TC58FVB321FT-10 Toshiba, TC58FVB321FT-10 Datasheet - Page 12

• Manufacturer Part Number: TC58FVB321FT-10
• Manufacturer: Toshiba

Specifications of TC58FVB321FT-10

• Cell Type: NOR
• Density: 32Mb
• Access Time (max): 100ns
• Interface Type: Parallel
• Boot Type: Bottom
• Address Bus: 22/21Bit
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TSOP-I
• Sync/async: Asynchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8/16Bit
• Number Of Words: 4M/2M
• Supply Current: 30mA
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / Rohs Status: Not Compliant

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 except the boot blocks which have been protected by the Boot Block Protect
operation. The device returns to its previous state when V
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.
Boot Block Protection
protection. Neither V
boot blocks are BA0 and BA1. Inputting V
protect these blocks, the ordinary Block Protection Mode must be used.
WP
Block Protection is a function for disabling writing and erasing specific blocks. Block protection can be carried
The TC58FVT321/B321 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.
Boot block protection temporarily protects certain boot blocks using a method different from ordinary block
/ACC
= 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.
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
. The target blocks are the two pairs of boot blocks. The top boot blocks are BA69 and BA70; the bottom
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
ID
nor a command sequence is required. Protection is performed simply by inputting V
IH
on
ID
PPLH
WP
IH
) to the device (see Block protection 1) or by supplying a high
/ACC
and A0 = A6 = V
until this write is completed; however, no intervention is
ID
to the RESET pin. Now Write and Erase operations
releases the mode. From now on, if it is necessary to
TC58FVT321/B321FT/XB-70,-10
ID
PPLH
IL
is removed from the RESET pin. That is,
and A1 = V
, the device will start to write to the block
IL
are input. Now the device writes to the
ID
IH
. If the block is protected, 01H is
input from RESET exits this
2002-08-06 12/48
ID
, A1 = V
ID
to the A9 pin,
IH
ID
and CE
from A9
IL
IL
on
on