SIB header

The SIB header is a 3 rows and 32 pins header that connect the SIB to the MIB.

Reference Parts

	SIB Header	MIB Connector
DigiKey Part Number	2684-254897-E-ND	1195-5214-ND
Manufacturer	TE Connectivity ERN	HARTING
Product Number	254897-E	09731962903
Description	CONN DIN RCPT 96POS	CONN DIN HDR 96POS

Header pinout

The SIB header pinout is defined as below:

	A	B	C
1	GND	GND	GND
2	+12V_SW	+12V_SW	+12V_SW
3	GND	GND	GND
4	+12V_SW	+12V_SW	+12V_SW
5	GND	GND	GND
6	+5V_SW	+5V_SW	+5V_SW
7	GND	GND	GND
8	+5V_SW	+5V_SW	+5V_SW
9	GND	GND	GND
10	+3V3_SW	+3V3_SW	+3V3_SW
11	GND	GND	GND
12	+1V8_SW	+1V8_SW	+1V8_SW
13	+12V	+3V3	+1V8
14	GND	GND	GND
15	DUT_OPTO_4C	+5V	I2C_SIB_3V3_SCL
16	DUT_OPTO_3C	GND	I2C_SIB_3V3_SDA
17	DUT_OPTO_2C	MIB_VIO	DUT_OPTO_2E
18	DUT_OPTO_1C	GND	DUT_OPTO_1E
19	DUT_RST	DDT_CS	I2C_MIB_VIO_SCL
20	DUT_PWR	DDT_SCK	I2C_MIB_VIO_SDA
21	GND	DDT_MISO	GND
22	DDT_GPIO_9	DDT_MOSI	SIB_UART1_CTS
23	DDT_GPIO_8	GND	SIB_UART1_RTS
24	DDT_GPIO_7	SIB_USB_H2_DM	SIB_UART1_TX
25	DDT_GPIO_6	SIB_USB_H2_DP	SIB_UART1_RX
26	GND	GND	GND
27	DDT_GPIO_5	SIB_USB_H1_DM	SIB_UART3_TX
28	DDT_GPIO_4	SIB_USB_H1_DP	SIB_UART3_RX
29	DDT_GPIO_3	GND	GND
30	DDT_GPIO_2	DDT_CAN_L	SIB_UART4_TX
31	DDT_GPIO_1	DDT_CAN_H	SIB_UART4_RX
32	GND	GND	GND

Header orientation

When using hardware design tools, the model for the SIB header is labeled the over way around!

Software usage

CAN

The CAN bus is available as can0 network interface. Use any CAN aware tools like can-utils to interact on the bus.

GPIOs

Two gpios are available to toggle buttons. They can be controlled with:

laam laacli button reset on
laam laacli button reset off

The available GPIOs are:

• DUT_RST: reset button

• DUT_PWR: power button

I²C

The header provides 2 I²C:

• I2C_SIB_3V3_SCL and I2C_SIB_3V3_SDA at 3v3

• I2C_MIB_VIO_SCL and I2C_MIB_VIO_SDA at MIB_VIO reference voltage (from 0V to 5V).

Optocouplers

Two optocouplers are available to toggle on and off virtual buttons. The buttons can be controlled with:

laam laacli button 1 on
laam laacli button 1 off

The available optocouplers are:

• DUT_OPTO_1C and DUT_OPTO_1E: virtual button 1

• DUT_OPTO_2C and DUT_OPTO_2E: virtual button 2

Unused pins

DUT_OPTO_3C and DUT_OPTO_4C are not used.

Power rails

The power pins, flagged with _SW, are managed power rails that can be controlled by laam:

laam laacli power 12v on
laam laacli power 12v off
laam laacli power 12v reset

The header provides 4 power rails: 1v8, 3v3, 5v and 12v.

Delivered power

The power rail maximum power are listed in this table:

Power rail	Max Amp (A)	Max Power (W)
1v8	1A	1.8W
3v3	2A	6.6W
5v	3A	15W
12v	3A	36W

Over Current Protecting

As mentioned in the table above, the LAA should not deliver more than 3A.

The LAA runs a software (soft) and hardware (hard) Over Current Protecting (OCP) mechanism to protect the LAA and the attached DUT if the DUT draw more power than expected.

If soft OCP is triggered, the power rails will be shutdown and a message will be printed on every telnet and ssh sessions.

If hard OCP is triggered, the LAA will be shutdown immediately.

The soft OCP should be triggered faster than the hard OCP but under some circumstances, the hard OCP might be triggered anyway.

Power rails power

The instant power consumption of each power rail is monitored and can be queried by laam:

laam laacli watt 12v
laam laacli watt 3v3

Serials

The header provides 3 set of serials:

• SIB_UART1 as /dev/ttycmx0: DUT serial with hardware flow control

• SIB_UART3 as /dev/ttycmx2: LAA serial

• SIB_UART4 as /dev/ttycmx3: DUT serial

SIB_UART4 is also available via telnet: SIB_UART4 is also available via laam or telnet:

laam serials connect ttymxc3
telnet localhost 2000

SPI

The header provides one SPI: DDT_CS, DDT_SCK, DDT_MISO and DDT_MISO.

USBs

The header provide 2 USB ports that are always on at:

• SIB_USB_H1_DM and SIB_USB_H1_DP

• SIB_USB_H2_DM and SIB_USB_H2_DP