Hardware Reference
ThinkRF R5750 Real-Time Signal Analyzer User Guide
39
GPIO Port Pinout
The GPIO (General Purpose Input/Output) port supports extended hardware capability
including SPI (Serial Peripheral Interface) bus, I2C serial interface, PPS (Pulse Per
Second) input, external triggering input/output and specific radio front end control and
status.
Caution
: Improper use of the GPIO may cause irreparable damage to the R5750. Do not
use the GPIO without prior consultation with ThinkRF's service organization.
The following pinouts are specific to the R5750 models only.
Pin
Direction
Voltage
Signal
1-2, 5-8, 10-13
not applicable
3.3 V
Reserved
3
out
3.3 V
TRIG OUT
4
in
3.3 V
TRIG IN
14
in
3.3 V
PPS
16
out
3.3 V
Spectral Inversion
17-20
bidirectional
3.3 V
EXT IO D[3:0], respectively
23-25
power
12 V
VCC12V
9, 15, 21, 22
ground
0 V
GND
Note:
The functionality of the EXT IN/OUT/IO pins is application-specific and thus could
vary. Refer to ThinkRF's Application Notes or contact ThinkRF support for more
information.