Approval Sheet

Page 5 of 14

ASC_RMASMU890ATF03_V02

Nov. 2017

Operating States

The RMASMU890ATF03 has four operating states, that are ACTIVE, SHUTDOWN, STATUP and LOW POWER. The

transitions between these four states are set writing the PWR_MODE register or VIO as shown in Figure 4. The internal

circuit operations in each operating state are shown in Table 4.

Figure 4. Slave State Diagram

Table 4. RMASMU890ATF03 Internal Operations (Note 1)

Operating State

RFFE Slave Controller

RF Switch Core

Charge Pump

SHUTSOWN

Inactive

Undetermined (Note1)

Off

STARTUP

All registers are set to Default value

Undetermined (Note1)

Off

ACTIVE

Active

Controllable by mipi-command

On

LOW POWER

Active

Undetermined (Note1)

Off

Note 1 : All switch are insufficiently On or Off as the Charge pump is not powered up.

Figure 5. LOW POWER to AVTIVE Process

Note 2 : Vcp is the output voltage of internal charge-pump circuit. The Vcp traces in above figure are only image for

illustrative purpose.

SHUTDOWN

LOW POWER

STARTUP

(All Resisters Reset to Default)

ACTIVE

PWR_MODE=0b10

PWR_MODE=0b00

VIO=HIGH

VIO=LOW

PWR_MODE=0b01

(automatic)

Register Write Command

(PWR_MODE=0b00)

SCLK

SDATA

Vcp

(note2)

Slave State

Tsu

RF switch activate time

SSC

P

BP

(During this transition,

don

’t write Switch_State Register)

ACTIVE

state

LOWPOWER

state