DS1073 Ver la hoja de datos (PDF) - Dallas Semiconductor -> Maxim Integrated

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componentes Descripción

Fabricante

DS1073

3V EconOscillator/Divider

Dallas Semiconductor -> Maxim Integrated 

Figure 10

DS1073

PROGRAMMING

Normally when power is applied to the supply voltage pin the device will enter its normal operating mode

following the power-on reset sequence. However the device can be made to enter a programming mode if

a pullup resistor is connected between I/O and the supply voltage pin, prior to power-up. The method

used for programming is a variant of the 1-Wireä protocol used on a number of Dallas Semiconductor

products.

HARDWARE

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

DS1073’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 DS1073 with a pullup of approximately 5kW.

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

DS1073 to internally release the I/O pin (after tPOR), and allow the pullup resistor to pull the pin to the

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

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