bq4285E/L
DSE - Daylight Saving Enable
UIE - Update Cycle Interrupt Enable
7
-
6
-
5
-
4
-
3
-
2
-
1
-
0
7
-
6
-
5
-
4
3
-
2
-
1
-
0
-
DSE
UIE
This bit enables daylight-saving time adjustments when
written to 1:
This bit enables an interrupt request due to an update
ended interrupt event:
n
On the last Sunday in October, the first time the
bq4285E/L increments past 1:59:59 AM, the time
falls back to 1:00:00 AM.
1 = Enabled
0 = Disabled
The UIE bit is automatically cleared when the UTI bit
equals 1.
n
On the first Sunday in April, the time springs
forward from 2:00:00 AM to 3:00:00 AM.
AIE - Alarm Interrupt Enable
7
-
6
-
5
-
4
-
3
-
2
-
1
0
-
HF
7
-
6
-
5
4
-
3
-
2
-
1
-
0
-
AIE
HF - Hour Format
This bit selects the time-of-day and alarm hour format:
1 = 24-hour format
This bit enables an interrupt request due to an alarm
interrupt event:
1 = Enabled
0 = Disabled
0 = 12-hour format
7
-
6
-
5
-
4
-
3
-
2
1
-
0
-
PIE - Periodic Interrupt Enable
DF
7
-
6
5
-
4
-
3
-
2
-
1
-
0
-
DF - Data Format
PIE
This bit selects the numeric format in which the time,
alarm, and calendar bytes are represented:
This bit enables an interrupt request due to a periodic
interrupt event:
1 = Binary
0 = BCD
1 = Enabled
0 = Disabled
7
-
6
-
5
-
4
-
3
2
-
1
-
0
-
UTI - Update Transfer Inhibit
SQWE
7
6
-
5
-
4
-
3
-
2
-
1
-
0
-
SQWE - Square-Wave Enable
UTI
This bit enables the square-wave output:
1 = Enabled
This bit inhibits the transfer of RTC bytes to the user
buffer:
0 = Disabled and held low
1 = Inhibits transfer and clears UIE
0 = Allows transfer
10
TI [ TEXAS INSTRUMENTS ]
