參數(shù)資料
型號： AM29LV160MT70RFI
廠商： ADVANCED MICRO DEVICES INC
元件分類： PROM
英文描述： 16 Megabit (2 M x 8-Bit/1 M x 16-Bit) MirrorBit TM 3.0 Volt-only Boot Sector Flash Memory
中文描述： 1M X 16 FLASH 3V PROM, 70 ns, PDSO48
封裝： REVERSE, MO-142B, TSOP-48
文件頁數(shù)： 40/63頁
文件大小： 967K
代理商： AM29LV160MT70RFI
38
Am29LV160M
25974B5 January31,2007
D a t a S h e e t
change a “ 0” back to a “ 1.”
Under this condition, the device halts the opera-
tion, and when the operation exceeds the timing limits, DQ5 produces a “1.”
Under both these conditions, the system must issue the reset command to return
the device to reading array data.
DQ3: Sector Erase Timer
After writing a sector erase command sequence, the system may read DQ3 to de-
termine whether or not an erase operation starts. (The sector erase timer does
not apply to the chip erase command.) If additional sectors are selected for era-
sure, the entire time-out also applies after each additional sector erase command.
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 sec-
tor erase commands is always less than 50
μ
s. See also the
“Sector Erase
Command Sequence” on page 27
.
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 accepted
the command sequence, and then read DQ3. If DQ3 is “1”, the internally con-
trolled erase cycle started; 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 12
shows the outputs for
DQ3.
Table 12.
Write Operation Status
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 37
for more information.
2. DQ7 and DQ2 require a valid address when reading status information. Refer to the appropriate subsection for further
details.
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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