參數(shù)資料
型號(hào)： TC58FV321
廠商： Toshiba Corporation
英文描述： TOSHIBA MOS DIGITAL INTEGRATED CIRCUIT SILICON GATE CMOS 32-MBIT (4M X 8 BITS / 2M X 16 BITS) CMOS FLASH MEMORY
中文描述： 東芝馬鞍山數(shù)字集成電路硅柵CMOS 32兆位（4米× 8位/ 2米× 16位）的CMOS閃存
文件頁(yè)數(shù)： 17/48頁(yè)
文件大?。?/td> 560K
代理商： TC58FV321
TC58FVT321/B321FT/XB-70,-10
2002-08-06 17/48
DQ6 (Toggle bit 1)
The device status can be determined by the Toggle Bit function during an Auto-Program or auto-erase
operation. The Toggle bit begins toggling on the rising edge of WE in the last bus cycle. DQ6 alternately
outputs a 0 or a 1 for each OE access while CE
=
V
IL
while the device is busy. When the internal operation
has been completed, toggling stops and valid memory cell data can be read by subsequent reading. If the
operation fails, the DQ6 output toggles.
If an attempt is made to execute an Auto Program operation on a protected block, DQ6 will toggle for around 3
μ
s. It will then stop toggling. If an attempt is made to execute an auto erase operation on a protected block, DQ6
will toggle for around 100
μ
s. It will then stop toggling. After toggling has stopped the device will return to Read
Mode.
DQ5 (internal time-out)
If the internal timer times out during a Program or Erase operation, DQ5 outputs a 1. This indicates that the
operation has not been completed within the allotted time.
Any attempt to program a 1 into a cell containing a 0 will fail (see Auto-Program Mode). In this case DQ5
outputs a 1. Either a hardware reset or a software Reset command is required to return the device to Read Mode.
DQ3 (Block Erase timer)
The Block Erase operation starts 50
μ
s (the Erase Hold Time) after the rising edge of WE in the last
command cycle. DQ3 outputs a 0 for the duration of the Block Erase Hold Time and a 1 when the Block Erase
operation starts. Additional Block Erase commands can only be accepted during the Block Erase Hold Time.
Each Block Erase command input within the hold time resets the timer, allowing additional blocks to be marked
for erasing. DQ3 outputs a 1 if the Program or Erase operation fails.
DQ2 (Toggle bit 2)
DQ2 is used to indicate which blocks have been selected for Auto Block Erase or to indicate whether the device
is in Erase Suspend Mode.
If data is read continuously from the selected block during an Auto Block Erase, the DQ2 output will toggle.
Now 1 will be output from non-selected blocks; thus, the selected block can be ascertained. If data is read
continuously from the block selected for Auto Block Erase while the device is in Erase Suspend Mode, the DQ2
output will toggle. Because the DQ6 output is not toggling, it can be determined that the device is in Erase
Suspend Mode. If data is read from the address to which data is being written during Erase Suspend in
Programming Mode, DQ2 will output a 1.
RY
The TC58FVT321/B321 has a
state) indicates that an Auto-Program or auto-erase operation is in progress. A 1 (Ready state) indicates that the
operation has finished and that the device can now accept a new command.
operation has failed.
BY
/
RY
outputs a 0 after the rising edge of WE in the last command cycle.
During an Auto Block Erase operation, commands other than Erase Suspend are ignored.
during an Erase Suspend operation. The output buffer for the
allowing a wired-OR connection. A pull-up resistor must be inserted between V
DD
and the
BY
/
RY
signal to indicate the device status to the host processor. A 0 (Busy
BY
/
RY
outputs a 0 when an
BY
/
RY
outputs a 1
BY
/
RY
pin is an open-drain type circuit,
RY
BY
/
pin.
BUSY
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