Product Info

LTE-A Module Series
EM121R-GL Hardware Design
EM121R-GL Hardware Design 53 / 80
Table 27: Pin definition of WLAN_PA_EN for EM121R-GL
4.6. Cellular/WLAN COEX Interface*
The module provides the cellular/WLAN COEX interface, the following table shows the pin definition of
this interface.
Table 28: Pin Definition of COEX Interface
4.7. Antenna Tuner Control Interface*
ANTCTL [0:3] and RFFE interface 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.
4.7.1. Antenna Tuner Control Interface through GPIOs
Table 29: Pin Definition of Antenna Tuner Control Interface through GPIOs
Pin No.
Pin Name
I/O
Description
Comment
60
WLAN_PA_EN
DI, PD
Self-protection of QLN4650
control
1.8 V
Pin No.
Pin Name
I/O
Description
DC Characteristics
62
COEX_RXD
DI, PD
LTE/WLAN coexistence receive
1.8 V
64
COEX_TXD
DO, PD
LTE/WLAN coexistence transmit
1.8 V
Pin No.
Pin Name
I/O
Description
DC Characteristics
59
ANTCTL0
DO, PD
Antenna GPIO Control
1.8 V
61
ANTCTL1
DO, PD
1.8 V
63
ANTCTL2
DO, PD
1.8 V
65
ANTCTL3
DO, PD
1.8 V