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參數(shù)資料
| 型號： | SA25F020LEM8 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | RES 69.8 OHM 1/10W .5% 0805 SMD |
| 中文描述： | 2MB的串行閃存與25MHz的SPI總線接口 |
| 文件頁數(shù)： | 15/37頁 |
| 文件大?。?/td> | 560K |
| 代理商： | SA25F020LEM8 |
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SA25F020 Advanced Information
SAIFUN
15
Chip Select (CSb)
The SA25F020 is selected when the CSb
pin is low. When the device is not selected,
data is not accepted via the SI pin, and the
SO pin remains in a high impedance state.
Hold Condition
The HOLDb pin is used in conjunction with
the CSb pin to select the SA25F020. When
the device is selected and a serial
sequence is underway, HOLDb can be
used to pause the serial communication
with the master device without resetting the
serial sequence.
To enter the hold condition the device must
be selected, with CSb low.
As shown in Figure 8, the Hold condition
starts on the falling edge of the HOLDb
signal, provided that SCK is low. The Hold
condition ends on the rising edge of the
HOLDb signal, provided that SCK is low. If
the falling edge does not coincide with SCK
being low, the Hold condition starts only
after SCK next goes low.
Similarly, if the
rising edge does not coincide with SCK
being low, the Hold condition ends only
after SCK next goes low.
During the Hold condition, SO is high
impedance, and SI and SCK are Don’t
Care. In most cases, the device is kept
selected, with CSb driven low, for the entire
duration of the Hold condition, which
ensures that the internal logic state
remains unchanged from the moment it
enters the Hold condition.
NOTE:
Driving CSb high while HOLDb is still
low is not a legal operation.
Hold
Condition
(Standard Use)
Hold
Condition
(Non-Standard Use)
SCK
HOLD
Figure 8. Hold Condition
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SA25F020LEM8F | 4 Mbit Uniform Sector, Serial Flash Memory |
| SA25F020LEMLF | 4 Mbit Uniform Sector, Serial Flash Memory |
| SA25F020LEMLFF | 4 Mbit Uniform Sector, Serial Flash Memory |
| SA25F020LEN | RES 82.5 OHM 1/10W .5% 0805 SMD |
| SA25F020LEMLFFX | 4 Mbit Uniform Sector, Serial Flash Memory |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SA25F020LEM8F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2Mb Serial Flash with 25MHz SPI Bus Interface |
| SA25F020LEM8FX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2Mb Serial Flash with 25MHz SPI Bus Interface |
| SA25F020LEMLF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2Mb Serial Flash with 25MHz SPI Bus Interface |
| SA25F020LEMLFF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2Mb Serial Flash with 25MHz SPI Bus Interface |
| SA25F020LEMLFFX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2Mb Serial Flash with 25MHz SPI Bus Interface |
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