AN923 Datasheet, PDF (4/7 Pages) STMicroelectronics – Managing century information using serial real-time clocks

Devices with a full byte of century data
AN923
The table below summarizes the type of century data provided by the various ST RTC and
TIMEKEEPER devices.
Table 1. Century data provided according to device
Device
Byte⁽¹⁾
Century support
CB1/CB0⁽²⁾ CEB/CB⁽³⁾
None⁽⁴⁾
Product family
M41ST85W
●
M41ST87W
●
M41T0
M41T00
●
Serial RTCs
●
M41T00AUD
●
M41T00CAP
●
M41T00S
●
M41T11
●
M41T56
●
M41T60
●
M41T62
●
M41T63
●
M41T64
●
M41T65
●
M41T66
●
M41T80
●
M41T81
●
M41T81S
●
M41T82
●
M41T83
●
M41T93
●
M41T94
●
M41TC8025
●
M48T201V/Y
●
TIMEKEEPER supervisor
M48T02/12
●
M48T08/08Y/18
●
M48T35/Y
M48T35AV
●
TIMEKEEPER NVRAM
●
M48T37V/Y
●
M48T58
●
1. 1 byte (BCD) which increments once per century
2. 2 century bits which increment once per century
3. 1 century bit which toggles once per century
4. No century information
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