LENA-R8 series - System integration manual
UBX-22015376 - R02
System description
Page 12 of 116
C1-Public
Function Pin name
Pin no.
I/O Description
Remarks
GNSS
UART
TXD_GNSS
47
O
GNSS UART data
output
LENA-R8001M10 only. GNSS UART data output.
See section
for functional description.
See section
for external circuit design-in.
Internally not connected on LENA-R8001.
RXD_GNSS
48
I
GNSS UART data
input
LENA-R8001M10 only. GNSS UART data input.
See section
for functional description.
See section
for external circuit design-in.
Internally not connected on LENA-R8001.
Cellular
USB
VUSB_DET
17
I
Cellular USB detect
input
VBUS (5 V typ) must be connected to this pin during the
switch-on boot sequence of the module to enable the USB
interface, supporting AT / data communication, FOAT,
FW update by dedicated tool, diagnostic.
Test-Point for diagnostic / FW update very recommended
See section
for functional description.
See section
for external circuit design-in.
USB_D-
28
I/O USB Data Line D-
USB interface supporting AT / data communication, FOAT,
GNSS tunneling, FW update by dedicated tool, diagnostic.
90
nominal differential impedance (Z0)
30
nominal common mode impedance (ZCM)
Pull-up or pull-down resistors and external series resistors
as required by the USB 2.0 specifications
are part of
the USB pin driver and need not be provided externally.
Test-Point for diagnostic / FW update very recommended
See section
for functional description.
See section
for external circuit design-in.
USB_D+
29
I/O USB Data Line D+
USB interface supporting AT / data communication, FOAT,
GNSS tunneling, FW update by dedicated tool, diagnostic.
90
nominal differential impedance (Z0)
30
nominal common mode impedance (ZCM)
Pull-up or pull-down resistors and external series resistors
as required by the USB 2.0 specifications
are part of
the USB pin driver and need not be provided externally.
Test-Point for diagnostic / FW update very recommended
See section
for functional description.
See section
for external circuit design-in.
USB_BOOT
33
I
Cellular USB boot
Input to force FW update over cellular USB.
Test-Point for FW update very recommended.
See section
for functional description.
See section
for external circuit design-in.
Cellular
I2C
SCL
27
O
Cellular I2C clock
1.8 V open drain, for communication with external u-blox
GNSS chips / modules, and other I2C devices.
Internal 20 k
active pull-up to V_INT.
See section
for functional description.
See section
for external circuit design-in.
SDA
26
I/O Cellular I2C data
1.8 V open drain, for communication with external u-blox
GNSS chips / modules, and other I2C devices.
Internal 20 k
active pull-up to V_INT.
See section
for functional description.
See section
for external circuit design-in.
Cellular
Audio
I2S_TXD
35
O Cellular I2S
transmit data
Digital audio data output.
See sections
for functional description.
See sections
for external circuit design-in.
I2S_RXD
37
I
Cellular I2S receive
data
Digital audio data input.
See sections
for functional description.
See sections
