DS1075 데이터 시트보기 (PDF) - Dallas Semiconductor -> Maxim Integrated

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DS1075

EconOscillator/Divider

Dallas Semiconductor -> Maxim Integrated 

DS1075

HARDWARE

The hardware configuration is shown in the diagram. A bus master is used to read and write data to the

DS1075’s internal registers. The bus master may have either an open-drain or TTL-type architecture.

Figure 11

Programming mode is entered by simply powering up the DS1075 with a pull-up of approximately 5KW.

This will pull the IN/OUT pin above VIH on power-up and initiate the programming mode, causing the

DS1075 to internally release the IN/OUT pin (after tPOR), and allow the pull-up resistor to pull the pin to

the supply rail and await the Master Tx Reset pulse (see diagram).

NOTE:

To ensure normal operation any external pull-up applied to IN/OUT must be greater than 20KW in value.

This will cause the IN/OUT pin to remain below VIH on power-up, resulting in normal operation at the

end of tSTAB.

Figure 12

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