Product Info

5G Module Series
RM502Q-GL Hardware Design
RM502Q-GL_Hardware_Design 45 / 77
3.11. Cellular/WLAN Interface*
RM502Q-GL provides a cellular/WLAN COEX interface, the following table shows the pin definition of this
interface.
Table 18: Pin Definition of COEX Interface
“*” means under development.
3.12. Antenna Tuner Control Interface*
ANTCTL[1:2] are used for antenna tuner control and should be routed to an appropriate antenna control
circuit. More details about the interface will be added in the future version of this document.
Table 19: Pin Definition of Antenna Tuner Control Interface
support based on CS2 and later.
Pin No.
Pin Name
I/O
Description
Comment
62
COEX_RXD
DI
LTE/WLAN coexistence receive data
1.8 V power domain
64
COEX_TXD
DO
LTE/WLAN coexistence transmit data
1.8 V power domain
59
LAA_TX_EN
DO
Notification from SDR to WL when
LTE transmitting
1.8 V power domain
60
WLAN_TX_EN
DI
Notification from WL to SDR while
transmitting
1.8 V power domain
Pin No.
Pin Name
I/O
Description
DC Characteristics
61
SDR_GRFC15
DO
GRFC interface dedicated for
external antenna tuner control
V
OL
max = 0.45 V
V
OH
min = 1.35 V
V
OH
max = 1.8 V
63
SDR_GRFC14
DO
NOTE
NOTE