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参数资料
| 型号： | S29AL008D90MAI011 |
| 厂商： | SPANSION LLC |
| 元件分类： | PROM |
| 英文描述： | 8 Megabit (1 M x 8-Bit/512 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| 中文描述： | 512K X 16 FLASH 3V PROM, 90 ns, PDSO44 |
| 封装： | MO-180AAA, SOP-44 |
| 文件页数： | 24/52页 |
| 文件大小： | 2004K |
| 代理商： | S29AL008D90MAI011 |
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S29AL008D
S29AL008D_00_A11 February 27, 2009
Da ta
Sh e e t
9.6
DQ5: Exceeded Timing Limits
DQ5 indicates whether the program or erase time exceeded a specified internal pulse count limit. Under
these conditions DQ5 produces a 1. This is a failure condition that indicates the program 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 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.
9.7
DQ3: Sector Erase Timer
After writing a sector erase command sequence, the system may read DQ3 to determine whether or not an
erase operation started. (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, 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 s. See also Sector Erase Command Sequence on page 24.
Figure 9.2 Toggle Bit Algorithm
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 DQ5 changes to 1. See text.
START
No
Yes
DQ5 = 1?
No
Yes
Toggle Bit
= Toggle?
No
Program/Erase
Operation Not
Complete, Write
Reset Command
Program/Erase
Operation Complete
Read DQ7–DQ0
Toggle Bit
= Toggle?
Read DQ7–DQ0
Twice
Read DQ7–DQ0
(Notes
1, 2)
相关PDF资料 |
PDF描述 |
|---|---|
| S29AL016D90BAN012 | 1M X 16 FLASH 3V PROM, 90 ns, PBGA48 |
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| S29AL016M10FFI010 | 16 MEGABIT (2M X 8 BIT / I M X 16 BIT) 3.0 VOLT ONLY BOOT SECTOR FLASH MEMORY |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| S29AL008D90MAI012 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:8 Megabit (1 M x 8-Bit/512 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| S29AL008D90MAI013 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:8 Megabit (1 M x 8-Bit/512 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| S29AL008D90MAI020 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:8 Megabit (1 M x 8-Bit/512 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| S29AL008D90MAI021 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:8 Megabit (1 M x 8-Bit/512 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| S29AL008D90MAI022 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:8 Megabit (1 M x 8-Bit/512 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
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