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参数资料
| 型号： | A29L400SERIES |
| 英文描述： | 512K X 8 Bit / 256K X 16 Bit CMOS 3.0 Volt-only. Boot Sector Flash Memory |
| 中文描述： | 为512k × 8位/ 256 × 16位的CMOS 3.0伏特只。引导扇区闪存 |
| 文件页数： | 19/40页 |
| 文件大小： | 387K |
| 代理商： | A29L400SERIES |
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A29L400 Series
PRELIMINARY (October, 2002, Version 0.2)
19
AMIC Technology, Inc.
I/O
5
: Exceeded Timing Limits
I/O
5
indicates whether the program or erase time has
exceeded a specified internal pulse count limit. Under these
conditions I/O
5
produces a "1." This is a failure condition
that indicates the program or erase cycle was not
successfully completed.
The I/O
5
failure condition may appear if the system tries to
program a "1 "to a location that is previously programmed to
"0." Only an erase operation can change a "0" back to a "1."
Under this condition, the device halts the operation, and
when the operation has exceeded the timing limits, I/O
5
produces a "1."
Under both these conditions, the system must issue the
reset command to return the device to reading array data.
I/O
3
: Sector Erase Timer
After writing a sector erase command sequence, the
system may read I/O
3
to determine whether or not an erase
operation has begun. (The sector erase timer does not
apply to the chip erase command.) If additional sectors are
selected for erasure, the entire time-out also applies after
each additional sector erase command. When the time-out
is complete, I/O
3
switches from "0" to "1." The system may
ignore I/O
3
if the system can guarantee that the time
between additional sector erase commands will always be
less than 50
μ
s. See also the "Sector Erase Command
Sequence" section.
After the sector erase command sequence is written, the
system should read the status on I/O
7
(
Data
Polling) or
I/O
6
(Toggle Bit I) to ensure the device has accepted the
command sequence, and then read I/O
3
. If I/O
3
is "1", the
internally controlled erase cycle has begun; all further
commands (other than Erase Suspend) are ignored until
the erase operation is complete. If I/O
3
is "0", the device will
accept additional sector erase commands. To ensure the
command has been accepted, the system software should
check the status of I/O
3
prior to and following each
subsequent sector erase command. If I/O
3
is high on the
second status check, the last command might not have
been accepted. Table 6 shows the outputs for I/O
3
.
START
Read I/O
7
-I/O
0
Toggle Bit
= Toggle
Program/Erase
Operation Not
Commplete, Write
Reset Command
Yes
Notes :
1. Read toggle bit twice to determine whether or not it is
toggling. See text.
2. Recheck toggle bit because it may stop toggling as I/O
5
changes to "1". See text.
No
Read I/O
7
- I/O
0
Twice
I/O
5
= 1
Toggle Bit
= Toggle
Yes
Yes
Program/Erase
Operation Complete
No
No
Read I/O
7
-I/O
0
(Notes 1,2)
Figure 6. Toggle Bit Algorithm
(Note 1)
相关PDF资料 |
PDF描述 |
|---|---|
| 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 |
| A3134*LT | BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMPERATURE OPERATION |
| A3134*UA | BIPOLAR HALL-EFFECT SWITCH FOR HIGH-TEMPERATURE OPERATION |
| A3134ELL | Hall-Effect Switch |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A29L400TG-70 | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:512K X 8 Bit / 256K X 16 Bit CMOS 3.0 Volt-only, Boot Sector Flash Memory |
| A29L400TG-90 | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:512K X 8 Bit / 256K X 16 Bit CMOS 3.0 Volt-only, Boot Sector Flash Memory |
| A29L400TG-90U | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:512K X 8 Bit / 256K X 16 Bit CMOS 3.0 Volt-only, Boot Sector Flash Memory |
| A29L400TM-70 | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:512K X 8 Bit / 256K X 16 Bit CMOS 3.0 Volt-only, Boot Sector Flash Memory |
| A29L400TM-90 | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:512K X 8 Bit / 256K X 16 Bit CMOS 3.0 Volt-only, Boot Sector Flash Memory |
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