EVK-M8GZOE User Guide
UBX-16030132 - R04
Device description
Page 12 of 30
Early Production Information
UART
The UART RX and TX of ZOE-M8G are available on the digital connector J1 with 1.8 V levels, see
section 4.4 for more information. The UART communication speed is by default set to 9600 baud.
Speeds up to 460,800 baud can are supported by ZOE-M8 modules.
SPI
The SPI interface pins are available on digital connector J1, see section 4.4 for more information.
☞
If using SPI interface, the slide switch has to be set accordingly.
DDC (I
²
C)
The digital connector J1 contains pins for evaluating DDC (I
²
C) bus communication. For such
evaluation the interface switch must be in correct position: RS-232 / USB.
Additional pull-ups on DDC lines to 1.8 V can be installed on the EVK-M8GZOE if needed, see R4 and
R6 in Figure 10.
4.3
GNSS signal inputs
The EVK-M8GZOE has two RF inputs for GNSS signals. Purpose is to have optimal performance for
“no gain” and for “high gain” use cases. It means basically for passive antenna designs and active
antenna designs.
Figure 2: GNSS signal inputs
