ZOE-M8B - System Integration Manual
UBX-17045131 - R04
Contents
Page 23 of 42
Production Information
2.9
Typical Schematic
Figure 17: Typical schematic for ZOE-M8B
2.10
Migration from ZOE-M8G to ZOE-M8B
The ZOE-M8B GNSS SiP is optimized for low power use – for example in portable and wrist worn
applications – and features Super-E mode and data batching, which are not available in the ZOE-M8G.
In addition, the ZOE-M8B supports all essential u-blox M8 features, including message integrity
protection, anti-jamming and anti-spoofing, integrated odometer, geo-fencing, and optional data
logging. Optimization for low-power operation introduces differences in the ZOE-M8B feature set that
need to be considered for migration from ZOE-M8G to ZOE-M8B.
The ZOE-M8B is pin and feature compatible with ZOE-M8G with minor differences. Designs based on
ZOE-M8G can be migrated to ZOE-M8B with minimum or even no changes, provided the following
differences are considered:
•
At start-up, the ZOE-M8B defaults to Super-E mode whereas ZOE-M8G defaults to continuous
mode.
•
Galileo operation is supported only in Continuous mode. Galileo should be disabled in Super-E
mode.
•
Time pulse is not supported in ZOE-M8B.
•
In ZOE-M8B, time mark is supported only in Continuous mode and in acquisition phase of Super-E
mode. It is not supported in the low power tracking phase of Super-E mode.
•
Communication interfaces such as SPI and I
²
C have limited maximum communication speed in
ZOE-M8B. The I
2
C bus speed is limited to up to 100 kbit/s (i.e., the fast mode is not supported).
The SPI bus speed is limited to up to 1 Mbits/s
•
Maximum navigation rate in Super-E mode is 4 Hz, and the longest supported fix interval is 10 s.
•
Only host-controlled on/off operation is supported in ZOE-M8B. Managed on/off operation, i.e.
power save mode with long intervals, is not supported.
•
In Super-E mode , the integrated LNA is automatically duty-cycled in order to save power. With the
external LNA control LNA_EN, an optional external LNA can also be automatically duty-cycled.
