A-Cute
User Manual
18
September 12, 2016
Figure 3-6 Connections between the GPIO, A/D Converter and 1x10 Header
To save power, the 1x10 header with an LED power switch control signals in pin.9, we can turn off
the switch when the IR LED is not in use. The signal name is IR_LED_ON and high active.
lists the pin assignment of SPI interface connected to the DE0-Nano GPIO0, Include Sensor
Module power control signal.
Table 3-4 Pin assignment of ADC 4-Wire SPI interface and Power control
SCD Signal Name
GPIO
Pin No.
FPGA Pin No.
on GPIO 0
Description
I/O Standard
ADC_CONVST
11
PIN_A5
Right Motor Negative signal.
OUT, 3.3V
ADC_SCK
12
PIN_D5
Right Motor Positive signal.
OUT, 3.3V
ADC_SDO
13
PIN_B6
Left Motor Positive signal.
IN, 3.3V
ADC_SDI
14
PIN_A6
Left Motor Negative signal.
OUT, 3.3V
IR_LED_ON
39
PIN_D12
IR LED Power Control signal.
Logic high to turn on IR LED power.
OUT, 3.3V