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参数资料
| 型号： | E28F400BX-B60 |
| 厂商： | INTEL CORP |
| 元件分类： | PROM |
| 英文描述： | ACTUATOR, SWITCH, ROUND, MOMENTARY; Approval Bodies:BEAB, VDE, UL, CSA; Diameter, external:29mm; IP rating:65; Operations, mechanical No. of:1000000; Temp, op. max:85(degree C); Temp, op. min:-20(degree C) RoHS Compliant: Yes |
| 中文描述： | 256K X 16 FLASH 12V PROM, 60 ns, PDSO56 |
| 封装： | 20 X 14 MM, TSOP-56 |
| 文件页数： | 11/50页 |
| 文件大小： | 449K |
| 代理商： | E28F400BX-B60 |
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28F400BX-TB 28F004BX-TB
44 Write Operations
Commands are written to the CUI using standard mi-
croprocessor write timings The CUI serves as the
interface between the microprocessor and the inter-
nal chip operation The CUI can decipher Read Ar-
ray Read Intelligent Identifier Read Status Register
Clear Status Register Erase and Program com-
mands In the event of a read command the CUI
simply points the read path at either the array the
Intelligent Identifier or the status register depending
on the specific read command given For a program
or erase cycle the CUI informs the write state ma-
chine that a write or erase has been requested Dur-
ing a program cycle the Write State Machine will
control the program sequences and the CUI will only
respond to status reads Durlng an erase cycle the
CUI will respond to status reads and erase suspend
After the Write State Machine has completed its
task it will allow the CUI to respond to its full com-
mand set The CUI will stay in the current command
state until the microprocessor issues another com-
mand
The CUI will successfully initiate an erase or write
operation only when VPP is within its voltage range
Depending upon the application the system design-
er may choose to make the VPP power supply
switchable available only when memory updates
are desired The system designer can also choose
to ‘‘hard-wire’’ VPP to 12V The 4-Mbit boot block
flash family is designed to accommodateeither de-
sign practice It is recommended that RP
be tied to
logical Reset for data protection during unstable
CPU reset function as described in the ‘‘Product
Family Overview’’ section
441 BOOT BLOCK WRITE OPERATIONS
In the case of Boot Block modifications (write and
erase) RP
is set to VHH e 12V typically in addi-
tion to VPP at high voltage
However if RP
is not at VHH when a program or
erase operation of the boot block is attempted the
corresponding status register bit (Bit 4 for Program
and Bit 5 for Erase refer to Table 5 for Status Regis-
ter Definitions) is set to indicate the failure to com-
plete the operation
442 COMMAND USER INTERFACE (CUI)
The Command User Interface (CUI) serves as the
interface to the microprocessor The CUI points the
readwrite path to the appropriate circuit block as
described in the previous section After the WSM
has completed its task it will set the WSM Status bit
to a ‘‘1’’ which will also allow the CUI to respond to
its full command set Note that after the WSM has
returned control to the CUI the CUI will remain in its
current state
4421 Command Set
Command
Device Mode
Codes
00
InvalidReserved
10
Alternate Program Setup
20
Erase Setup
40
Program Setup
50
Clear Status Register
70
Read Status Register
90
Intelligent Identifier
B0
Erase Suspend
D0
Erase ResumeErase Confirm
FF
Read Array
4422 Command Function Descriptions
Device operations are selected by writing specific
commands into the CUI Table 4 defines the 4-Mbit
boot block flash family commands
19
相关PDF资料 |
PDF描述 |
|---|---|
| E28F400BX-B80 | 4-MBIT (256K X 16, 512K X 8) BOOT BLOCK FLASH MEMORY FAMILY |
| E28F400BX-T120 | 4-MBIT (256K X 16, 512K X 8) BOOT BLOCK FLASH MEMORY FAMILY |
| E28F004BX-T120 | OSC 5V SMT PLAS 14X9 CMOS |
| E2SAA10-30.000MTR | QUARTZ CRYSTAL RESONATOR, 30 MHz |
| E2SDA18-13.560M | QUARTZ CRYSTAL RESONATOR, 13.56 MHz |
相关代理商/技术参数 |
参数描述 |
|---|---|
| E28F400BX-B80 | 制造商:INTEL 制造商全称:Intel Corporation 功能描述:4-MBIT (256K X 16, 512K X 8) BOOT BLOCK FLASH MEMORY FAMILY |
| E28F400BX-T120 | 制造商:INTEL 制造商全称:Intel Corporation 功能描述:4-MBIT (256K X 16, 512K X 8) BOOT BLOCK FLASH MEMORY FAMILY |
| E28F400BX-T60 | 制造商:INTEL 制造商全称:Intel Corporation 功能描述:4-MBIT (256K X 16, 512K X 8) BOOT BLOCK FLASH MEMORY FAMILY |
| E28F400BX-T80 | 制造商:INTEL 制造商全称:Intel Corporation 功能描述:4-MBIT (256K X 16, 512K X 8) BOOT BLOCK FLASH MEMORY FAMILY |
| E28F400CVB60 | 制造商:INTEL 制造商全称:Intel Corporation 功能描述:4-MBIT (256K X 16, 512K X 8)SmartVoltage BOOT BLOCK FLASH MEMORY FAMILY |
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