AN2014 datasheet(39/65 Pages) STMICROELECTRONICS

Datenblatt-Suchmaschine für elektronische Bauteile

AN2014 Datenblatt(PDF) 39 Page - STMicroelectronics

Teilenummer	AN2014

Bauteilbeschribung	How a designer can make the most of STMicroelectronics serial EEPROMs

PDF	65 Pages

Scroll/Zoom	100%

Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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39 / 65 page

DocID10701 Rev 10

39/65

AN2014

Software considerations

Figure 33. I2C data polling algorithm

1. Using the READ Device code (R/W = 1) is hazardous due to I2C protocol constraints.

SPI products

In SPI products, a specific instruction (Read Status Register - RDSR) is used to check the

status of the WIP (Write In Progress) bit in the Status Register. A loop on the RDSR

command (RDSR instruction + Data byte) checks the WIP bit status. As soon as it returns to

"0", the device is ready to accept new commands. For compatibility reasons, it is

recommended to send the full RDSR command each time instead of continuously reading

the status register.

Ai11083

START

Device select byte

with R/W = 0 (1)

ACK?

STOP

Ready for new command

Yes

Write in Progress

(Re)START

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