12V Adapter Board
Overview
Hardware adapter board providing voltage-level shifting for digital and analog outputs as well as additional analog inputs for the PROTOS miniHIL:
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21 analog input channels accepting 12V signals
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16 analog output level shifter channels 3.3V → 12V
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24 digital input channels compatible with both 5V → 3.3V and 12V → 3.3V logic signals
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20 digital output channels, 12V
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4 digital I/O channels, bidirectional - 5V, suitable for I2C
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8 digital unidirectional inputs 5V - 3.3V, 8 digital unidirectional ouptuts 3.3V - 5V, suitable for SPI/UART/…
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1 channel LIN bus interface
Software Support
Only the analog inputs on the adapter board require additional software on the miniHIL side. All other IOs are simply levelshifted and can be connected via wire jumpers between miniHIL and adapter board.
Driver actor for 12V ADC inputs
The adapter board is supported by the following miniHIL model library actor: AGeneric12VAdapterADCInterface (minihil.platform.extensions.Generic12VAdapter).
The actor is controlled through the PGeneric12VAdapterControl protocol. The separate inputs are exposed via PADCIn ports named adcChN (where N is the channel number).
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The actor must be started before the adc channel ports can be used by sending a start12VAdapterADC() message to the actors ctrl port. |
| |
You must connect the SPI connections stated in the Analog Inputs section to use the ADC functionality of the adapter board. |
Connector Interface
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Plugs into the PROTOS miniHIL board via dual 2×36 pin connectors (CN11 / CN12).
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External 12 V-side I/O exposed through dual-row 2×12 connectors.
Connectors:
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J3 = miniHIL left connector (CN11, 72 pins)
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J4 = miniHIL right connector (CN22, 72 pins)
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J2 = 5 V special functions (2×12)
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J5 = Analog output connector (2×12)
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J6 = Digital output connector (2×12)
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J7 = Digital input connector (2×12)
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J8 = Analog input connector (2×12)
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J9 = Co-processor connector (3.3V only!)
Important: To supply the adapter with 24V directly form the miniHIL board, SB50 on the miniHIL board must be closed (open by default). In addition the 5V supply jumper next to CN11 must be closed using a jumper or jumper wire. If the board is powered correctly the 3 power LEDs above J3 are on.
Analog Inputs — 21 channels
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21 analog input channels accepting 12 V-range signals.
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Resistive voltage-divider conditioning scales the 12 V range down to the G4 MCUs ADC input range.
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Dedicated onboard microcontroller (STM32 G4) digitizes all channels via internal ADC.
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The co-processor reports measurements to the miniHIL over an SPI link.
| |
The following wires are needed for the SPI miniHIL connection: |
| Signal | miniHIL Connector | Target 1+2 Connector |
|---|---|---|
MISO |
PG12 |
PD14 |
MOSI |
PG14 |
PF14 |
SCK |
PG13 |
PD15 |
NSS |
PG8 |
PF13 |
Analog Outputs — 16 channels
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16 analog level shifter channels 3.3V → 12V.
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Op-amp buffers scale 3.3 V DAC signals from the miniHIL up to the 12 V range.
| Ch | J5 Pin | miniHIL target connector |
|---|---|---|
0 |
1 |
PC0 |
1 |
2 |
PC1 |
2 |
3 |
PC2 |
3 |
4 |
PC3 |
4 |
5 |
PC4 |
5 |
6 |
PC5 |
6 |
7 |
PC6 |
7 |
8 |
PC7 |
8 |
9 |
PC8 |
9 |
10 |
PC9 |
10 |
11 |
PC10 |
11 |
12 |
PC11 |
12 |
13 |
PC12 |
13 |
14 |
PC13 |
14 |
15 |
PC14 |
15 |
16 |
PC15 |
Digital Inputs — 24 channels
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24 digital input channels compatible with both 5 V and 12 V logic signals (min. 5 V, max. 12 V).
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Series resistors limit input current; Schmitt-trigger buffers provide switching and noise rejection.
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Level-shifted outputs at 3.3 V feed the miniHIL directly.
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Maximum translated input frequency ~200kHz@12V
| Ch | J7 Pin | miniHIL target connector |
|---|---|---|
0 |
1 |
PA0 |
1 |
2 |
PA1 |
2 |
3 |
PA2 |
3 |
4 |
PA3 |
4 |
5 |
PA4 |
5 |
6 |
PA5 |
6 |
7 |
PA6 |
7 |
8 |
PA7 |
8 |
9 |
PA8 |
9 |
10 |
PA9 |
10 |
11 |
PA10 |
11 |
12 |
PA11 |
12 |
13 |
PA12 |
13 |
14 |
PA13 |
14 |
15 |
PA14 |
15 |
16 |
PA15 |
16 |
17 |
PB0 |
17 |
18 |
PB1 |
18 |
19 |
PB2 |
19 |
20 |
PB3 |
20 |
21 |
PB4 |
21 |
22 |
PB5 |
22 |
23 |
PB6 |
23 |
24 |
PB7 |
Digital Outputs — 20 channels
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20 digital output channels (channels 0–19).
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MOSFET driver arrays driven from 3.3 V signals supplied by the miniHIL.
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Maximum output frequency ~200kHz@12V
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Output voltage configurable between 12 V and 5 V via solder jumper (12V default). |
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The output drivers are not individually short circuit protected, but the power supply limits the current and switches into pulse mode for auto recovery once the short is removed. A prolonged short circuit situation may damage the corresponding output pin driver. |
| Ch | J6 Pin | miniHIL target connector |
|---|---|---|
0 |
1 |
PD0 |
1 |
2 |
PD1 |
2 |
3 |
PD2 |
3 |
4 |
PD3 |
4 |
5 |
PD4 |
5 |
6 |
PD5 |
6 |
7 |
PD6 |
7 |
8 |
PD7 |
8 |
9 |
PD8 |
9 |
10 |
PD9 |
10 |
11 |
PD10 |
11 |
12 |
PD11 |
12 |
13 |
PD12 |
13 |
14 |
PD13 |
14 |
15 |
PB14 |
15 |
16 |
PB13 |
16 |
17 |
PB12 |
17 |
18 |
PB11 |
18 |
19 |
PB10 |
19 |
20 |
PB9 |
Special-Function Level Shifting (J2)
The adapter board contains additional IOs for 3.3V <→ 5V level shifting. These may be used as needed. The unidirectional IOs are optimized for propagation delay and may be used for synchronous and asynchronous digital data busses. Bidirectional IOs are commonly used for I2C.
Digital I/O (4 channels, bidirectional — suitable for I2C)
| J2 Pin | miniHIL target connector |
|---|---|
16 |
PH0 |
18 |
PH1 |
20 |
PH2 |
22 |
PH3 |
Unidirectional I/O (8 channels per direction - suitable for SPI/UART/…):
| J2 Pin | miniHIL target connector | Direction |
|---|---|---|
1 |
PG0 |
miniHIL → DUT |
2 |
PG4 |
DUT → miniHIL |
3 |
PG1 |
miniHIL → DUT |
4 |
PG5 |
DUT → miniHIL |
5 |
PG2 |
miniHIL → DUT |
6 |
PG6 |
DUT → miniHIL |
7 |
PG3 |
miniHIL → DUT |
8 |
PG7 |
DUT → miniHIL |
9 |
PG8 |
miniHIL → DUT |
10 |
PG12 |
DUT → miniHIL |
11 |
PG9 |
miniHIL → DUT |
12 |
PG13 |
DUT → miniHIL |
13 |
PG10 |
miniHIL → DUT |
14 |
PG14 |
DUT → miniHIL |
15 |
PG11 |
miniHIL → DUT |
LIN Bus Interface — 1 channel
Single LIN bus transceiver providing a physical LIN bus line (12V) with RX and TX translation for the miniHIL MCU.
| Signal | miniHIL target connector | J6 pin | Direction |
|---|---|---|---|
MH_LIN_TX |
PF0 |
— |
miniHIL → Bus |
MH_LIN_RX |
PG15 |
— |
Bus → miniHIL |
LIN_BUS |
— |
J6 pin 22 |
Physical bus |
Power Supply
| Rail | Source |
|---|---|
Supply input (13–36 V) |
Taken from the miniHIL if SB50 is closed (nominally 24 V) |
12 V |
Buck converter step-down from supply input |
5 V |
Buck converter step-down from 12 V |
3.3 V |
LDO from 5 V |
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Power-on status LED.
Pin quick reference (sorted by miniHIL target connector)
| miniHIL target connector | Function | Adapter Connector | Adapter Connector Pin |
|---|---|---|---|
PA0 |
DigIn_0 |
J7 |
1 |
PA1 |
DigIn_1 |
J7 |
2 |
PA2 |
DigIn_2 |
J7 |
3 |
PA3 |
DigIn_3 |
J7 |
4 |
PA4 |
DigIn_4 |
J7 |
5 |
PA5 |
DigIn_5 |
J7 |
6 |
PA6 |
DigIn_6 |
J7 |
7 |
PA7 |
DigIn_7 |
J7 |
8 |
PA8 |
DigIn_8 |
J7 |
9 |
PA9 |
DigIn_9 |
J7 |
10 |
PA10 |
DigIn_10 |
J7 |
11 |
PA11 |
DigIn_11 |
J7 |
12 |
PA12 |
DigIn_12 |
J7 |
13 |
PA13 |
DigIn_13 |
J7 |
14 |
PA14 |
DigIn_14 |
J7 |
15 |
PA15 |
DigIn_15 |
J7 |
16 |
PB0 |
DigIn_16 |
J7 |
17 |
PB1 |
DigIn_17 |
J7 |
18 |
PB2 |
DigIn_18 |
J7 |
19 |
PB3 |
DigIn_19 |
J7 |
20 |
PB4 |
DigIn_20 |
J7 |
21 |
PB5 |
DigIn_21 |
J7 |
22 |
PB6 |
DigIn_22 |
J7 |
23 |
PB7 |
DigIn_23 |
J7 |
24 |
PB9 |
DigOut_19 |
J6 |
20 |
PB10 |
DigOut_18 |
J6 |
19 |
PB11 |
DigOut_17 |
J6 |
18 |
PB12 |
DigOut_16 |
J6 |
17 |
PB13 |
DigOut_15 |
J6 |
16 |
PB14 |
DigOut_14 |
J6 |
15 |
PC0 |
AnOut_0 |
J5 |
1 |
PC1 |
AnOut_1 |
J5 |
2 |
PC2 |
AnOut_2 |
J5 |
3 |
PC3 |
AnOut_3 |
J5 |
4 |
PC4 |
AnOut_4 |
J5 |
5 |
PC5 |
AnOut_5 |
J5 |
6 |
PC6 |
AnOut_6 |
J5 |
7 |
PC7 |
AnOut_7 |
J5 |
8 |
PC8 |
AnOut_8 |
J5 |
9 |
PC9 |
AnOut_9 |
J5 |
10 |
PC10 |
AnOut_10 |
J5 |
11 |
PC11 |
AnOut_11 |
J5 |
12 |
PC12 |
AnOut_12 |
J5 |
13 |
PC13 |
AnOut_13 |
J5 |
14 |
PC14 |
AnOut_14 |
J5 |
15 |
PC15 |
AnOut_15 |
J5 |
16 |
PD0 |
DigOut_0 |
J6 |
1 |
PD1 |
DigOut_1 |
J6 |
2 |
PD2 |
DigOut_2 |
J6 |
3 |
PD3 |
DigOut_3 |
J6 |
4 |
PD4 |
DigOut_4 |
J6 |
5 |
PD5 |
DigOut_5 |
J6 |
6 |
PD6 |
DigOut_6 |
J6 |
7 |
PD7 |
DigOut_7 |
J6 |
8 |
PD8 |
DigOut_8 |
J6 |
9 |
PD9 |
DigOut_9 |
J6 |
10 |
PD10 |
DigOut_10 |
J6 |
11 |
PD11 |
DigOut_11 |
J6 |
12 |
PD12 |
DigOut_12 |
J6 |
13 |
PD13 |
DigOut_13 |
J6 |
14 |
PD14 |
SPI3_MISO |
J9 (co-proc) |
— |
PD15 |
SPI3_SCK |
J9 (co-proc) |
— |
PF0 |
MH_LIN_TX |
J6 |
22 (LIN_BUS) |
PF13 |
SPI3_NSS |
J9 (co-proc) |
— |
PF14 |
SPI3_MOSI |
J9 (co-proc) |
— |
PG0 |
SPI_MHOut_0 |
J2 |
1 |
PG1 |
SPI_MHOut_1 |
J2 |
3 |
PG2 |
SPI_MHOut_2 |
J2 |
5 |
PG3 |
SPI_MHOut_3 |
J2 |
7 |
PG4 |
SPI_MHIn_0 |
J2 |
2 |
PG5 |
SPI_MHIn_1 |
J2 |
4 |
PG6 |
SPI_MHIn_2 |
J2 |
6 |
PG7 |
SPI_MHIn_3 |
J2 |
8 |
PG8 |
UART_MHOut_0 |
J2 |
9 |
PG9 |
UART_MHOut_1 |
J2 |
11 |
PG10 |
UART_MHOut_2 |
J2 |
13 |
PG11 |
UART_MHOut_3 |
J2 |
15 |
PG12 |
UART_MHIn_0 |
J2 |
10 |
PG13 |
UART_MHIn_1 |
J2 |
12 |
PG14 |
UART_MHIn_2 |
J2 |
14 |
PG15 |
MH_LIN_RX |
J6 |
22 (LIN_BUS) |
PH0 |
DigIO_0 |
J2 |
16 |
PH1 |
DigIO_1 |
J2 |
18 |
PH2 |
DigIO_2 |
J2 |
20 |
PH3 |
DigIO_3 |
J2 |
22 |
