Power Supply Control Register - Panasonic MN101L Series User Manual

4.3.3

Power Supply Control Register

Power Supply Control Register 0 (PWCTR0: 0x03F6C)
The power supply control register 0 controls the switching V
bp 7
Bit name Reserved
Initial value 1
Access R/W
bp Bit name
7-2
Reserved
1-0 VDDLV1-0
Insert 3 NOP instructions right after the instruction to change VDD18 (write instruction to the
PWCTR0.VDDLV1-0).
.. ..
When using the instruction to change VDD18, disable the DMA transfer function.
.. ..
PWCTR0 register can be update only in SLOW mode.
.. ..
The voltage of VDD18 can be changed to match the following conditions.
- "1.1 V to 1.8 V" or "1.8 V to 1.1 V"
- "1.1 V to 1.3 V" or "1.3 V to 1.1 V"
..
The voltage of VDD18 must not be changed in the following conditions.
- "1.3 V to 1.8 V" or "1.8 V to 1.3 V"
..
6 5
Reserved Reserved
0 0
R/W R/W
Always set to "000000".
If the value other than 0 is set, this register value is not updated.
Select output voltage, VDD18
00: 1.1 V
01: 1.3 V
10: 1.8 V
11: Setting is prohibited.
output of the power supply generation circuit.
DD18
4 3
Reserved Reserved
0 0
R/W R/W
Description
Clock/ Mode/ Voltage Control
2 1
Reserved VDDLV1
0 0
R/W R/W
Voltage Control
Chapter 4
0
VDDLV0
0
R/W
IV - 27