IGEP
TM
RADAR SENSOR ORION Hardware Reference Manual
ISEE 2007
S.L. All rights reserved, IGEP™ is a registered trademark from ISEE 2007 S.L. The following is provided for informational purposes only.
DOCUMENT FROM ISEE 2007 S.L. Ref: MAN-PR-RADR0010-RA1-001
18
5.8
CONTROL PORTS
There three input ports (active high) used to control the radar board: switch among different IF
amplifiers and filters or start DDS modulation.
CTRL
: This is a Radar Board INPUT. The activation of this pin will give the possibility to start
DDS modulation sweep (with the previously programmed scheme through SPI interface)
when ADC CS is activated by the first time (first sample read). This will let a perfect
synchronization between modulation start and IF signal sampling.
CTL1
: This is a Radar Board INPUT that switches the IF signal to a Narrow Band Pass Filter.
CTL2
: This is a Radar Board INPUT. This pin switches to a Doppler Filter on the IF section.
When EXPANSION-II (JC2 CONNECTOR) is used, the CONTROL ports are:
Signal Name
Mode 0 Name
Pin #
Description
2CTRL
mcbsp3_dx
JC2:4
DDS CONTROL SIGNAL (mode4: gpio_140) IN
2CTL1
mcbsp3_dr
JC2:10
CONTROL IF NW (mode4: gpio_141) IN
2CTL2
mcbsp1_fsr
JC2:22
CONTROL DOPPLER (mode4: gpio_157) IN
Table 13 : CONTROL PORTS INTERFACE on JC2 connector
When EXPANSION-III (JC3 CONNECTOR) is used, the CONTROL ports are:
Signal Name
Mode 0 Name
Pin #
Description
3CTRL
uart2_cts
JC3:18
DDS CONTROL SIGNAL (mode4: gpio_144) IN
3CTL1
dss_data4
JC3:7
CONTROL IF NW (mode4: gpio_74) IN
3CTL2
dss_data7
JC3:29
CONTROL DOPPLER (mode4: gpio_77) IN
Table 14 : CONTROL PORTS INTERFACE on JC3 connector
The next table shows the combination of control ports to activate each of the IF filters:
Signal Name
STD FILTER
NW FILTER
DOPPLER FILTER
xCTL1
0
1
0
xCTL2
0
0
1
Table 15 : CONTROL PORTS and FILTER ACTIVATION
