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| 型号： | EN29LV640T-90BIP |
| 厂商： | Eon Silicon Solution Inc. |
| 英文描述： | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| 中文描述： | 64兆位（8米× 8位/分x 16位）闪存引导扇区闪存，CMOS 3.0伏，只 |
| 文件页数： | 8/53页 |
| 文件大小： | 495K |
| 代理商： | EN29LV640T-90BIP |
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This Data Sheet may be revised by subsequent versions
2004 Eon Silicon Solution, Inc., www.essi.com.tw
or modifications due to changes in technical specifications.
16
EN29LV640T/B
Rev. B, Issue Date: 2007/05/16
sector protection, the sector address must appear on the appropriate highest order address bits. Refer to
the corresponding Sector Address Tables. The “Command Definitions” table shows the remaining
address bits that are don’t-care. When all necessary bits have been set as required, the programming
equipment may then read the corresponding identifier code on DQ15–DQ0.
To access the autoselect codes in-system; the host system can issue the autoselect command via the
command register, as shown in the Command Definitions table. This method does not require V
B
IDB. See
“Command Definitions” for details on using the autoselect mode.
Writing Command Sequences
To write a command or command sequence to program data to the device or erase data, the system has
to drive WE# and CE# to V
B
IL, and OE# to VBIHB.
For program operations, the BYTE# pin determines whether the device accepts program data in bytes or
words. An erase operation can erase one sector or the whole chip.
The system can also read the autoselect codes by entering the autoselect mode, which need the
autoselect command sequence to be written. Please refer to the “Command Definitions” for all the
available commands.
RESET#: Hardware Reset
When RESET# is driven low for t
B
RPB, all output pins are tristates. All commands written in the internal state
machine are reset to reading array data.
Please refer to timing diagram for RESET# pin in “AC Characteristics”.
Sector/Sector Group Protection & Chip Unprotection
The hardware sector group protection feature disables both program and erase operations in any sector. The
hardware chip unprotection feature re-enables both program and erase operations in previously protected
sectors. A sector group implies three or four adjacent sectors that would be protected at the same time. Please
see the following tables which show the organization of sector groups.
There are two methods to enable this hardware protection circuitry. The first one requires only that the
RESET# pin be at VID and then standard microprocessor timings can be used to enable or disable this
feature. See Flowchart 7a and 7b for the algorithm and Figure. 12 for the timings.
When doing Chip Unprotect, all the unprotected sector groups must be protected prior to any unprotect
write cycle.
The second method is for programming equipment. This method requires VID to be applied to both OE#
and A9 pins and non-standard microprocessor timings are used. This method is described in a separate
document named EN29LV640T/B Supplement, which can be obtained by contacting a representative of Eon
Silicon Solution, Inc.
U
相关PDF资料 |
PDF描述 |
|---|---|
| EN29LV640T-90BI | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| EN29LV640T-90BP | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| EN29LV640T-90B | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| EN29LV640T-90TIP | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| EN29LV640T-90TI | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EN29LV800AB-70TC | 制造商:Eon Silicon Solution Inc 功能描述: |
| EN29LV800BB-70TCP | 制造商:EON SILICON SOLUTION INC 功能描述:EN29LV800B Series, 8 Mbit 70 NS 48 TSOP 3 V Bottom Boot Sector NOR Flash |
| EN29LV800CT-70TIP | 制造商:EON SILICON SOLUTION INC 功能描述:8mb TSOP 70ns nor flash |
| EN29SL400B-90BIP | 制造商:EON SILICON SOLUTION INC 功能描述:EN29SL400 Series, 4 Mbit 90 NS 48 FBGA 1.8 V Bottom Boot Sector NOR Flash |
| EN2-B1H1 | 制造商:NEC 制造商全称:NEC 功能描述:AUTOMOTIVE RELAYS (Twin, Single) Relays |
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