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參數(shù)資料
型號: S29CD032J1MQFN133
廠商: SPANSION LLC
元件分類: PROM
英文描述: 1M X 32 FLASH 2.7V PROM, 54 ns, PQFP80
封裝: LEAD FREE, PLASTIC, MO-108CB-1, QFP-80
文件頁數(shù): 35/78頁
文件大小: 1825K
代理商: S29CD032J1MQFN133
38
S29CD-J & S29CL-J Flash Family
S29CD-J_CL-J_00_B1 September27,2006
Prel imi n ary
Notes:
1. Read toggle bit with two immediately consecutive reads to determine whether or not it is toggling.
2. Recheck toggle bit because it may stop toggling as DQ5 changes to 1.
Figure 8.8 Toggle Bit Algorithm
8.8.5
DQ5: Exceeded Timing Limits
DQ5 indicates whether the program or erase time has exceeded a specified internal pulse count
limit. Under these conditions DQ5 produces a 1. This is a failure condition that indicates the pro-
gram or erase cycle was not successfully completed.
The DQ5 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,
DQ5 produces a 1.
Under both these conditions, the system issues the reset command to return the device to read-
ing array data.
START
No
Yes
DQ5 = 1?
No
Yes
DQ6 = Toggle?
No
Read Byte
(DQ0-DQ7)
Address = VA
DQ6 = Toggle?
Read Byte Twice
(DQ 0-DQ7)
Adrdess = VA
Read Byte
(DQ0-DQ7)
Address = VA
FAIL
PASS
(Note 1)
(Notes 1, 2)
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