PSM Application Note r2

80471NT11483A Rev. 2 Page 19 of 24 2017-06-06
4.5.3. SIM Lines control
In order to ensure the 3GPP Rel.12 compliance when using the SIM in PSM states it is
suggested to use two latches on the SIM_RST and SIM_CLK lines.
The two latches are enabled by the PSM_STATUS line.