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參數(shù)資料
| 型號： | AM28F256-90JCB |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | PROM |
| 英文描述： | 256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
| 中文描述： | 32K X 8 FLASH 12V PROM, 90 ns, PQCC32 |
| 封裝： | PLASTIC, LCC-32 |
| 文件頁數(shù)： | 20/35頁 |
| 文件大?。?/td> | 493K |
| 代理商： | AM28F256-90JCB |
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20
Am28F256
Auto Select Command
AMD’s Flash memories are designed for use in applica-
tions where the local CPU alters memory contents. Ac-
cordingly, manufacturer and device codes must be
accessible while the device resides in the target sys-
tem. PROM programmers typically access the signa-
ture codes by raising A9 to a high voltage. However,
multiplexing high voltage onto address lines is not a
generally desired system design practice.
The device contains an Auto Select operation to sup-
plement traditional PROM programming methodology.
The operation is initiated by writing 80h or 90h into the
command register. Following this command, a read
cycle address 0000h retrieves the manufacturer code
of 01h. A read cycle from address 0001h returns the
device code. To terminate the operation, it is necessary
to write another valid command, such as Reset (FFh),
into the register.
相關PDF資料 |
PDF描述 |
|---|---|
| AM28F256-90JE | 256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
| AM28F256-90JI | Octal bus transceivers with open collector outputs 20-PDIP 0 to 70 |
| AM28F256-90JIB | 256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
| AM28F256-90PC | 256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
| AM28F256-90PCB | 256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AM28F256-90JE | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
| AM28F256-90JEB | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
| AM28F256-90JI | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
| AM28F256-90JIB | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory |
| AM28F256-90LC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 Flash EEPROM |
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