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EDI7F492MC डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - (EDI7F292MC / EDI7F492MC) Boot-Only Sector Erase Flash Memory - White Electronic Designs

भाग संख्या EDI7F492MC
समारोह (EDI7F292MC / EDI7F492MC) Boot-Only Sector Erase Flash Memory
मैन्युफैक्चरर्स White Electronic Designs 
लोगो White Electronic Designs लोगो 
पूर्व दर्शन
1 Page
		
<?=EDI7F492MC?> डेटा पत्रक पीडीएफ

EDI7F492MC pdf
White Electronic Designs
EDI7F292MC
EDI7F492MC
PRELIMINARY
executing the erase command sequence. This will invoke
the Embedded Erase Algorithm which is an internal
algorithm that automatically preprograms the array if it
is not already programmed before executing the erase
operation. During erase, the device automatically times the
erase pulse widths and verifies proper cell margin.
This device also features a sector erase architecture.
This allows for sectors of memory to be erased and
reprogrammed without affecting the data contents of
other sectors. A sector is typically erased and verified
within one second. The EDI7F292/492MC is erased when
shipped .
The EDI7F292/492MC device also features hardware
sector group protection. This feature will disable both
program and erase operations in any combination of
eight sector groups of memory. A sector group consists
of four adjacent sectors grouped in the following pattern:
sectors 0–3, 4–7, 8–11, 12–15, 16–19, 20–23, 24–27,
and 28–31.
WEDC has implemented an Erase Suspend feature that
enables the user to put erase on hold for any period of
time to read data from, or program data to, a sector that
was not being erased. Thus, true background erase can
be achieved.
The device features single 5.0 Volt power supply operation
for both read and write functions. Internally generated and
regulated voltages are provided for the program and erase
operations. A low VCC detector automatically inhibits write
operations during power transitions. The end of program
or erase is detected by the RY/BY# pin, Data# polling
of DQ7, or by the Toggle Bit I (DQ6). Once the end of a
program or erase cycle has been completed, the device
automatically resets to the read mode.
The EDI7F292/492MC also has a hardware RESET# pin.
When this pin is driven low, execution of any Embedded
Program Algorithm or Embedded Erase Algorithm will be
terminated. The internal state machine will then be reset
into the read mode. The RESET# pin may be tied to the
system reset circuitry. Therefore, if a system reset occurs
during the Embedded Program Algorithm or Embedded
Erase Algorithm, the device will be automatically
reset to the read mode. This will enable the system’s
microprocessor to read the boot-up firmware from the
Flash memory.
The EDI7F292/492MC memory electrically erases all
bits within a sector simultaneously via Fowler-Nordheim
tunneling. The bytes are programmed one byte at a time
using the EPROM programming mechanism of hot electron
injection.
FLEXIBLE SECTOR-ERASE
Thirty two 64 Kbyte sectors
Eight sector groups each of which consists of 4
adjacent sectors in the following pattern: sectors 0-
3, 4-7, 8-11, 12-15, 16-19, 20-23, 24-27, and 28-31.
Individual-sector or multiple-sector erase capability
Sector group protection is user-definable
SA31
SA30
SA29
SA28
64 Kbyte
64 Kbyte
64 Kbyte
64 Kbyte
32 Sectors Total
SA3 64 Kbyte
SA2 64 Kbyte
SA1 64 Kbyte
SA0 64 Kbyte
1FFFFFh
1EFFFFh
1DFFFFh
1CFFFFh
1BFFFFh
1AFFFFh
19FFFFh
18FFFFh
17FFFFh
16FFFFh
15FFFFh
14FFFFh
13FFFFh
12FFFFh
11FFFFh
10FFFFh
1FFFFFh
1EFFFFh
1DFFFFh
1CFFFFh
1BFFFFh
1AFFFFh
09FFFFh
08FFFFh
07FFFFh
06FFFFh
05FFFFh
04FFFFh
03FFFFh
02FFFFh
01FFFFh
00FFFFh
000000h
Sector
Group
7
Sector
Group
0
January 2006
Rev. 1
2 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com

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भाग संख्याविवरणविनिर्माण
EDI7F492MC(EDI7F292MC / EDI7F492MC) Boot-Only Sector Erase Flash MemoryWhite Electronic Designs
White Electronic Designs


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