AT73C224-F_14 Datasheet, PDF (30/75 Pages) ATMEL Corporation – Ultra-low Power Real-time Clock (RTC) and Backup Battery Management

6.2.7 LDO3 Control Register
Register Name:
LDO3_CTRL
Access Type:
Read/Write
Address:
0x16
7
6
5
4
3
2
1
0
–
–
–
–
–
–
–
EN(*)
A minimum of 3 clock cycles of 15 kHz clock must be waited after any write operation before doing a new register access.
• EN:
Writing EN to 1 starts the LDO3 regulator.
Writing EN to 0 stops the LDO3 regulator.
(*): Default value depends on the chosen AT73C224-x device (see Section 5.2).
6.2.8 LDO3 Configuration Register
Register Name:
LDO3_CFG
Access Type:
Read/Write
Address:
0x17
7
6
5
4
–
–
–
–
3
2
1
0
–
MODE
OUTZ
–
1
1
• OUTZ:
Defines the state of the voltage output when the regulator is off.
0: the output is forced to ground.
1: the output is left floating (Hz).
This bit should be at 1 when LDO is on.
• MODE:
0: RF mode, I_MAX = 100 mA.
1: Smoother mode, I_MAX = 200 mA.
30 AT73C224
6266A–PMAAC–08-Sep-08