tc58fvt160 TOSHIBA Semiconductor CORPORATION, tc58fvt160 Datasheet - Page 10

• Manufacturer Part Number: tc58fvt160
• Description: 16-mbit 2m ? 8 Bits / 1m ? 16 Bits Cmos Flash Memory
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Erase Suspend / Erase Resume Modes
The Erase Suspend command is allowed during an auto block erase operation but is ignored in all other oreration
modes .
command is input during an Auto Block Erase, the device will enter Erase Suspend Read Mode after t
device status (Erase Suspend Read Mode) can be verified by checking the Hardware Sequence flag. If data is
read consecutively from the block selected for Auto Block Erase, the DQ2 output will toggle and the DQ6 output
will stop toggling and
been selected for the Auto Block Erase. Data is written in the usual manner.
the device returns to the state it was in when the Erase Suspend command was input. If an Erase Suspend
command is input during the Erase Hold Time, the device will return to the state it was in at the start of the
Erase Hold Time. At this time more blocks can be specified for erasing. If an Erase Resume command is input
during an Auto Block Erase, Erase resumes. At this time toggle output of DQ6 resumes and 0 is output on
Block Protection
out in two ways: by supplying a high voltage (V
voltage and a command sequence (see Block protection 2).
(1) Block protection 1
(2) Block protection 2
Temporary Block Unprotection
protected blocks. Unprotection is enabled by applying V
can be performed on all blocks. The device returns to its previous state when V
pin. That is, previously protected blocks will be protected again.
Verify Block Protect
Verification is performed either by inputting the Verify Block Protect command or by applying V
as for ID Read Mode, and setting the block address = A0 = A6 = V
output. If the block is unprotected, 00H is output.
RY
Erase Suspend Mode suspends Auto Block Erase and reads data from or writes data to an unselected block.
In Erase Suspend Mode only a Read, Program or Resume command can be accepted. If an Erase Suspend
Inputting a Write command during an Erase Suspend enables a Write to be performed to a block which has not
To resume the Auto Block Erase, input an Erase Resume command. On receiving an Erase Resume command,
Block Protection is a function for disabling writing and erasing specific blocks. Block protection can be carried
The TC58FVT160/B160A has a temporary block unprotection feature which disables block protection for all
The Verify Block Protect command is used to ascertain whether a block is protected or unprotected.
/
= A0 = A6 = V
protection circuit. Block protection can be verified using the Verify Block Protect command. Inputting V
unprotected. If block protection was unsuccessful, the operation must be repeated. Releasing V
and OE terminates this mode.
first cycle of the command sequence is the Set-up command. In the second cycle, the Block Protect command
is input, in which a block address and A1 = V
block protection circuit. There is a wait of t
necessary during this time. In the third cycle the Verify Block Protect command is input. This command
verifies the write to the block protection circuit. Read is performed in the fourth cycle. If the protection
operation is complete, 01H is output. If a value other than 01H is output, block protection is not complete
and the Block Protect command must be input again. Removing the V
mode.
BY
OE sets the device to Verify Mode. 01H is output if the block is protected and 00H is output if the block is
Specify a device block address and make the following signal settings A9 = OE = V
Applying V
.
ID
IL
to RESET and inputting the Block Protect 2 command also performs block protection. The
. Now when a pulse is input to WE for t
RY
/
BY
will be set to High-Impedance.
ID
PPLH
IH
) to the device (see Block protection 1) or by supplying a high
and A0 = A6 = V
until this write is completed; however, no intervention is
ID
TC58FVT160/B160AFT/AXB-70,-10
to the RESET pin. Now Write and Erase operations
PPLH
IL
and A1 = V
, the device will start to write to the block
IL
are input. Now the device writes to the
ID
IH
ID
. If the block is protected, 01H is
input from RESET exits this
is removed from the RESET
2002-08-06 10/41
ID
, A1 = V
ID
to the A9 pin,
IH
ID
SUSE
and CE
from A9
. The
IL
on