28-PIN LIN DEMO BOARD USER’S GUIDE © 2009 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
28-PIN LIN DEMO BOARD USER’S GUIDE Table of Contents Chapter 1. 28-Pin LIN Demo Board Overview 1.1 Introduction ..................................................................................................... 4 1.2 Highlights ........................................................................................................ 4 1.3 28-Pin LIN Demo Board Supported Devices .................................................. 4 1.4 28-Pin LIN Demo Board Overview ..........................................
28-PIN LIN DEMO BOARD USER’S GUIDE Chapter 1. 28-Pin LIN Demo Board Overview 1.1 INTRODUCTION The 28-Pin LIN Demo Board is a small and simple demonstration PCB for Microchip’s 28-pin Dual Inline Package (DIP) PIC® Microcontroller Units (MCU). It is populated with a PIC16F886 MCU, a MCP2021 LIN Transceiver with voltage regulator, four LEDs, 2 push buttons and a potentiometer. The demo board has several test points to access the I/O pins of the MCU and a generous prototyping area.
28-Pin LIN Demo Board Overview 1.4 28-PIN LIN DEMO BOARD OVERVIEW The 28-Pin LIN Demo Board is populated with a PIC16F886 MCU (U1), a MCP2021 LIN Transceiver with Voltage Regulator (U2), four LEDs (DS1-DS4), Two push buttons (SW1 and SW2), 32 KHz crystal (X2) and potentiometer (RP1). The board layout is shown in Figure 1-1. The demo board has several test points to access the I/O pins of the MCU and a generous prototyping area.
28-Pin LIN Demo Board User’s Guide Data byte 2 = (bit 5 = SW1, bit 4 = SW2, bit 3:0 LEDS Data byte 3 = 0 (not used) Data byte 4 = 0 (not used) DSxxxxx-page 6 © 2009 Microchip Technology Inc.
28-PIN LIN DEMO BOARD USER’S GUIDE Appendix A. Hardware Schematics A.1 INTRODUCTION This appendix contains the 28-Pin LIN Demo Board schematic and Bill of Materials. © 2009 Microchip Technology Inc.
A B C D P3 1 2 3 1 6 2 7 3 8 4 9 5 1 22pF DB9-F P4 C4 Cext 0.1uF Rext 10K In-Circuit-Program-Debug VCC 5 TP4 20MHz X1 VCC 1N4750 27V 1 2 3 4 5 6 P1 D3 1 JP6 1 R1 10K SW1 RP1 10K RB0/AN12//INT RB1/AN10/P1C/C12IN3RA7/OSC1/CLKIN RB2/AN8/P1B RB3/AN9/PGM/C12IN2RB4/AN11/P1D RB5/AN13/T1G RA6/OSC2/CLKOUT RB6/ICSPCLK RB7/ICSPDAT C2 0.1uF RE3/MCLR/Vpp 2 1K 21 22 23 24 25 26 27 28 R14 10K SW2 3 1N4004 10uF C8 + 4 R15 1 1K 2 1 VCC C7 10uF TP1 D1 1N4148WX JP7 .
Hardware Schematics A.1.2 Bill of Materials Bill of Materials Designation C1, C2 Qty 2 Description Capacitor, Ceramic, 0.1 µF, 5%, X7R C5, C6 2 Capacitor, Ceramic, 22 pF, 50V, C0G C7, C8 2 Capacitor, Tantalum, 10µF, 5%, 35V C9 1 Capacitor, Ceramic, 0.
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