AMY-6M - Hardware Integration Manual
UBX-17021971 – R07
Design-in
Page 24 of 57
2.5
System Configuration
2.5.1
Configuration at start-up
At start-up, the configuration of the system is performed in two steps: First the so-called Low Level
Configuration is applied, and then the Functional Configuration is carried out. In between those two steps, the
non-volatile memories are detected. See Figure 19 for an overview.
D e te c tio n o f m e m o r ie s
S Y S T E M R U N N IN G
F u n c tio n a l C o n fig u r a tio n
L o w L e v e l C o n fig u r a tio n
S T AR T O F S Y S T E M
Figure 19: Configuration at start-up
2.5.1.1
Low Level Configuration
The Low Level Configuration provides some basic configuration information such as GPS mode or reference
clock frequency. This information can be supplied in different ways. However, not all of them are available in
every setup. The options are:
ROM Defaults: Default settings of the integrated ROM Code. See
AMY-6M Data Sheet
CFG Pins: The settings of CFG_COM0/MOSI and CFG_COM1/MISO during boot sequence.
Figure 20: Low level configuration sequence
