Datasheet

NEO-6 - Data Sheet
GPS.G6-HW-09005-E Page 16 of 25
3.4 SPI timing diagrams
In order to avoid a faulty usage of the SPI, the user needs to comply with certain timing conditions. The
following signals need to be considered for timing constraints:
Symbol
Description
SS_N
Slave Select signal
SCK
Slave Clock signal
Table 12: Symbol description
Figure 3: SPI timing diagram
3.4.1 Timing recommendations
Parameter
Description
Recommendation
t
INIT
Initialization Time
500 s
t
DES
Deselect Time
1 ms
Bitrate
100 kbit/s
Table 13: SPI timing recommendations
The values in the above table result from the requirement of an error-free transmission. By allowing just
a few errors, the byte rate could be increased considerably. These timings – and therefore the byte rate
– could also be improved by disabling other interfaces, e.g. the UART.
The maximum bandwidth is 100 kbit/s
21
.
21
This is a theoretical maximum, the protocol overhead is not considered.