DS1846 Ver la hoja de datos (PDF) - Maxim Integrated

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DS1846

NV Tri-Potentiometer, Memory, and MicroMonitor

Maxim Integrated 

DS1846

WRITE PROTECT

The WP pin protects EEPROM data and potentiometer position from alteration in an application. This pin

must be open or connected high to protect data from alteration. WP has an internal pullup (RWP).

READING AND WRITING THE POTENTIOMETER VALUES

Reading from and writing to the potentiometers consists of a standard read or write to EEPROM memory

at the addresses F8h, F9h, and FAh. The 8-bit value at address F8h controls the wiper setting for

potentiometer 1, which has 256 positions. The 8-bit value at addresses F9h and FAh control the wiper

setting of potentiometer 0 and 2, respectively; each has 100 positions. Potentiometer 1 may be set to any

value between 00h and FFh. A value of 00h sets the wiper of potentiometer 1 to its lowest value and FFh

sets the wiper to its highest. Potentiometer 0 or 2 may be set to any value between 00h and 63h. A value

of 00h sets the wiper of potentiometer 0 or 2 to its lowest position and 63h sets the wiper to its highest

position. Any hexadecimal value is a valid address. Writing a value greater than 63h will set the

potentiometer according to the seven LSBs and the MSB is ignored.

2- WIRE DATA TRANSFER PROTOCOL Figure 2

2-WIRE AC CHARACTERISTICS Figure 3

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