Freescale Semiconductor, Inc... Freescale Semiconductor, Inc. Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board Designer Reference Manual M68HC08 Microcontrollers DRM045/D Rev. 0 9/2003 MOTOROLA.COM/SEMICONDUCTORS For More Information On This Product, Go to: www.freescale.
Freescale Semiconductor, Inc... Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.
Freescale Semiconductor, Inc. Freescale Semiconductor, Inc... Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board Reference Design By: Bill Lucas Motorola Transportation and Standard Products Group Austin, TX To provide the most up-to-date information, the revision of our documents on the World Wide Web will be the most current. Your printed copy may be an earlier revision. To verify you have the latest information available, refer to: http://motorola.
Freescale Semiconductor, Inc. Revision History Revision History Revision Level September, 2003 N/A Description Initial release Page Number(s) N/A Freescale Semiconductor, Inc... Date DRM045 4 Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board Revision History For More Information On This Product, Go to: www.freescale.
Freescale Semiconductor, Inc. Designer Reference Manual — DRM045 Table of Contents Section 1. Introduction and Setup Freescale Semiconductor, Inc... 1.1 1.2 1.3 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Setup Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Section 2. Operational Description 2.
Freescale Semiconductor, Inc. Freescale Semiconductor, Inc... Table of Contents DRM045 6 Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board Table of Contents For More Information On This Product, Go to: www.freescale.
Freescale Semiconductor, Inc. Designer Reference Manual — DRM045 Section 1. Introduction and Setup Freescale Semiconductor, Inc... 1.1 Introduction Motorola’s ASB520, MC68HC908QT2 Infrared Remote Control Reference PC Board and software are designed to demonstrate how a simple, limited function, dedicated remote control system could be designed. The objective is to keep the design simple so a user can pick portions of interest to his design and turn them into an application specific system.
Freescale Semiconductor, Inc. Freescale Semiconductor, Inc... Introduction and Setup Figure 1-1. MC68HC908QT2 IR Reference PC Board Photograph 1.3 Setup Guide Setup for the reference design PC board can be broken into two parts. • The first is normal user operation mode. • The second is MC68HC908QT2 FLASH programming configuration. FLASH programming is explained in Section 6. System Testing.
Freescale Semiconductor, Inc. Introduction and Setup Setup Guide For user operation mode, shorting jumpers need to be installed to jumper blocks JP1–JP4. Shorting jumper block JP1 is not necessary if the small PC board trace under jumper block JP1, on the bottom side of the PC board, has not been cut for microcontroller current monitoring. Freescale Semiconductor, Inc... Installation of 3-AA Alkaline batteries into the battery holder mounted on the bottom of the PC board is also required for setup.
Freescale Semiconductor, Inc. Freescale Semiconductor, Inc... Introduction and Setup DRM045 10 Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board Introduction and Setup For More Information On This Product, Go to: www.freescale.
Freescale Semiconductor, Inc. Designer Reference Manual — DRM045 Section 2. Operational Description Freescale Semiconductor, Inc... 2.1 Introduction The following subsections describe the operation of the ASB520, MC68HC908QT2 infrared remote control reference design system. LEDs, switches, jumper blocks and FLASH programmer headers, and current monitor jumper block are described here. Figure 2-1 shows the locations of these items. 2.
Freescale Semiconductor, Inc. Operational Description JP1 Freescale Semiconductor, Inc... JP2 JP3 J1 JP4 Figure 2-1. PC Board DRM045 12 Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board Operational Description For More Information On This Product, Go to: www.freescale.
Freescale Semiconductor, Inc. Operational Description Header and Jumpers Blocks 2.4 Header and Jumpers Blocks There is one 16-pin header (2 x 8-pin), J1, and four 2-pin jumper blocks, JP1–JP4, on the PC board. See Figure 2-1 for their locations on the PC board. Freescale Semiconductor, Inc... The header and jumper functions are described as follows. J1: Jumper block J1 is used to program the MC68HC908QT2, located in the center of the PC board.
Freescale Semiconductor, Inc. Operational Description 2.5 Microcontroller Current Monitor Jumper Block Freescale Semiconductor, Inc... Jumper block JP1 is intended as a connection on the PC board to measure the stop current of the MC68HC908QT2. To use the feature, you must cut the small PC board trace located on the bottom side of the PC board between the two pins of the jumper block. After cutting the trace, and when not using an amp meter to measure system current a shunt must be installed on JP1.
Freescale Semiconductor, Inc. Designer Reference Manual — DRM045 Section 3. Pin Description Freescale Semiconductor, Inc... 3.1 Introduction There is one connector resident on the control board, labeled J1. It is the MON08 connector. The following subsection describes signals on connector J1. 3.2 16-Pin Connector J1 Signals to and from the MON08 connector are grouped together on 16-pin (2 x 8-pin) ribbon cable connector J1. Pin assignments for connector J1 are shown in Table 3-1.
Freescale Semiconductor, Inc. Freescale Semiconductor, Inc... Pin Description DRM045 16 Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board Pin Description For More Information On This Product, Go to: www.freescale.
Freescale Semiconductor, Inc. Designer Reference Manual — DRM045 Section 4. Schematic and Parts List 4.1 Introduction Freescale Semiconductor, Inc... Schematic and parts list detail are documented in this section. 4.2 Schematic A schematic of the reference design PC board appears in Figure 4-1. Unless otherwise specified, capacitor values are in microfarads, resistor values are in ohms.
2 - BATTERY BAT1 + 1 2 JP1 1 PTA5 Idd_TEST 1 Vdd 2 Vbat For More Information On This Product, Go to: www.freescale.com Schematic and Parts List 1 3 5 7 9 11 13 15 2 4 6 8 10 12 14 16 2 4 6 8 10 12 14 16 + JP2 MON08 CONNECTOR 1 3 5 7 9 11 13 15 J1 470uF C1 CAP_DISC 10 R7 2 2 1 1 Vdd PTA4 10M 16MHz 47K R8 X1 4 3 U1 Vdd SW4 REV SW5 STOP SW6 FWD SW3 PLAY SW2 PAUSE SW1 POWER R9 3.3K SW_DISC JP3 Vss R13 220 R14 470 R15 1k R12 2.2k R11 4.
Freescale Semiconductor, Inc. Schematic and Parts List Parts List 4.3 Parts List The following parts list describes the parts content for the IR reference PC board. Table 4-1. Reference PC Board Parts List Freescale Semiconductor, Inc... Designators Qty. Description Manufacturer Part Number BAT1 1 3-AA Battery Holder Digi-Key 2464K-ND C1 1 470 µF Cap@6.3WV Digi-Key P5508-ND C2 1 0.
Freescale Semiconductor, Inc. Freescale Semiconductor, Inc... Schematic and Parts List DRM045 20 Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board Schematic and Parts List For More Information On This Product, Go to: www.freescale.
Freescale Semiconductor, Inc. Designer Reference Manual — DRM045 Section 5. Design Considerations Freescale Semiconductor, Inc... 5.1 Introduction Microcontroller systems, in general, have a number of important design considerations related to PC board layout and grounding considerations. These design considerations are discussed in 5.2 Grounding, 5.3 Infrared and Visible LED Drive Circuit, and 5.4 Switch Circuitry. A description of two of the reference board’s major circuits are included in 5.
Freescale Semiconductor, Inc. Design Considerations A logic 1 from port A, bit 0 will turn the NPN transistor on, driving its collector low. The low level applied to the base of the PNP transistor, Q2, will drive its emitter to collector into conduction, illuminating the two LEDs. Resistor R5 is in place to guarantee that Q1 is biased off during initial power on and before the microcontroller’s program has configured port A, bit 1 to behave as a digital output. 5.
Freescale Semiconductor, Inc. Design Considerations Switch Circuitry The spreadsheet in Table 5-1 gives the decimal values seen by the A/D, based on which switch is depressed. Because the voltage from the switches is ratiometric to VDD, power supply variation will have no effect on A/D readings. Table 5-1. Switch Input A/D Values Switch Ideal Value Minus 6% Plus 6% 255 239.7 255 Power 170.5 160.3 180.7 Play 127.7 120 153.3 Forward 79.9 75.1 84.7 Reverse 40.8 38.4 43.3 Pause 14.
Freescale Semiconductor, Inc. Freescale Semiconductor, Inc... Design Considerations DRM045 24 Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board Design Considerations For More Information On This Product, Go to: www.freescale.
Freescale Semiconductor, Inc. Designer Reference Manual — DRM045 Section 6. System Testing Freescale Semiconductor, Inc... 6.1 Introduction This section will first explain how to program the control program into FLASH memory of the MC68HC908QT2 microcontroller. It will then, in detail, provide functional testing of both hardware and user software for the ASB520 infrared remote control reference design. 6.
Freescale Semiconductor, Inc. System Testing 6.4 LED and Push Button Test Code Freescale Semiconductor, Inc... Test code is embedded in the ASB520 control program. This test code will test the switches, LED drive circuitry and visible LED, D2. The infrared led, D1, is illuminated, but you can’t see it. To run the test program, follow the next 12 steps: 1. Connect a jumper lead between pins 2 and 6 on connector J1. 2. Install shorting jumpers on jumper blocks JP1–JP4 3.
Freescale Semiconductor, Inc. System Testing DVD Player Control Test 6.5 DVD Player Control Test To test the infrared diode and the rest of the system in user mode, install a music CD in the APEX model 1201 DVD player. Music CDs appear to respond faster than video CD’s in this CD player. Freescale Semiconductor, Inc... To test the software, infrared diode and the rest of the ASM520 PC board, follow these steps: 1.
Freescale Semiconductor, Inc. System Testing Freescale Semiconductor, Inc... 15. Point the ASB520 board with LED D1 toward the DVD player and depress the REVERSE switch on the ASB520 PC board. The music will back-up, at a high rate, until it reaches the beginning of the song, at which time it will restart the song. 16. Point the ASB520 board with LED D1 toward the DVD player and depress the FORWARD switch on the ASB520 PC board. The music will play very fast. 17.
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Freescale Semiconductor, Inc. HOW TO REACH US: USA/EUROPE/LOCATIONS NOT LISTED: Motorola Literature Distribution P.O. Box 5405 Denver, Colorado 80217 1-800-521-6274 or 480-768-2130 Freescale Semiconductor, Inc... JAPAN: Motorola Japan Ltd. SPS, Technical Information Center 3-20-1, Minami-Azabu, Minato-ku Tokyo 106-8573, Japan 81-3-3440-3569 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd. Silicon Harbour Centre 2 Dai King Street Tai Po Industrial Estate Tai Po, N.T.
