After a soft-
ware data protect disable cycle including the six step sequence has been
performed, the 29C010 does not require the use of three dummy loads
described in a) for the following program cycle. The device is at the soft-
ware data protect disabled state.
Note: When six step sequence of software data protect disable procedure
is performed, if no additional bytes of data is added after the six-step write
sequence, the software data protect disable procedure will be aborted.
The data protect state will be deactivated at the end of the program period.
128 bytes of data must be loaded during a Software Data Protection dis-
able cycle.
Table 2 shows the required procedure for disabling the software data pro-
tect:
STEP
1
2
3
4
5
6
7-134
TABLE 2
MODE
ADD.A14-A0
Page Write 5555 Hex
Page Write 2AAA Hex
Page Write 5555 Hex
Page Write 5555 Hex
Page Write 2AAA Hex
Page Write 5555 Hex
Page Write Address
DATA I/O 7-0
AA Hex
55 Hex
80 Hex
AA Hex
55 Hex
20 Hex
Sector Data (128 Bytes)
STEP
1
2
3
4
5
6
7-134
TABLE 4
MODE
ADD.A14-A0
Page Write 5555 Hex
Page Write 2AAA Hex
Page Write 5555 Hex
Page Write 5555 Hex
Page Write 2AAA Hex
Page Write 5555 Hex
Page Write Address
DATA I/O 7-0
AA Hex
55 Hex
80 Hex
AA Hex
55 Hex
40 Hex
Sector Data (128 Bytes)
Program operation using the software autoclear disable mode will reduce
programming time to typically 40 µs per byte. The program cycle using
software autoclear disable mode is usually used after a chip clear or a
software chip clear operation. At the end of the six step sequence, the
autoclear before program is disabled and will stay that way unless a power-
down occurs or the software autoclear enable procedure is initiated.
e) Software Autoclear Enable Mode
Automatic page clear before page program can be restored to 29C010
either by Vcc power-down or by software autoclear enable mode. Table 5
shows the six step page procedure needed to enable software autoclear
mode:
STEP
1
2
3
4
5
6
7-134
TABLE 5
MODE
ADD.A14-A0
Page Write 5555 Hex
Page Write 2AAA Hex
Page Write 5555 Hex
Page Write 5555 Hex
Page Write 2AAA Hex
Page Write 5555 Hex
Page Write Address
DATA I/O 7-0
AA Hex
55 Hex
80 Hex
AA Hex
55 Hex
50 Hex
Sector Data (128 Bytes)
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