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參數資料
| 型號： | S71AL016M40 |
| 廠商： | Spansion Inc. |
| 英文描述： | Stacked Multi-Chip Product (MCP) Flash Memory and RAM |
| 中文描述： | 堆疊式多芯片產品（MCP）的閃存和RAM |
| 文件頁數： | 43/68頁 |
| 文件大小： | 728K |
| 代理商： | S71AL016M40 |
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February 23, 2005 S71AL016M_M0_A0
S71AL016M
43
A d v a n c e I n f o r m a t i o n
Under both these conditions, the system must issue the reset command to re-
turn the device to reading array data.
DQ3: Sector Erase Timer
After writing a sector erase command sequence, the system may read DQ3 to
determine whether or not an erase operation 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 com-
mand. When the time-out is complete, DQ3 switches from
0
to
1
. The system
may ignore DQ3 if the system can guarantee that the time between additional
sector erase commands is always less than 50
μ
s. See also
Sector Erase Com-
mand Sequence on page 33
.
After the sector erase command sequence is written, the system should read the
status on DQ7 (Data# Polling) or DQ6 (Toggle Bit I) to ensure the device ac-
cepted the command sequence, and then read DQ3. If DQ3 is
1
, the internally
controlled erase cycle began; all further commands (other than Erase Suspend)
are ignored until the erase operation is complete. If DQ3 is
0
, the device accepts
additional sector erase commands. To ensure the command is accepted, the sys-
tem software should check the status of DQ3 prior to and following each
subsequent sector erase command. If DQ3 is high on the second status check,
the last command might not have been accepted.
Table 11
shows the outputs
for DQ3.
Notes:
1. DQ5 switches to
1
when an Embedded Program or Embedded Erase operation exceeds the maximum timing limits.
See DQ5: Exceeded Timing Limits on page 42 for more information.
2. DQ7 and DQ2 require a valid address when reading status information. Refer to the appropriate subsection for further
details.
Table 11. Write Operation Status
Operation
DQ7
(Note
2)
DQ7#
0
DQ6
Toggle
Toggle
DQ5
(Note 1)
0
0
DQ3
N/A
1
DQ2
(Note 2)
No toggle
Toggle
RY/BY#
0
0
Standard
Mode
Embedded Program Algorithm
Embedded Erase Algorithm
Program
Suspend
Mode
Program-
Suspend Read
Program-
Suspended Sector
Non-Program
Suspended Sector
Invalid (not allowed)
1
Data
1
Erase
Suspend
Mode
Reading within Erase
Suspended Sector
Reading within Non-Erase Suspended
Sector
Erase-Suspend-Program
1
No toggle
0
N/A
Toggle
1
Data
Data
Data
Data
Data
1
DQ7#
Toggle
0
N/A
N/A
0
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