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參數(shù)資料
| 型號： | PA28F002BC-T80 |
| 廠商： | INTEL CORP |
| 元件分類： | PROM |
| 英文描述： | 28F002BC 2-MBIT (256K X 8) BOOT BLOCK FLASH MEMORY |
| 中文描述： | 256K X 8 FLASH 12V PROM, 80 ns, PDSO44 |
| 封裝： | 0.525 X 1.110 INCH, PLASTIC, SOP-44 |
| 文件頁數(shù)： | 15/37頁 |
| 文件大小： | 455K |
| 代理商： | PA28F002BC-T80 |
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E
28F002BC 2-MBIT BOOT BLOCK FLASH MEMORY
15
PRELIMINARY
Table 4. Command Bus Definitions
First Bus Cycle
Second Bus Cycle
Command
Notes
Oper
Addr
Data
Oper
Addr
Data
Read Array
Write
X
FFH
Intelligent Identifier
1,2
Write
X
90H
Read
IA
IID
Read Status Register
Write
X
70H
Read
X
SRD
Clear Status Register
Write
X
50H
Program Setup
Write
PA
40H
Write
PA
PD
Block Erase/Confirm
Write
BA
20H
Write
BA
D0H
Erase Suspend/Resume
Write
X
B0H
Write
X
D0H
ADDRESS
BA = Block Address
IA = Identifier Address
PA = Program Address
X = Don’t Care
DATA
SRD = Status Register Data
IID = Intelligent Identifier Data
PD = Program Data
NOTES:
1.
Bus operations are defined in Table 2.
2.
Following the Intelligent Identifier command, two read operations access manufacturer and device codes respectively.
3.3.1.1
Command Function Description
Device operations are selected by writing specific
commands into the CUI. Tables 3 and 4 define the
available commands. Status Register (SR) bits are
defined in Table 5.
Invalid/Reserved
These are unassigned commands and should not
be used. Intel reserves the right to redefine these
codes for future functions.
Read Array (FFH)
This single write cycle command points the read
path at the array. If the host CPU performs a
CE#/OE#-controlled Read immediately following a
two-write sequence (i.e., a Program or Erase
command) that started the WSM, then the device
will output status register contents. Writing two
Read Array (FFH) commands to the CUI aborts the
current operation and resets to read array mode.
Executing Read Array after the Erase Setup
command (instead of giving Erase Confirm) causes
the status register Erase and Program Status bits to
be set. This indicates that an erase operation was
initiated but not successfully confirmed (an Erase
Confirm at this point would be ignored by the CUI).
A subsequent Read Array command will point the
data path at the array (see Appendix B).
Intelligent Identifier (90H)
After this command is executed, the CUI points the
output path to the intelligent identifier circuits. Only
intelligent identifier values at addresses 0 and 1 can
be read (only address A
0
is used in this mode; all
other address inputs are ignored).
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