Specifications

COMPANY CONFIDENTIAL
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We also dual layout UART Tx/Rx with COEX1 and COEX2 for future extension, please
contact with us if need to use these Pins.
Item Signal name Description
COEX1 LTE_ACTIVE (COEX_TXD) TBD
COEX2 LTE_FRAME_SYNC (COEX_RXD) TBD
COEX3 LTE_WLAN_PRIORITY TBD
1.5.13 RESET#
Asynchronous RESET# pin, active low. Whenever this pin is active, the modem will
immediately be placed in a Power On reset condition. Care should be taken not to activate
this pin unless there is a critical failure and all other methods of regaining control and/or
communication with the WWAN sub-system have failed.
The Reset# signal is relatively sensitive, it is recommended to install one capacitor
(10~100pF) near to the M.2 card pin.
1.5.14 Power off Timing Requirement
When OS enter to S4, S5 state (Windows) or Power off (Linux) by M.2 PIN#6
(FULL_CARD_POWER_OFF#),
(1). For Window 10, need platform to perform M.2 PIN#6 (Full_Card_Power_Off ) after
sending CID_MBIM_MSHOSTSHUTDOWN to DW5821e and receiving
CID_MBIM_MSHOSTSHUTDOWN MBIM_COMMAND_DONE from Module side
(2). For Windows 7 or Linux, Need platform to provide power 2 seconds at least after M.2
PIN#6 (Full_Card_Power_Off )for Win7 and Linux
Refer application note about Power off Timing Requirement and Sequence