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M14A2A User Manual
MODEM_WAKEUP
HOST_WAKEUP
Modem
wakeup
Host and modem
communicating
Host and modem
may go to sleep
SoC
wakeup
SoC and modem
communicating
Host
wakes
modem.
Modem
ready
Host allows modem to
go to sleep, but
modem still needs SoC.
Modem also allows
host to go to sleep.
Modem
wakes
host.
Host
ready
Modem allows host to
go to sleep, but host
still needs modem.
Host and modem allow
each other to go to
sleep.
Figure 4.
Host-modem mutual wake-up interface
MODEM_WAKEUP Host: Output,
Modem: Input):
LOW: SoC does not need the MODEM (allowing it to sleep).
HIGH: SoC needs the MODEM or acknowledges it is ready following a wakeup request from the
MODEM.
HO“T_WAKEUP Host: I put, Mode : Output :
LOW: MODEM does not need the Host (allowing it to sleep).
HIGH: MODEM needs the Host or acknowledges it is ready following a wakeup request from the
SoC.
2.5.3.
Reset Signal
The Reset Signal is a hardware reset signal to control the system reset directly. You can connect it to a
key or a control signal. It was recommended to reserve a pull up resistor and a capacitor to ground.
Default is not installed.
It is required that the Reset Signal is kept LOW for at least 100 ms after a command to reset the module
has been issued to ensure that there is time for the module reset properly
.
