KIT33905 Evaluation Boards
, Rev. 2.0
4
Freescale Semiconductor
Introduction
3
Introduction
This evaluation board allows the user to implement the functionality of the MC33905 product System
Basis Chip (SBC).
This EVB includes two I/O test points that can be configured to be pulled up to V
SUP
, or pulled down to
GND through a resistor and indicator LED. These are easily configured via jumper settings. The SBC can
also be exercised in debug mode (watchdog re-fresh/monitoring not needed) by simply populating a
jumper. Separating the input supply voltage to VSUP1 and VSUP2 is also made simple with a jumper
configuration. Specified resistor pull-downs can be implemented on DBG and MUX pins via simple jumper
configurations. The status of I/O0, I/O1, VAUX, 5V_CAN, SAFE, and VDD can be visually monitored via
on-board LEDs. The CAN and LIN Bus signals are provided through terminal block connectors.
An isolated terminal block connector is implemented to provide power to the evaluation board with an
external DC power supply.
The evaluation board is operated through the graphical user interface paired up with the SPI dongle board
(KITUSBSPIDGLEVME) through the 2x8 pin ribbon cable. Additionally, for added flexibility, the user can
implement a custom board with a microcontroller to talk to the SBC via the 16 pin header.
3.1
EVB Features
•
Nominal operating supply voltage range of 5.5 V to 27 V
•
Individually routed power supply inputs for VSUP1 and VSUP2
•
5.0/3.3 V regulator for MCU with an external PNP ballast transistor to increase current capability
•
Multiple CAN Bus termination options supported via socket
•
Two high/low side I/Os (SPI configurable) accessible through test points
•
Status of I/O0 and I/O1 indicated by an LED (dependent on jumper configuration)
•
Debug mode/watchdog configuration via jumper settings
•
MUX output voltage accessible through a test point and external resistor selectable through jumper
•
3.3 V or 5.0 V output voltage test point VAUX (SPI configurable)
•
I_WAKE_I test point to enable a FET and load VDD with current to wake-up the SBC
•
LIN1_T and LIN2_T test points to monitor I/O voltages (SPI configurable)
•
I/O0, I/O1, VAUX, 5V_CAN, SAFE, and VDD status indicated by LED
•
100 mil 2x8 pin standard header connector for SPI communication
•
100 mil 16 pin standard header connector for custom MCU board connections