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Cinterion
®
MV31-W Hardware Interface Description
5.5 Timing Sequence Requirement
75
t MV31-W_HID_v01.009a 2022-04-27
Public / Preliminary
Page 61 of 76
Figure 33: Modern Standby D3cold
The Host enabled PCIe
®
reference clock and deasserts PERST# (drive high).
Host Device
Deassert PERST# (drive high)
D0 / L0
Host wakeup condition
Enable PCIe ref
clock
Enable PCIe RC
hardware blocks
Wake up from
sleep mode
(if applicable)
In itialize th e PCIe
RC hardware
blocks
Vote not OK to
sleep
Enable LTSSM
Request IPA
resources (IPA
power mgmt)
Enable PCIe EP
hardware blocks
Init ialize t he PC I e
EP hardware
blocks
Restore MHI
MMIO registers
values
Link training
PCIe enumeration and configuration
Pre requisites:
MState = M3
D State = D3cold
LState = L3
DEVICE_WAKE mechanism = Disabled
Enable LTSSM