User's Manual

HBR-DS-18002: Hiberband modem product datasheet
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Same world, different angle.
Page 8
3 Typical application ciruit
A typical interface between the application host processor, generally a microcontroller, and the Hiberband
modem is shown in Figure 5.
Figure 5: Typical integration of a Hiberband modem with an application host processor
In the example design shown above, the host application processor runs at 3.0V, while the Hiberband modem has
a +3.3V supply voltage. The processor interfaces with the Hiberband modem through a UART interface for serial
device-to-device communication. Optionally, the debug UART may be used in the application. Furthermore, two
GPIO pins (configured as outputs) are used to drive the RESET and WKUP inputs of the Hiberband modem, both
of which have active HIGH levels. The signal levels of the processor-modem UART interfaces is set by applying
the appropriate voltage to the VREF input of the Hiberband modem. Other than ensuring that the power supply
is able to deliver the necessary current within a sufficiently fast transient response time, this covers the
integration of Hiber’s LPGAN connectivity in an IoT device.
The host application processor must provide the actual geo-location of the device. Since the active version of the
Hiberband modem does not have the internal GPS receiver anymore, non-stationary IoT devices must provide
other means for determining its current position.
4 Hiberband modem design support
Hiber is strongly committed to providing good support to its partners. In addition to documentation, Hiber offers
CAD libraries, reference schematics and board layout footprints, that can be obtained upon request. Please
contact us at [e-mail] for any assistance you may need.
5 Product ordering information
Please find the product ordering information in the table below.
Orderable device Status Description
HBR-18MDM001-001 End of life Hiberband modem with internal GPS receiver
HBR-18MDM001-002 Mass production Hiberband modem
Table 12: Hiberband modem product ordering codes
VREF
WKUP
SYS_TXD
SYS_RXD
RESET
TXD
RXD
GPIO
GPIO
VCC
+3.0V
VCC
+3.3V
host application
processor
DBG_TXD
DBG_RXD
Hiberband modem
optional