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参数资料
| 型号： | A29DL324SERIES |
| 英文描述： | 32M-Bit CMOS Low Voltage Dual Operation Flash Memory 4M-Byte by 8-Bit (Byte Mode) / 2M-Word by 16-Bit |
| 中文描述： | 32兆位的CMOS低电压双操作闪存分字节由8位（字节模式）/ 200万词由16位 |
| 文件页数： | 15/46页 |
| 文件大小： | 467K |
| 代理商： | A29DL324SERIES |
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A29L323 Series
PRELIMINARY (May, 2002, Version 0.0)
15
AMIC Technology, Inc.
Sector Group Protection
This command performs sector group protection.
By applying V
ID
to
RESET
and writing 60H to any address,
the device enters the sector group protection mode.
Sector group protection is started by inputting the sector
group address of the sector group to be protected to A12 to
A20, inputting (A6, A1, A0) = (V
IL
, V
IH
, V
IL
), and writing 60H.
After a timeout of 250
μ
s, sector group protection is
completed.
Next, with the sector group address input to A12 to A20, the
device enters the sector group protection verify mode by
inputting (A6, A1, A0) = (V
IL
, V
IH
, V
IL
), and writing 40H. When
read is performed in this state, the sector group protection
verify result is output to I/O0. If "1" is output to I/O0, the
verified sector group is protected. If "1" was not output to
I/O0, sector group protection failed, so perform sector group
protection again.
For the timing waveform and flow chart, refer to Timing
Waveform for Sector Group Protection and Figure 1.
Sector Group Unprotect
This command performs sector group unprotect.
Sector group unprotect is performed for all sector group.
Unprotect cannot be performed for specific sector group.
Moreover, all sector groups must be protected priors to
unprotect.
The device enters the sector group unprotect mode by
applying VID to
RESET
and writing 60H to any address.
If unprotected sector group exist, first perform sector group
protection for these sector groups. To protect a sector group,
input the sector group address of the sector group to be
protected to the sector group address input pin, input (A6,
A1, A0) = (V
IL
, V
IH
, V
IL
), and write 60H (refer to Sector Group
Protection).
Sector group unprotect is started by inputting (A6, A1, A0) =
(V
IH,
V
IH
, V
IL
), and writing 60H to any address.
Following a timeout of 15 ms, sector group unprotect is
completed.
Unprotect verification must be performed for each sector
group.
The device enters the sector group unprotect verification
mode by inputting the sector group address to input pin of
sector group address and writing 40H, with input (A6, A1, A0)
= (V
IH
, V
IH
, V
IL
).
If reading is performed in this state, the sector group
unprotect verification result is output to I/O
0
. If the verified
sector group is unprotected, "0" is output to I/O
0
. If "0" is not
output to I/O
0
, this means that unprotect failed, so perform
sector group unprotect again.
For the flow chart, refer to Figure 2. Sector Group Unprotect
Flow Chart.
Query
The dual operation flash memory conforms to CFI (Common
Flash memory Interface). CFI enables information about a
device such as the device specifications, memory density,
and supply voltage to be read. Therefore, the software of the
host system can support the software algorithm of a specific
vendor used by a device by using the CFI. For details, refer
to the CFI specifications.
By writing the Query command (98H) and giving an address,
the device information corresponding to that address can be
read. If the device information is read in the WORD mode
(16 bits), the upper bytes of data (I/O
15
to I/O
8
) are "0".
To end the Query mode, writes the read / reset command.
Extra One Time Protect Sector Entry
The dual operation flash memory has a sector area that has
One Time Protect function. This area does not allow code
that has been written to the area to be changed. This area
can be programmed or erased until it is protected.
Once it has been protected, however, protection can never
be canceled. Therefore, care must be exercised when using
this area.
The Extra One Time Protect Sector area has a density of 64
Kbytes and exits at the same addresses as the 8 Kbytes
sector. These addresses are 3F0000H to 3FFFFFH for top
boot in the BYTE mode (1F8000H to 1FFFFFH in the WORD
mode), and 000000H to 00FFFFH for bottom boot in the
BYTE mode (000000H to 007FFFH in the WORD mode).
Because boot block areas (8 Kbytes x 8 sectors) usually
appear in the areas of these addresses, the Extra One Time
Protect Sector entry command sequence must be written to
enter them as the Extra One Time Protect Sector area. The
status in which the Extra One Time Protect Sector area
appears is the Extra One Time Protect Sector mode.
In the Extra One Time Protect Sector mode, the other
sectors, except the boot block area, can be read. In addition,
the Extra One Time Protect Sector area can be read,
programmed, or erased in this mode. To exit from the Extra
One Time Protect Sector mode, the Extra One Time Protect
Sector Reset command sequence must be written.
Extra One Time Protect Sector Program
To program data to the Extra One Time Protect Sector area,
write the Extra One Time Protect Sector Program command
sequence in the Extra One Time Protect Sector mode. This
command is no different from the conventional program
command except that it must be written in the Extra One
Time Protect Sector mode. Therefore, completion of
execution of this command is detected in the same manner
as the conventional detection method of using I/O
7
data
polling, I/O
6
toggle bit, and RY/
BY
. Care must be exercised
in selecting a program destination address. If a program
destination address other than the one in the Extra One Time
Protect Sector area is selected, the data of that address is
changed.
相关PDF资料 |
PDF描述 |
|---|---|
| A29L040SERIES | 512K X 8 Bit CMOS 3.0 Volt-only. Uniform Sector Flash Memory |
| A29L160SERIES | 2M X 8 Bit / 1M X 16 Bit CMOS 3.0 Volt-only. Boot Sector Flash Memory |
| A29L400SERIES | 512K X 8 Bit / 256K X 16 Bit CMOS 3.0 Volt-only. Boot Sector Flash Memory |
| A29L800SERIES | 1M X 8 Bit / 512K X 16 Bit CMOS 3.0 Volt-only. Boot Sector Flash Memory |
| A31-1 | 10 TO 2000 MHz CECASCADABLE AMPLIFIER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A29DL324TG-120 | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:32 Megabit (4M x 8-Bit/2M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| A29DL324TG-70 | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:32 Megabit (4M x 8-Bit/2M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| A29DL324TG-80 | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:32 Megabit (4M x 8-Bit/2M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| A29DL324TG-90 | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:32 Megabit (4M x 8-Bit/2M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
| A29DL324TV-120 | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:32 Megabit (4M x 8-Bit/2M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory |
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