xE922-3GR Hardware User Guide
1VV0301272
Rev.0.8 2017-01-05
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
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Page 17 of 112
o
Reduction of switching power consumption by clock gating.
o
Reduction of leakage power by switching off non active logic.
o
Dynamic Frequency Voltage Scaling reducing the supply voltage
depending on the perfomance requirements of the system
·
The following system operating modes are defined :
o
OFF : complete system switched off ( all context lost)
o
WORKING : CPU executing scheduled tasks
o
IDLE : CPU in power state HALT , waiting for interrupt
o
DEEP SLEEP: CPU in power state DORMANT
H)
Application processor
The Intel virtual machine manager (VMM) shares CPU resources of the quad core Atom
between the cellular DBB modem high level protocol implementation, the applied OS and
customer applications. Available BSP’s are
32bit Android and 32bit Linux (Yocto project).
The chipset external memory interface controller EMIC supports
·
Low power LPDDR3 upto 2Gbyte
clock frequency up to 533MHz (data speed 1066 Mbps/pin)
·
embedded MMC card interface eMMC4.51
clock frequency up to 52MHz ( data speed DDR 102 Mbps/pin)
(dataspeed DDR transfer)
Module embedded memory size implementation :
·
FLASH eMMC: 8 Gbyte (x8 pin, data speed up to 833 Mbps)
·
RAM LPDDR3: 1 Gbyte ( x32 pin, data speed up to 34112 Mbps)
I)
Security capabilities of DBB:
Intergrated Trusted Executon Environment (TEE) based on Secure Virtual Machine and
HW Crypto Unit (CEU)
·
Atom Quad Core:
VT-x2 / AES-NI / SMEP ( Supervisor Mode Execution Privilege)
·
Extensible Secure Execution Environment:
HW crypto accelerator
–
CEU / 256K SRAM
·
Configurable execution unit (CEU):
o
DES/3DES
o
AES(128,192,256)