What is the device address of the M24LR64 - R?

[Ken Inoue]

Posted on November 28, 2017 at 07:05

What is the device address of the M24LR64 - R? I am studying I2C using X-NUCLEO-NFC 02 A 1. X-NUCLEO-NFC02A1 has EEPROM (M24LR64-R). However, I do not know the device address of the M24LR64 - R. Even if I looked at the data sheet, I could not understand where it is written because of beginners. I am happy if you give me a hint.

Best Regards,

Ken Inoue

[AvaTar · Accepted solution]

Posted on November 28, 2017 at 09:10

Does the X-NUCLEO-NFC02A1 user manual say something about it ?

Checking the M24LR64-R datasheet,it says:

The device select code consists of a 4-bit device type identifier, and a 3-bit Chip Enable “Address� (E2, E1, E0). To address the memory array, the 4-bit device type identifier is 1010b.

Address bits E1 and E0 are defined by external pins, so check the schematics.

E2 depends on the memory range you want to access.

[Ken Inoue]

Posted on November 30, 2017 at 09:21

Dear Mr./Ms. AvaTar

Thanks to you I understood.

Thanks.

Best Regards,

Ken Inoue