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参数资料
| 型号： | PUMA68F32006M-90E |
| 元件分类： | PROM |
| 英文描述： | 1M X 32 FLASH 5V PROM MODULE, 90 ns, PQMA68 |
| 封装： | PLASTIC, LCC-68 |
| 文件页数： | 9/23页 |
| 文件大小： | 181K |
| 代理商： | PUMA68F32006M-90E |
17
PUMA 68F32006/A-90/12/15
Issue 4.2 : December 1999
Sector Erase
Sector erase is a six bus cycle operation. There are two "unlock"write cycles. These are followed by writing
the "Set-up" command. Two more "unlock" write cycles are then followed by the sector erase command. The
sector address (any address location within the desired sector) is latched on the falling edge of WE, while the
command (30H) is latched on the rising edge of WE. A time-out of 50us from the rising edge of the last sector
erase command will initiate the sector erase command(s).
Sector erase doesn't require the user to program the device prior to erase. The device automatically programs
all memory locations in the sector(s) to be erased prior to electrical erase. When erasing a sector or sectors
the remaining unselected sectors are not affected. The system is not required to provide any controls or
timings during these operations.
The automatic sector erase begins after the 50us time-out from the rising edge of the WE pulse for the last
sector erase command pulse and terminates when the data on D7 is "1" ( see Written Operation Status
Section) at which time the device returns to read mode. Data polling must be preformed at an address within
any of the sectors being erased.
Erase Suspend
Erase suspend allows the user to interrupt a sector erase operation and then perform data reads or programs
to a sector not being erased.
This command is only applicable during the sector erase operation which includes the time-out period for
sector erase. Writing the erase suspend command during the sector erase time-out results in immediate
termination of the time-out period & suspension of the erase operation. Writing the erase resume command
resumes the erase operation.
When the erase operation has been suspended, the device defaults to the erase-suspend-read mode. After
entering the erase-suspend-read mode, the user can program the device by writing the appropriate command
sequence for Byte program. The end of the erase-suspend program operation is detected by data polling, or
by the toggle bit. Note that DQ7 must be read from the byte program address.
To resume the sector erase operation, the resume command (30H) should be written. Any further writes of the
resume command at this point will be ignored.
Multiple sectors may be erased sequentially by writing the six bus cycle operations as desribed above. This
sequence is followed with writes of the sector erase command to addresses in other sectors desired to be
sequentially erased. A time-out of 50us from the rising edge of the WE pulse for the last sector erase com-
mand will initiate the sector erase. If another sector erase command is wriiten within the 50us time-out window
the timer is reset. Any command other than sector erase within the time-out window will reset the device to the
read mode, ignoring the previous command string (refer to Write Operation Status section for Sector Erase
Timer operation). Loading the sector erase buffer may be done in any sequence and with any number of
sectors (0 to 7).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PUMA68F32006X-12 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EEPROM |
| PUMA68F32006X-15 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EEPROM |
| PUMA68F32006X-90 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EEPROM |
| PUMA68F32006XI-12 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EEPROM |
| PUMA68F32006XI-15 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EEPROM |
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