topic Re: device detection PCF2127 vs PCF2131 in Other NXP Products

device detection PCF2127 vs PCF2131

GCSI — Tue, 14 Mar 2023 20:25:39 GMT

is there a fairly simple way for a software driver to detect which rtc device is installed? We started off with PCF2127 but are redesigning for other reasons and considering moving to PCF2131 due to PCF2127 status of NRND. but software must support both devices.

Re: device detection PCF2127 vs PCF2131

TomasVaverka — Wed, 15 Mar 2023 11:43:01 GMT

Hi Todd,

Unfortunately there is no WHO_AM_I register or similar available on both RTCs, but you can read for example the PWRMNG[2:0] bits in the Control_3 register which are 0b000 by default on the PCF2127 and 0b111 on the PCF2131.

Best regards,

Tomas

Re: device detection PCF2127 vs PCF2131

rubensjunior — Mon, 08 Jan 2024 19:01:35 GMT

@TomasVaverka Are there any news about this?

Re: device detection PCF2127 vs PCF2131

rubensjunior — Mon, 08 Jan 2024 19:13:05 GMT

Are there any news about this?