參數(shù)資料
型號(hào)： A29L040AX
廠商： AMIC Technology Corporation
英文描述： Replaced by PT78NR109,PT78ST109 : 9Vout 1.5A Wide Input Positive Step-Down ISR 3-SIP MODULE -40 to 85
中文描述： 為512k × 8位CMOS 3.0伏只，統(tǒng)一部門(mén)快閃記憶體
文件頁(yè)數(shù)： 7/30頁(yè)
文件大?。?/td> 405K
代理商： A29L040AX
A29L040A Series
PRELIMINARY (March, 2005, Version 0.0)
6
AMIC Technology, Corp.
Autoselect Mode
The autoselect mode provides manufacturer and device
identification, and sector protection verification, through
identifier codes output on I/O
7
- I/O
0
. This mode is primarily
intended for programming equipment to automatically match
a device to be programmed with its corresponding
programming algorithm. However, the autoselect codes can
also be accessed in-system through the command register.
When using programming equipment, the autoselect mode
requires V
ID
(11.5V to 12.5 V) on address pinA9. Address
pins A6, A1, and AO must be as shown in Autoselect Codes
(High Voltage Method) table. In addition, when verifying
sector protection, the sector address must appear on the
Table 3. A29L040A Autoselect Codes (High Voltage Method)
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 I/O
7
- I/O
0
.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
ID
. See "Command Definitions" for details on using
the autoselect mode.
Description
A18 - A16 A15 - A10
A9
A8 - A7
A6
A5 - A2
A1
AO
Identifier Code on
I/O
7
- I/O
0
Manufacturer ID: AMIC
X
X
V
ID
X
V
IL
X
V
IL
V
IL
37h
Device ID: A29L040A
X
X
V
ID
X
V
IL
X
V
IL
V
IH
92h
01h (protected)
Sector Protection
Verification
Sector
Address
X
V
ID
X
V
IL
X
V
IH
V
IL
00h (unprotected)
Continuation ID
X
X
V
ID
X
V
IL
X
V
IH
V
IH
7Fh
Sector Protection/Unprotection
The hardware sector protection feature disables both
program and erase operations in any sector. The hardware
sector unprotection feature re-enables both program and
erase operations in previously protected sectors.
Sector protection/unprotection must be implemented using
programming equipment. The procedure requires a high
voltage (V
ID
) on address pin A9 and the control pins.
The device is shipped with all sectors unprotected.
It is possible to determine whether a sector is protected or
unprotected. See "Autoselect Mode" for details.
Hardware Data Protection
The requirement of command unlocking sequence for
programming or erasing provides data protection against
inadvertent writes (refer to the Command Definitions table).
In addition, the following hardware data protection measures
prevent accidental erasure or programming, which might
otherwise be caused by spurious system level signals during
V
CC
power-up transitions, or from system noise. The device
is powered up to read array data to avoid accidentally writing
data to the array.
Write Pulse "Glitch" Protection
Noise pulses of less than 5ns (typical) on
OE
,
CE
or
WE
do not initiate a write cycle.
Logical Inhibit
Write cycles are inhibited by holding any one of
OE
=V
IL
,
CE
= V
IH
or
WE
= V
IH
. To initiate a write cycle,
CE
and
WE
must be a logical zero while
OE
is a logical one.
Power-Up Write Inhibit
If
WE
=
CE
= V
IL
and
OE
= V
IH
during power up, the
device does not accept commands on the rising edge of
WE
. The internal state machine is automatically reset to
reading array data on the initial power-up.
相關(guān)PDF資料
PDF描述
A29L040AY Replaced by PT78NR109,PT78ST109 : 9Vout 1.5A Wide Input Positive Step-Down ISR 3-SIP MODULE -40 to 85
A29L040 512K X 8 Bit CMOS 3.0 Volt-only, Uniform Sector Flash Memory
A29L040-70 512K X 8 Bit CMOS 3.0 Volt-only, Uniform Sector Flash Memory
A29L040L-70 512K X 8 Bit CMOS 3.0 Volt-only, Uniform Sector Flash Memory
A29L040V-70 512K X 8 Bit CMOS 3.0 Volt-only, Uniform Sector Flash Memory
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
A29L040AX-70 制造商:AMICC 制造商全稱(chēng):AMIC Technology 功能描述:512K X 8 Bit CMOS 3.0 Volt-only, Uniform Sector Flash Memory
A29L040AX-70F 制造商:AMICC 制造商全稱(chēng):AMIC Technology 功能描述:512K X 8 Bit CMOS 3.0 Volt-only, Uniform Sector Flash Memory
A29L040AY 制造商:AMICC 制造商全稱(chēng):AMIC Technology 功能描述:512K X 8 Bit CMOS 3.0 Volt-only, Uniform Sector Flash Memory
A29L040AY-70 制造商:AMICC 制造商全稱(chēng):AMIC Technology 功能描述:512K X 8 Bit CMOS 3.0 Volt-only, Uniform Sector Flash Memory
A29L040AY-70F 制造商:AMICC 制造商全稱(chēng):AMIC Technology 功能描述:512K X 8 Bit CMOS 3.0 Volt-only, Uniform Sector Flash Memory
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