User Manual

3-2

V2.0

Application Kit TC3X7 V2.0

2018-06

Application Kit Manual TC3X7

Hardware: Application Kit TC3X7 V2.0

Application Kit Information

3.2.2

Power via Micro USB (BU301)

The Board can also be powered by the Micro USB connector. The power consumption of the board is higher than

500mA. Use an USB port which can deliver 900mA (USB 3.0). Most USB hubs are not able to drive more than

100mA and can’t be used.

Also it is possible to power the board with a cellular battery charger which has 5V output and use Micro USB for

connecting.

The pinout for the USB connector is shown in Figure 6-3.

3.2.3

Multi Voltage Safety Micro Processor Supply TLF35584QV

The board has assembled the Safety Micro Processor Supply with the following Features:

– High efficient multi voltage power supply chip

– Serial step up and step down pre regulator for wide input voltage range from 3.0 to 40 V with full

performance and low over all power loss

– Low drop post regulator 5.0V/200mA for communication supply (named LDO_Com)

– Low drop post regulator 3.3 V/600 mA (VS2) or 5.0V/600mA (VS1) for μC supply (named LDO_μC)

– Provides enable, sync out signal and voltage monitoring (inside device to be added to reset function) for an

optional external post regulator for core supply (not used)

– Voltage reference 5.0 V +/- 1% for ADC supply, 150 mA current capability (named Volt_Ref)

– Two trackers for sensor supply following voltage reference 150 mA current capability each (named Tracker

1 and Tracker 2, not used)

– Standby regulator 3.3 V/10 mA (VS2) or 5.0 V/10 mA (VS1) (named LDO_Stby)

– Independent voltage monitoring block with reset function

– Configurable functional and window watchdog

–16-bit SPI

– Safe state control with two safe state signals with programmable delay

– Input voltage monitoring (over voltage switch off)

– Green Product (RoHS compliant)

– ISO26262 compliant

–AEC Qualified

The TLF35584 is connected to the CPU via QSPI2 and use QSPI2_SLSO1 (P14.2) as chip select. Via this spi

connection the power supply will be configured (Watchdog, device states and soon).

For more information see the data sheet of TLF35584.

Note:

The switch to FAILSAFE state is switched off by HW (R127 assembled). If you will use/evaluate all safety

features of the TLF35584 make sure that R127 is not assembled and remove R127 if assembled. Make

sure that you have a proper initialization of TLF35584 in your software and debugger in this case. If

needed you can assemble JP201 (2 pin header). Then you can switch easily with a jumper.

3.3

Real Time Clock

The board is equipped with a RTC MCP79511 (if I2C is not supported by CPU) or MCP79411 (if I2C is supported by

CPU) from Microchip. The device is powered from the standby voltage of the TLF35584 and is also powered when

the TLF35584 is switched to standby mode. For backup when the TLF35584 is not powered then there is a small

battery to hold the value inside the RTC. The MCP79511 is connected to the microcontroller via QSPI4, the

MCP79411 is connected to the microcontroller via I2C on P15.4/P15.5. The RTC can trigger an SCU_REQ4 (P33.7)

interrupt (activ low) with the alarms. Also an alarm from the RTC will wake-up (switch on) the board if the board

is powered and the supply is switched off.