Chapter 1 Overview
1.3General Description
The
It can be used as a
1.3.1 MCU Clocks
The board is supplied with a socketed 4 MHz crystal as main oscillation source. Using the internal PLL of the IC, internal clock rates up to 56 MHz can be achieved.
1.3.2 RS-232 and LIN
Two separate RS232 transceivers and two
All transceivers are fully 3.3V IO compatible to enable low voltage applications.
1.3.3 CAN Bus
Two
All transceivers are fully 3.3V IO compatible to enable low voltage applications.
1.3.4 MCU Pins
All pins of the microcontroller except the oscillator pins X0/X1 and X0A/X1A are connected to edge connectors and are directly available to the user.
1.3.5 Power Supply
The
1.3.6 User Buttons
There are six push button switches on the board, which can be connected to input ports of the microcontroller. This allows the user to evaluate external Interrupts, external timer trigger or Input Capture functions as well as simple input polling. One button is reserved as ‘Reset’- button for the microcontroller, controlled by the supply monitor IC.
1.3.7 User LEDs and optional LCD
Eight user LEDs are connected to Port 09 and grounded by two 1k resistor networks (RN1, RN2). If these LEDs are not required, these resistor networks can be removed to disconnect the LEDs and to free the I/O port.
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