Ublox LENA-R8 Series System Integration Manual Download

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LENA-R8 series - System integration manual

UBX-22015376 - R02

System description

Page 13 of 116

C1-Public

Function Pin name

Pin no.

I/O Description

Remarks

I2S_CLK

Cellular I2S bit clock Digital audio bit clock.

See sections

1.11

for functional description.

See sections

2.7

for external circuit design-in.

I2S_WA

Cellular I2S word
alignment

Digital audio word alignment synchronization signal.
See sections

1.11

for functional description.

See sections

2.7

for external circuit design-in.

Clock
output

GPIO6

Cellular Clock
output

1.8 V clock output.
See section

1.12

for functional description.

See section

2.7

for external circuit design-in.

Cellular
GPIOs

GPIO1

I/O Cellular GPIO

1.8 V GPIO with alternatively configurable functions.
See section

1.13

for functional description.

See section

2.8

for external circuit design-in.

GPIO2

I/O Cellular GPIO

1.8 V GPIO with alternatively configurable functions.
See section

1.13

for functional description.

See section

2.8

for external circuit design-in.

GPIO3

I/O Cellular GPIO

1.8 V GPIO with alternatively configurable functions.
See section

1.13

for functional description.

See section

2.8

for external circuit design-in.

GPIO4

I/O Cellular GPIO

1.8 V GPIO with alternatively configurable functions.
See section

1.13

for functional description.

See section

2.8

for external circuit design-in.

GPIO5

I/O Cellular GPIO

1.8 V GPIO with alternatively configurable functions.
See section

1.13

for functional description.

See section

2.8

for external circuit design-in.

GNSS
PIOs

TIMEPULSE

GNSS time pulse

LENA-R8001M10 only. GNSS time pulse output function.
See section

1.18

for functional description.

See section

2.12

for external circuit design-in.

Internally not connected on LENA-R8001.

EXTINT

GNSS external
interrupt

LENA-R8001M10 only. GNSS external interrupt function.
See section

1.18

for functional description.

See section

2.12

for external circuit design-in.

Internally not connected on LENA-R8001.

Cellular
Antenna
tuning

RFCTRL1

Cellular dynamic
antenna tuner
control output

Function not supported by current product versions.
See section

1.8.3

for functional description.

See section

2.4.6

for external circuit design-in.

RFCTRL2

Cellular dynamic
antenna tuner
control output

Function not supported by current product versions.
See section

1.8.3

for functional description.

See section

2.4.6

for external circuit design-in.

Reserved RSVD

21, 49, 62

N/A RESERVED pin

Pin reserved for future use. Internally not connected.
See sections

1.14

a nd

2.9

Table 3: LENA-R8 series modules pin definition, grouped by function

1.5

Operating modes

1.5.1

Overview

LENA-R8 series modules include 2 variants: the LENA-R8001 modules, integrating a cellular system,
and the LENA-R8001M10 modules, integrating the same cellular system of LENA-R8001 modules
plus a GNSS system based on the ultra-low-power u-blox M10 GNSS receiver.

As illustrated in

Figure 2

, the cellullar and the GNSS are completely independent subsystems of the

LENA-R8001M10 modules, internally interconnected by dedicated I2C interface, with separate
supply inputs and separate accessible interfaces for great usage flexibility, as each of the two
subsystems can be operated fully independently.