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Enabling M24LR16E-R Energy Harvester

Question asked by porcarelli.danil.001 on Oct 18, 2013
Latest reply on Nov 5, 2013 by ST NFC
Hi to all,
I'm using a self-made eval board based on the M24LR16E-R dual EEPROM chip. It is very simple as it consists of the EEPROM chip, filter capacitors, pull-up resistors and, obviously the antenna.
RF signal is received by the same 15x15mm double layer antenna used in ANT7-M24LR16E.
As the energy harvester is disabled by default, I tried to enable it by writing the config byte using I2C interface. More precisely:
_ I set bit E2 =1 and bit RW = 0 in the device select code
_ I set the bit EH_mode = 0 in the Config byte at address 2320h
The I2C communication happens as follow:
START -> DEV.SELECT -> ADDR MSB -> ADDR LSB -> CONF.BYTE -> STOP
All the byte sent (address and data) have been acknowledged correctly, but the energy harvester results still disabled.
Any help?


Kind regards
D.Porcarelli


P.S: as RF transmitter I'm using the transnmitter in the M24LR discovery kit. The attached file is a screenshot of the SDA and SCL signals

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