Detailed description

The board features the following key sections, as shown in Figure 1.

HIL Analog connector
HIL Digital connector
HSEC 180 card connector
Power supply
CAN bus connector
JTAG connector

HIL Analog I/O

Up to 24 analog outputs (AOs), and up to 3 analog inputs (AIs), are routed from the DIN41612 socket (HIL side) to the HSEC 180 connector (DSP side).

To protect against overvoltage conditions, HIL analog outputs feature series 120 Ω RZ1-RZ24 resistors that, together with TI controlCARD ADC protection diodes (U6-U11), act as a 0-3.3 V clamping circuit.

Table 1. Analog signal routing
HIL Analog Output	DSP signal
AO1/AI1*	ADC–A0/DAC-A
AO2/AI2*	ADC–A1/DAC-B
AO3	ADC–A2
AO4	ADC–A3
AO5	ADC–A4
AO6	ADC–A5
AO7	ADC–14
AO8	ADC–15
AO9	ADC–B0
AO10/AI3*	ADC-B1/DAC-C
AO11	ADC–B2
AO12	ADC–B3
AO13	ADC–B4
AO14	ADC–B5
AO15	ADC–D0
AO16	ADC–D1
AO17	ADC-C2
AO18	ADC-C3
AO19	ADC-C4
AO20	ADC-C5
AO21	ADC-D2
AO22	ADC-D3
AO23	ADC-D4
AO24	ADC-D5

* Depending on the position of the R25, R26, or R27 jumpers, this HIL AO or HIL AI may be routed to the DSP analog pin. By default, HIL AOs are routed to the DSP ADC.

HIL Digital I/O

Up to 16 digital outputs, and 24 digital inputs, are routed to the GPIO ports of the corresponding controlCARD.

Table 2. HIL Digital Output signal routing
HIL Digital Output signal	DSP Digital Input signal
DO1	GPIO-54/QEP-2A
DO2	GPIO-55/QEP-2B
DO3	GPIO-56/QEP-2S
DO4	GPIO-57/QEP-2I
DO5	GPIO-50
DO6	GPIO-51
DO7	GPIO-52
DO8	GPIO-53
DO9	GPIO-35
DO10	GPIO-36
DO11	GPIO-37
DO12	GPIO-38
DO13	GPIO-60
DO14	GPIO-61
DO15	GPIO-62
DO16	GPIO-63

Table 3. Digital signal routing
HIL Digital Input signal	DSP Digital Input signal
DI1	GPIO-00/PWM-1A
DI2	GPIO-02/PWM-2A
DI3	GPIO-04/PWM-3A
DI4	GPIO-06/PWM-4A
DI5	GPIO-08/PWM-5A
DI6	GPIO-10/PWM-6A
DI7	GPIO-01/PWM-1B
DI8	GPIO-03/PWM-2B
DI9	GPIO-05/PWM-3B
DI10	GPIO-07/PWM-4B
DI11	GPIO-09/PWM-5B
DI12	GPIO-11/PWM-6B
DI13	GPIO-14/PWM-8A
DI14	GPIO-12/PWM-7A
DI15	GPIO-15/PWM-8B
DI16	GPIO-13/PWM-7B
DI17	GPIO-34
DI18	GPIO-39
DI19	GPIO-40
DI20	GPIO-41
DI21	GPIO-44
DI22	GPIO-45
DI23	GPIO-48
DI24	GPIO-49

HSEC 180 Connector

The HSEC 180 connector is a standardized connector for Texas Instruments 180 pin controlCARD modules. The following controlCARD modules are supported without any modifications:

Power Supply

The DSP 180 Interface is powered by a 5 V rail, supplied directly from HIL User PSU section, or from the onboard 5 V buck regulator (powered externally from a 12 V DC power supply).

For use cases when the controlCARD is used separately from the HIL, in a standalone configuration, it is possible to configure the HIL DSP 180 Interface Board to be powered from an external power source, via an onboard selector switch. This turns the HIL DSP180 Interface Board into a generic controlCARD development board.

When this selector switch, labeled DSP PWR, is in the "HIL" position, the 5 V rail of TI controlCARD is supplied directly from the HIL 5 V rail. In this mode, no external adapter is required.

When the selector switch is set to "EXT", the board is powered from an external 12 V DC power supply, with the following indicator LED status indicators:

PGOOD (ON when rail is lower than 5 V or output current higher than 1 A)
PWR (ON when 5 V rail is present)

CAN bus

The controlCARD DSP’s CAN-A module (GPIO-30/CANRX-A and GPIO-31/CANTX-A) is connected to the onboard CAN transceiver, SN65HVD232D from Texas Instruments, which forms the 3.3 V CAN bus as shown on the Figure 2.

The CAN bus is accessible over the RJ45 connector and it is terminated with two 120 Ω resistors. If the external 3.3 V CAN bus is connected to the HIL DSP 180 Interface CAN bus, care must be taken to remove the redundant terminating resistors on both buses. On the DSP 180 Interface, this is done by removing the RSC2 (0 Ω) resistor.

JTAG

The JTAG section consists of the JTAG header, with a pinout shown on the Figure 3.

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