General-purpose I/Os (GPIO) RM0401
146/771 RM0401 Rev 3
Calibration
out output PP
01
Don’t
care
Don’t
care
Don’t care Don’t care Don’t care
TAMPER1
input floating
0 0 1 0 0 Don’t care Don’t care
TIMESTAMP
and
TAMPER1
input floating
0 0 1 1 0 0 Don’t care
TIMESTAMP
input floating
0 0 0 1 Don’t care 0 Don’t care
Standard
GPIO
0 0 0 0 Don’t care Don’t care Don’t care
1. OD: open drain; PP: push-pull.
Table 26. RTC additional functions
(1)
(continued)
Pin
configuration
and function
RTC_ALARM
enabled
RTC_CALIB
enabled
Tamper
enabled
Time
stamp
enabled
TAMP1INSEL
TAMPER1
pin selection
TSINSEL
TIMESTAMP
pin
selection
ALARMOUTTYPE
RTC_ALARM
configuration