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
15
Figure 8: SPI Master clock timing
t1>20ns; t4>25ns;
5.6.3
DDS CONTROL REGISTER PROGRAMMING:
First hexadecimal word to be transmitted through SPI link:
ABCD EFGH IJKL MNOP [bin] ---> GHIJ [hexa]
ABCD
: 0000
(CONTROL REGISTER ADDRESS)
E
=1 → A complete word is loaded into a freq. register in two consecutive writes
F
=0
→
Deactivation of DAC (not used)
G
=1
→
DAC wave is sinusoidal (not used)
H
=1
→
MSB activated
I
=1
→
Continuous mode (0 → “burst” mode)
J
=0 → burst controlled internally (not used)
K
=0
→
Frequency increments triggered internally (1 → triggered by CTRL pin)
L
=0
→
Triangular frequency modulation sweep (1 → saw sweep)
M
=1
→
SYNC pin is activated at the end of sweep (0 → pulse at each freq. increment)
N
=1
→
SYNC enabled
O
=1 reserved (not used)
P
=1 reserved (not used)
Translation from binary to hexadecimal: 0000 1011 1000 1111 → 0B8F
FIRST WORD=
GHIJ
(Factory default value: 0B8F)
