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參數(shù)資料
| 型號： | EN29F002NB |
| 英文描述： | 5V, Half Duplex, 250kbps Slew Rate Limited, ±15kV ESD Protected, 1/8 Unit Load, RS-485/RS-422 Transceiver; Temperature Range: -40°C to 85°C; Package: 8-SOIC |
| 中文描述： | 2兆位（262144 × 8）閃光 |
| 文件頁數(shù)： | 5/32頁 |
| 文件大?。?/td> | 267K |
| 代理商： | EN29F002NB |
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13
EN29F002 / EN29F002N
Rev. C, Issue Date: 2001/07/05
DATA PROTECTION
Power-up Write Inhibit
During power-up, the device automatically resets to READ mode and locks out write cycles. Even
with CE = VIL, WE = VIL and OE = VIH, the device will not accept commands on the rising edge of
WE .
Low VCC Write Inhibit
During VCC power-up or power-down, the EN20F002 locks out write cycles to protect against any
unintentional writes. If VCC < VLKO, the command register is disabled and all internal program or
erase circuits are disabled. Under this condition, the device will reset to the READ mode. Subsequent
writes will be ignored until VCC > VLKO.
Write “Noise” Pulse Protection
Noise pulses less than 5ns on OE , CE or WE will neither initiate a write cycle nor change the
command register.
Logical Inhibit
If CE =VIH or WE=VIH, writing is inhibited. To initiate a write cycle, CE and WE must be a logical
“zero”. If CE , WE , and OE are all logical zero (not recommended usage), it will be considered a
write.
Sector Protection/Unprotection
When the device is shipped, all sectors are unprotected. Each sector can be separately protected
against data changes.
Using hardware protection circuitry enabled at user’s site with external
programming equipment, both program and erase operations may be disabled for any specified
sector or combination of sectors.
Verification of write protection for a specific sector can be achieved with an Auto Select ID read
command at location 02h where the address bits A17 - A13 select the defined sector (see Table 5).
A logical “1” at DQ0 means a protected sector and a logical “0” means an unprotected sector.
The Sector Unprotect disables sector protection in all sectors in one operation to implement code
changes.
All sectors must be placed in protection mode using the protection algorithm mentioned
above before unprotection can be executed.
Additional details on this feature are provided in a supplement, which can be obtained by contacting a
representative of Eon Silicon Devices, Inc.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EN29F002NT | 5V, Half Duplex, 250kbps Slew Rate Limited, ±15kV ESD Protected, 1/8 Unit Load, RS-485/RS-422 Transceiver; Temperature Range: -40°C to 85°C; Package: 8-SOIC |
| EN29F002T | 5V, Half Duplex, 250kbps Slew Rate Limited, ±15kV ESD Protected, 1/8 Unit Load, RS-485/RS-422 Transceiver; Temperature Range: -40°C to 85°C; Package: 8-PDIP |
| EN29F002B | 5V, Half Duplex, 5Mbps, RS-485/RS-422 Transceiver; Temperature Range: -40°C to 85°C; Package: 8-PDIP |
| ENC112D-20A | 2A Standard Buck PWM Regulator; Temperature Range: -40°C to 85°C; Package: 12-DFN |
| ENC121D-20A | STD MOV |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EN29F002NT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2 Megabit (262，144 x 8) FLASH |
| EN29F002T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2 Megabit (262，144 x 8) FLASH |
| EN29F002T-45J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2 Megabit (256K x 8-bit) Flash Memory |
| EN29F002T-45JI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2 Megabit (256K x 8-bit) Flash Memory |
| EN29F002T-45P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2 Megabit (256K x 8-bit) Flash Memory |
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