AN2014 datasheet(23/65 Pages) STMICROELECTRONICS

部件名	AN2014

功能描述	How a designer can make the most of STMicroelectronics serial EEPROMs

PDF	65 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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23 / 65 page

DocID10701 Rev 10

23/65

AN2014

Hardware considerations

EEPROM connections are essential for an application’s robustness. During Power up,

Power down and Application Reset, input signals must be fully controlled to avoid

hazardous behavior or random operation. For each product family a good hard-wiring

design can protect the parts from uncontrolled behavior.

4.1

I2C family (M24xxx devices)

4.1.1

Chip enable (E0, E1, E2)

The Chip Enable (E0, E1, E2) inputs have an internal pull-down resistor. It is thus possible

to have the three Chip Enable inputs unconnected (Chip Enable address is then decoded as

‘000’). However, this configuration should be avoided since inputs are still prone to antenna-

like pick-up or other cross coupling effects.

To achieve a robust design, Ei inputs must not be driven dynamically but must be directly

tied to VCC or VSS.

Figure 16. Chip Enable inputs E0, E1, E2

The input leakage current on the Ei pins depends on the input voltage value (Table 4).

AN2014 数据表(PDF) 23 Page - STMicroelectronics