v1.0

Stopping receiving or transmitting (OFF)

In the OFF phase, the device is returned to active low power mode to minimize power consumption when RF has stopped.

The syntax of the OFF phase is the following:

AT%XMIPIRFFECTRL=<dev_id>,2,<n>,<address_0>,<data_0>,…,<address_n-1>,<data_n-1>

The following command syntax is an example of stopping to receive or transmit with the %XMIPIRFFECTRL AT command:

AT%XMIPIRFFECTRL=1,2,1,28,184

The command parameters and their values in the example are the following:

Table 1. Parameters in stopping receiving or transmitting example
Parameter name Parameter description Value in example Value description
<dev_id> The identification number of the MIPI RF Front-End Control Interface (RFFE) device given when it was introduced using %XMIPIRFFEDEV. 1  
<use_case#> Number of the use case. INIT = 0, ON = 1, OFF = 2, PWR_OFF = 3. All numbers must be given as decimals (hexadecimals not allowed). 2 OFF phase
<n> The number of address/data pairs. Valid values are 0, 1, 2, 3, 4. If the value is 0, all the following fields must be omitted. 1 Number of register writes in this command
<address_x> The 8-bit address of the internal register in MIPI RFFE device. x = 0, ..., n−1. 28 Address of the PM_TRIG register (= 0x1C)
<data_x> The 8-bit data to be written to <address_x>. x = 0, ..., n−1. 184 Value to write to register address 28

The writes in the OFF phase are applied when RF is turned off. This happens between reception and transmission bursts. During longer breaks in modem usage, the modem is put to sleep and the RFFE device is set to Going to sleep (PWROFF).