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| DM74121N资料 | |
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DM74121N PDF Download |
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File Size : 105 KB
Manufacturer:NS Description:BUS OPERATIONS There are five standard bus operations that control the device. These are Bus Read, Bus Write, Out- Put Disable, Standby and Automatic Standby. See Tables 5 and 6, Bus Operations, for a summary. Typically glitches of less than 5ns on Chip Enable or Write Enable are ignored by the memory and do not affect bus operations. Bus Read. Bus Read operations read from the memory cells, or specific registers in the Com- mand Interface. A valid Bus Read operation in- volves setting the desired address on the Address Inputs, applying a Low signal, V IL, to Chip Enable and Output Enable and keeping Write Enable High, VIH. The Data Inputs/Outputs will output the value, see Figure 8, Read Mode AC Waveforms, and Table 14, Read AC Characteristics, for details of when the output becomes valid. Bus Write. Bus Write operations write to the Command Interface. A valid Bus Write operation begins by setting the desired address on the Ad- dress Inputs. The Address Inputs are latched by the Command Interface on the falling edge of Chip |
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| 1PCS | 100PCS | 1K | 10K | ||
| 价 格 | |||||
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型 号：DM74121N 厂 家：NS 封 装：95+ 批 号：38 数 量： 说 明： |
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