Quectel EG915U-EU Manual page 23

DBG_TXD 23
I2C Interface
Pin Name Pin No.
I2C_SCL 40
I2C_SDA 41
I2S Interface*
Pin Name Pin No.
I2S_CLK* 63
PCM Interface
Pin Name Pin No.
PCM_SYNC 5
PCM_CLK 4
EG915U-EU_Hardware_Design
DO Debug UART receive
I/O Description
I2C serial clock (for
OD
external codec)
I2C serial data (for
OD
external codec)
I/O Description
DO I2S clock
I/O Description
DI PCM data frame sync
DI PCM clock
LTE Standard Module Series
V max = 2.0 V open.
IH
V max = 0.45 V
OL
V min = 1.35 V
OH
DC
Comment
Characteristics
External pull-up
resistor is
required.
1.8 V only. If
unused, keep it
open. If the I2C
interface is used
to connect to
external codec, it
cannot connect
to other external
devices.
DC
Comment
Characteristics
If unused, keep it
open.
The function is
under
development, we
do not
recommend
customers to use
it.
DC
Comment
Characteristics
V min = -0.3 V
IL
V max = 0.6 V 1.8 V power
IL
V min = 1.26 V domain.
IH
V max = 2.0 V
If unused, keep it
IH
open.
V min = -0.3 V
IL
V max = 0.6 V Only support
IL
V min = 1.26 V slave mode.
IH
V max = 2.0 V
IH
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