2002-12-12
Page 16 of 20
Evalkit User Manual
5. APPENDICES
5.1 Description of GPIO leds
The standard iTRAX02 firmware uses the GPIO for debug purposes,
see the following table (the led is active when the GPIO is at low
state).
LED MEANING
TASK
WHEN
0 Calculating
pseudo-ranges
MsgTask
Low
1
Calculating new fix
NavTask
Low
2
Valid fix available
NavTask
Low
3
System error (Msg pool full)
any
Low
4 New
subframe
data
Data_io
Toggle
5
New track data
Track_io
Toggle
6
New acquisition data
Acq_io
Toggle
7 iTRAX02
running
Control
Toggle
8
Serial data to transmit
ISR
Low
9
Serial data received
ISR
Low
10
Serial data buffer overflow
ISR
Low
11
Wake-up from sleep mode
Main
Input
12
Flash device busy
-
Low
13
RF Amplifier on
Main
Low
14
Boot mode select (UART/SPI)
-
Input
15
Boot mode select (Flash/Serial)
-
Input