M41ST85WMX6TR contains an embedded 32.768KHz crystal, but it has not any crystal’s information in RTC’s spec or design note, so what's the crystal used in M41ST85WMX6TR? Or what's the embedded crystal's electrical parameter

[Wwang.11]

M41ST85WMX6TR contains an embedded 32.768KHz crystal, but it has not any crystal’s information in RTC’s spec or design note, so what's the crystal used in M41ST85WMX6TR? Or what's the embedded crystal's electrical parameter