GPS Receiver A1030-A
Figure 9: 1PPS signal description
Signal delay d (typical)
130ns
Standard deviation
σ
d
(typical)
20ns
Signal duration l (typical)
500ms
Table 12: 1PPS signal characterization with active antenna with filter at 22°C
Signal delay d (typical)
90ns
Standard deviation
σ
d
(typical)
20ns
Signal duration l (typical)
500ms
Table 13: 1PPS signal characterization with passive antenna at 22°C
The standard deviation is a probability measure for the occurrence of value within a
certain range. 68.3% of all new values will be within 1
σ
of the expected value,
95.5% within 2
σ
.
12.8 Reset Signal
The nRST pin is an input pin.
The nRST pin can be used to generate a reset on the A1029 modules. Resetting
the module will result in a restart of the complete firmware including the boot loader.
All information stored in flash memory will still be valid. The RTC will keep on run-
ning. The same result can be achieved using the ENABLE pin. Therefore connect-
ing nRST is not necessary.
In case of low power mode (ENABLE pin low) DO NOT pull nRST to low. This will
result in additional current draw.
V2.0 - 07/05
User’s Manual
Page 29 of 37
