5G Module Series
RM505Q-AE Hardware Design
RM505Q-AE_Hardware_Design 45 / 79
3.11.5. DPR*
RM505Q-AE provides a DPR (Dynamic Power Reduction) pin for body SAR (Specific Absorption Rate)
detection. The signal is sent from the proximity sensor of a host system to RM505Q-AE module to provide
an input trigger, which will reduce the output power in radio transmission.
Table 18: Function of the DPR Signal
See
document [2]
for more details about the command
AT+QCFG="sarcfg"
.
3.11.6. STATUS*
RM505Q-AE provides two status indication pins for communication with IPQ807x device. Pin 38
(SDX2AP_STATUS) outputs the status indication signal to IPQ807x device, and pin 68
(AP2SDX_STATUS) inputs the status indication signal from IPQ807x device.
3.12. Cellular/WLAN Interface*
RM505Q-AE provides a cellular/WLAN COEX interface, the following table shows the pin definition of this
interface.
Table 19: Pin Definition of COEX Interface
DPR Level
Function
High/Floating
NO max. transmitting power backoff
Low
Max. transmitting power backoff by
AT+QCFG="sarcfg"
Pin No. Pin Name
I/O
Description
Comment
62
COEX_RXD
DI
LTE/WLAN coexistence receive
1.8 V power domain
64
COEX_TXD
DO
LTE/WLAN coexistence transmit
1.8 V power domain
59
LAA_TX_EN
DO
Notification from SDR to WLAN when
transmitting via LTE
1.8 V power domain
NOTE