MIPSZ2012D1R0 datasheet(32/48 Pages) PANASONIC

32 / 48 page

AN30183A

Ver. AEB

(1) REGCNT Pin Control setup (excluding LDO1)

Initial setup

1) Select the LDO/DCDC to be controlled by REGCNT

(Address:04h Single Bit from D7-5, D3 should be set to “H”)

Set D0 to “H”

2) Set the LDO/DCDC Startup register mentioned above in ① to “H”

(To control LDO1 set Address:00h D2:LDO1ON to “H”)

Set the LDO to be controlled to Normal Mode (Address:05h Default)

Startup Control

3) LDO/DCDC selected in 1) above will startup when REGCNT is set to “H”

Power Save Mode for the LDO can be controlled by the I2C

When the Startup register mentioned in 2) above (Address:00h) is set to “L”, the LDO/DCDC will turn off.

4) The Startup for LDO/DCDC not selected in 1) can also be controlled by the I2C

5) To turn off the LDO mentioned in 1) above, set the REGCNT to “L”.

When the LDO is turned OFF in the Power Save Mode, reset Address:05h to Normal Mode before turning on

the LDO using the REGCNT pin.

Example Using the REGCNT pin to control LDO2 and LDO3

1) ADDRESS 04h：DATA 61h

2) ADDRESS 00h：DATA 18h

3) Set REGCNT pin “L” to “H” : LDO2,3 Startup

4) Use I2C to control the Output Voltage and Power Save Mode settings

5) To stop LDO2 and LDO3, Set REGCNT from “H” to “L”

(2) Control using the I2C only

Initial Setup

No special settings required after RESET

(ADDRESS 04h Bit D0 set to “L)

(Startup control)

The REGCNT pin should be set to “L” when using the I2C for LDO/DCDC Startup/Shutdown, Power Save Mode

and Output Voltage Setup.

Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed.

OPERATION ( Continued )

3. Register map details

MIPSZ2012D1R0 Datasheet(PDF) 32 Page - Panasonic Semiconductor