Preliminary User`s Manual

Preliminary User's Manual l TQMLS102xA UM 0002 l © 2015 TQ-Group Page 17

3.2.6 Deep Sleep

Deep Sleep is an especially efficient energy-saving mode (LPM35), a variation of the LPM20, with which parts of the Core Supply are switched off.

The transition into Deep Sleep is a complicated multistage process, which is partly controlled by software, and partly by a CPUinternal State Machine, which also has to be configured by software.

Note: Supply PROG_SFP

The supply PROG_SFP is exclusively required to program the Security Fuses. In case it is used, a suitable switchable supply must be provided on the carrier board for this special use case.

3.3 DDR3L SDRAM

The maximum memory size is 2 Gbyte, plus ECC. 1 Gbyte is assembled by default, plus ECC.

The LS102x CPU provides the following DDR features:



DDR3L memory interface



Data bus width 32-/36 Bit incl. ECC (LS1022 16Bit + ECC)

There are the following options:



2 × 8 Gbit = 2 Gbyte + ECC



2 × 4 Gbit = 1 Gbyte + ECC



2 × 2 Gbit = 512 Mbyte + ECC