Page 1
PCM-5820 Series (PCM-5820/5820L/5820E/5822) NS GXM Single Board Computer with CPU SVGA/LCD, Ethernet, Audio and TV-out Interface...
Page 2
Acknowledgements AMD is a trademark of Advanced Micro Devices, Inc. Award is a trademark of Award Software International, Inc. IBM, PC/AT, PS/2 and VGA are trademarks of International Business Machines Corporation. Intel and Pentium are trademarks of Intel Corporation. ®...
Packing list Before you begin installing your card, please make sure that the following materials have been shipped: • 1 PCM-5820 Series all-in-one single board computer • 1 startup manual • 1 utility disk/CD, driver, and manual (in PDF format) •...
Contents CHAPTER 1 General Information ....... 1 Introduction ..............2 Features ................. 3 Specifications ..............4 1.3.1 Standard SBC functions ........4 1.3.2 Local-bus flat panel/VGA interface ...... 5 1.3.3 LVDS (Low Voltage Differential Signal) interface (PCM-5820, PCM-5820L, PCM-5820E) ....... 5 1.3.4 Audio function ............
Page 5
Floppy drive connector (CN2) ........20 2.9.1 Connecting the floppy drive........ 20 2.10 Parallel port connector (CN3) ........21 2.11 Keyboard and PS/2 mouse connector (CN17) ..22 2.12 Power connectors ............22 2.12.1 Main power connector +5 V, +12 V (CN9) ..22 2.12.2 Auxilary power connector (CN10) ....
Page 6
Chapter 3 Software Configuration ......31 Introduction ..............32 Utility CD disk ............32 VGA display software configuration ......33 Connections for two standard LCDs ......35 3.4.1 Connections for Toshiba LTM10C042 (640 x 480 TFT color LCD) ........ 35 3.4.2 Connections for Toshiba LTM12C275A (800 x 600 TFT color LCD)........
Page 7
5.2.2 Installation for Cyrix MediaGX Certified drivers for Windows 95/980. Insert the disk into the CD-ROM drive................57 5.2.3 Installation for Windows NT ......61 Chapter 6 Audio............67 Introduction ..............68 Installation of audio driver ........68 6.2.1 Installation for Windows 95/98 ......69 6.2.2 Installation for Windows NT ......
Page 8
CD audio connector (CN1) ..........91 LVDS connector (CN15) ............91 CPU fan power connector (CN6) ........91 S-Video connector (CN21) ........... 92 RCA (composite) connector (CN22) ........92 ATX power feature connector (CN23) ....... 93 ATX power button & power LED connector (CN24) ..93 Appendix B System Assignments ......
Page 9
Tables Table 2-1: Jumpers ............... 10 Table 2-2: Connectors ..............11 Table 2-3: Audio power source setting ........23 Table 2-4: COM2 selection (J4) ........... 24 Table 2-5: Serial port default settings .......... 24 Table 2-6: LCD power setting ............26 Table 2-7: Ethernet power select ..........
General Information This chapter gives background informa- tion on the PCM-5820 Series. Sections include: • Board specifications • Board layout and dimensions...
Introduction The PCM-5820 Series is the ultimate cost-effective solution for limited space applications. It offers all the functions of an AT-compatible industrial computer on a single board and only occupies the space of a 3½" hard drive. The PCM-5820/5820L comes with an embedded high-performance GXM-233 processor on-board.
Features • Ultra-compact size single board computer as small as a 3 1/2" hard disk drive (145 mm x 102 mm) • On-board NS GXM-233/200 CPU • Up to 128 MB system memory by SODIMM (SDRAM) • On-board VGA/LCD controller •...
1.3.6 Mechanical and environmental • Dimensions (L x W): 145 mm x 102 mm (5.9" x 4.2") • Power supply voltage: +5 V (4.75 ~ 5.25 V) • Power consumption (typical) : - +5 V @ 3.0 A with GXM-233, 64 MB SODIMM and 40 MB CFC (PCM-5820) - +5 V @ 1.9 A with GXM-233, 64 MB SODIMM and 40 MB CFC (PCM-5820 Rev.
Installation This chapter tells how to set up the PCM-5820 Series hardware, including instructions on setting jumpers and connecting peripherals, switches and indicators. Be sure to read all the safety precautions before you begin the installa- tion procedure.
Jumpers and connectors Connectors on the board link it to external devices such as hard disk drives, a keyboard or expansion bus connectors. In addition, the board has a number of jumpers that allow you to configure your system to suit your application. The table below lists the function of each of the board jumpers and connectors: Table 2-1: Jumpers...
Table 2-2: Connectors Label Function CD audio input connector Floppy disk connector Parallel port connector USB connector Audio connector CPU fan power connnector (+5 V) IR connector (infrared) PC/104 connector Main power connector (+5 V, +12 V) CN10 Auxilary power connector (-5 V, -12 V) CN11 IDE Hard disk connector CN12...
Setting jumpers 2.4.1 Introduction You may configure your card to match the needs of your applica- tion by setting jumpers. A jumper is the simplest kind of electrical switch. It consists of two metal pins and a small metal clip (often protected by a plastic cover) that slides over the pins to connect them.
Safety precautions Warning! Always completely disconnect the power cord from your board whenever you are working on it. Do not make connections while the power is on because sensitive electronic components can be damaged by the sudden rush of power. Caution! Always ground yourself to remove any static charge before touching the board.
Installing DRAM (SODIMMs) 2.6.1 Introduction You can install anywhere from 16 MB to 128 MB of on-board DRAM memory using 16, 32, 64 or 128 MB 144-pin SODIMMs (Small Outline Dual In-line Memory Modules). 2.6.2 Installing SODIMMs Note: The modules can only fit into a socket one way and their gold pins must point down into the SODIMM socket.
IDE hard drive connector (CN11) The built-in Enhanced IDE (Integrated Device Electronics) controller supports up to two IDE devices, including CD-ROM drives, tape backup drives, a large hard disk drive and other IDE devices. It also supports faster data transfer, PIO mode 3, mode 4, and Ultra DMA 33 mode.
CompactFlash™ disk (CN19) The PCM-5820 Series is equipped with a CompactFlash disk socket on the solder side and it supports the IDE interface Com- pactFlash disk card. The socket itself is especially designed to prevent any incorrect installation of the CompactFlash disk card. When installing or removing the CompactFlash disk card, please make sure that the system power is off.
When connecting a 3½” floppy drive, you may have some difficulties in determining which pin is pin number one. Look for a number on the circuit board indicating pin number one. In addi- tion, you should check if the connector on the floppy drive has an extra slot.
2.11 Keyboard and PS/2 mouse connector (CN17) The PCM-5820 Series board provides a mini-DIN keyboard connector, which supports both a keyboard and a PS/2 style mouse. In most cases, especially in embedded applications, a keyboard is not used. If the keyboard is not present, the standard PC/AT BIOS will report an error or failure during the power-on self test (POST) after resetting the PC.
2.14 Audio interfaces (CN5, CN1) The PCM-5820 Series is equipped with a high quality audio interface, which provides 16-bit CD quality recording and play- back as well as OPL3 compatible FM music. It is supported by all major operating systems and is completely compatible with Sound Blaster Pro.
Configuration of the audio interface is done completely via software utilities.You don't have to set any jumpers. For furhter information, please refer to Chapter 6 for audio setup details. 2.15 Serial ports (CN16, CN14) The PCM-5820 Series offers two serial ports: one RS-232 and one RS-232/422/485.
2.16 VGA interface connections The PCM-5820 Series board's SVGA interface can facilitates conventional CRT displays as well as active LCD displays. The card has two connectors to support these displays, one for standard CRT VGA monitors and one for flat panel displays. 2.16.1 CRT display connector (CN18) CN18 is a 15-pin, D-SUB connector commonly used for conven- tional CRT displays.
2.16.3 LCD power setting (J6) The PCM-5820 Series' PCI SVGA interface supports 5 V and 3.3 V LCD displays. By changing the setting of J6, you can select the panel video signal level to be 5 V or 3.3 V. Table 2-6: LCD power setting *5 V 3.3 V...
2.18 Ethernet interface connections The PCM-5820 Series is equipped with a high performance 32-bit PCI Ethernet interface which is fully compliant with IEEE 802.3u 10/100 Mbps CSMA/CD standards. 2.18.1 100Base-T RJ-45 connector (CN13) 100Base-T connections are made via the on-board RJ-45 connec- tor.
2.19 Ethernet LED and HDD/power LEDs 2.19.1 LED1 (Ethernet LED) Table 2-8: Ethernet LED setup Setting Green lamp Yellow lamp Link The LED should be set so that when the cable is connected, the yellow lamp is activated; and when data is transmitted, the green lamp is activated.
2.20.1 Watchdog timer action (J3) When the watchdog timer activates (CPU processing has come to a halt), it can reset the system or generate an interrupt on IRQ11. This can be set via J3 as shown below: Table 2-10: Watchdog timer action *System reset IRQ11 * default setting...
2.23 ATX power control conn. (CN23, CN24) The PCM-5820 Series offers two serial ports: one RS-232 and one RS-232/422/485. These ports allow you to connect to any serial device (a mouse, printers, etc.) or communication network. 2.23.1 ATX feature connector (CN23) and power button (CN 24)) The PCM-5822 can support an advanced power button if an ATX power supply is used.
Software Configuration This chapter details the software configu- ration information. It shows you how to configure the card to match your applica- tion requirements. Award system BIOS is covered in Chapter 4. Sections include: • LCD display configuration • Connections for two standard LCDs...
Introduction The PCM-5820 Series system BIOS and custom drivers are located in a 256 KB, 32-pin Flash ROM device, designated U14. A single Flash chip holds the system BIOS and VGA BIOS. The display type can be configured via software. This method minimizes the number of chips and eases configuration.
VGA display software configuration The PCM-5820 Series on-board VGA/LCD interface supports an 18-bit TFT LCD, flat panel displays and traditional analog CRT monitors. The interface can drive CRT displays with resolutions up to 1024 x 768 in 16 bpp. It is also capable of driving color panel displays with resolutions of 1024 x 768 in 18 bpp.
Page 44
3. At the prompt, type in the BIN file which supports your display. When you are sure that you have entered the file name correctly press <Enter>. The screen will ask “Do you want to save?” If you wish to continue press Y. If you change your mind or have made a mistake press N.
Connections for two standard LCDs 3.4.1 Connections for Toshiba LTM10C042 (640 x 480 TFT color LCD) Table 3-1: Connections for Toshiba LTM10C042 LTM10C042 PCM-5820 Series CN12 Name Name SHFCLK PD12 PD13 PD14 PD15 PD16 PD17 PD10 PD11 ENAB +5 V +5 V Chapter 3 Software Configuration...
3.4.2 Connections for Toshiba LTM12C275A (800 x 600 TFT color LCD) Table 3-2: Connections for Toshiba LTM12C275A LTM12C275A PCM-5820 Series CN12 Name Name NCLK SHFCLK PD12 PD13 PD14 PD15 PD16 PD17 PD10 PD11 ENAB M/DE +5 V +5 V PCM-5820 Series User's Manual...
Ethernet interface configuration The PCM-5820 Series' on-board Ethernet interface supports all major network operating systems. To configure the medium type, to view the current configuration, or to run diagnostics, do the following: 1. Power the PCM-5820 Series on. Make sure that the RSET8139.EXE file is located in the working drive.
System test and initialization These routines test and initialize board hardware. If the routines encounter an error during the tests, you will either hear a few short beeps or see an error message on the screen. There are two kinds of errors: fatal and non-fatal.
Award BIOS setup Award’s BIOS ROM has a built-in Setup program that allows users to modify the basic system configuration. This type of information is stored in battery-backed CMOS RAM so that it retains the Setup information when the power is turned off. 4.2.1 Entering setup Power on the computer and press <Del>...
4.2.2 Standard CMOS setup When you choose the STANDARD CMOS SETUP option from the INITIAL SETUP SCREEN menu, the screen shown below is dis- played. This standard Setup Menu allows users to configure system components such as date, time, hard disk drive, floppy drive and display.
4.2.3 BIOS features setup By choosing the BIOS FEATURES SETUP option from the INITIAL SETUP SCREEN menu, the screen below is displayed. This sample screen contains the manufacturer’s default values for the PCM-5820 Series. Figure 4-3: BIOS features setup Chapter 4 Award BIOS Setup...
4.2.4 Chipset features setup By choosing the CHIPSET FEATURES SETUP option from the INITIAL SETUP SCREEN menu, the screen below is displayed. This sample screen contains the manufacturer’s default values for the PCM-5820 Series. Figure 4-4: Chipset features setup PCM-5820 Series User's Manual...
4.2.5 Power management setup By choosing the POWER MANAGEMENT SETUP option from the INITIAL SETUP SCREEN menu, the screen below is displayed. This sample screen contains the manufacturer’s default values for the PCM- 5820 Series. Figure 4-5: Power management setup Chapter 4 Award BIOS Setup...
4.2.6 PnP/PCI configuration By choosing the PnP/PCI CONFIGURATION option from the Initial Setup Screen menu, the screen below is displayed. This sample screen contains the manufacturer’s default values for the PCM-5820 Series. Figure 4-6: PnP/PCI configuration PCM-5820 Series User's Manual...
4.2.7 Integrated peripherals By choosing the INTEGRATED PERIPHERALS option from the INITIAL SETUP SCREEN menu, the screen below is displayed. This sample screen contains the manufacturer’s default values for the PCM-5820 Series. The PANEL TYPE by default supports a 18-bit 640 x 480 TFT LCD panel display.
4.2.8 Load BIOS defaults LOAD BIOS DEFAULTS loads the default system values directly from ROM. If the stored record created by the Setup program be- comes corrupted (and therefore unusable), these defaults will load automatically when you turn the PCM-5820 Series on. Confirm Password: Figure 4-8: Load BIOS defaults screen PCM-5820 Series User's Manual...
4.2.9 Change password To change the password, choose the PASSWORD SETTING option form the Setup main menu and press <Enter>. 1. If the CMOS is bad or this option has never been used, a default password is stored in the ROM. The screen will display the following messages: Enter Password: Press <Enter>.
4.2.10 Auto detect hard disk The IDE HDD AUTO DETECTION utility can automatically detect the IDE hard disk installed in your system. You can use it to self- detect and/or correct the hard disk type configuration. ROM ISA BIOS CMOS SETUP UTILITY AWARD SOFTWARE, INC.
Introduction The PCM-5820 Series has an on-board LCD/VGA interface. The specifications and features are described as follows: 5.1.1 Chipset The PCM-5820 Series uses a Cyrix CX5530 chipset for its SVGA controller. It supports many popular 18-bit LCD displays and conven- tional analog CRT monitors.
Installation of SVGA driver Complete the following steps to install the SVGA driver. Follow the procedures in the flow chart that apply to the operating system that you are using within your PCM-5820 Series. Important: The following windows illustrations are examples only.
5.2.1 Installation for Windows 3.1 1. In the Windows 3.1 Main screen, click on the "Windows Setup" icon. 2. In the "Windows Setup" window, choose "Options", then select "Change System Settings". PCM-5820 Series User's Manual...
Page 65
3. In the "Change System Settings" window, select the "Display" item. In the dropdown selection, select "Other display (Requires disk from OEM)". 4. Type in the correct path like the window below, where drive "D" is the CD ROM drive. For example, D:\ Biscuit\ 5820 \ VGA.100 \ Win31 Chapter 5 SVGA Setup...
Page 66
5. Select the display type and preferred resolution, then click "OK". 6. Choose "Restart Windows" PCM-5820 Series User's Manual...
5.2.2 Installation for Cyrix MediaGX Certified drivers for Windows 95/980. Insert the disk into the CD-ROM drive. 1. Select "Start" then "Run". Type the correct path for the driver (like the example below) "D:\BISCUIT\5820\VGA\Win9xc_40" Click "OK" Chapter 5 SVGA Setup...
Page 68
2. Click "Finish" to continue. 3. Click "Next" to proceed to the next step. Click "Yes" after you read the license agreement. PCM-5820 Series User's Manual...
Page 69
4. Follow the instructions which appear on the screen. 5. Insert the Win95/ 98 CD-ROM into the CD-ROM drive. Type the correct path for the Win9 x source file. Chapter 5 SVGA Setup...
Page 70
6. Choose "Yes", then click "Finish" to restart the computer. PCM-5820 Series User's Manual...
5.2.3 Installation for Windows NT 1. a. Select "Start", "Settings" then "Control Panel" to get to the screen below. b. Double click on the "Display" icon. 2. a. Choose the "Settings" selection. b. Click the "Display Type" button. Chapter 5 SVGA Setup...
Page 72
3. Press the "Change..." button. 4. Click on the "Have Disk..." button PCM-5820 Series User's Manual...
Page 73
5. a. Insert the disk into the CD-ROM drive. b. Type "D:\Biscuit\5820\VGA\WINNT\VGA.110\" c. Press "OK". 6. a. Select the highlighted item. b. Press "OK". Chapter 5 SVGA Setup...
Page 74
7. Press "Yes" to proceed. 8. Press "OK" to reboot. PCM-5820 Series User's Manual...
Page 75
9. a. Repeat Step 1 in this manual, select the "Settings" label. b. Adjust the resolution and color. c. Click "Test" to see the results. d. Click "OK" to save the settings. Chapter 5 SVGA Setup...
Introduction The PCM-5820 Series' on-board audio interface provides high-quality stereo sound and FM music synthesis (ESFM) by using the CX5530 audio controller from Cyrix Corporation. The audio interface can record, compress, and play back voice, sound, and music with a built- in mixer control.
6.2.1 Installation for Windows 95/98 a. Select "Start", "Settings", "Control Panel", "System", "Device Manager". b. Click the "Other Devices" item. c. Remove items related to ESS 1869. CX 5530. a. Select "Add new hardware". b. Click "Next". a. Choose "No", click "Next".
Page 80
a. Click "Have Disk". a. Insert the disc into the CD-ROM drive. b. Type the correct path "D:\5820\VGA\Win9X\ Audio" and click the D:\5820\VGA.100\Win9X\Audio\ click the "OK" button. a. Select "ES1869 Control interface". a. Click "Finish" to complete. PCM-5820 Series User's Manual...
Page 81
a. Click "OK". a. Insert Windows 95 b. Type the path of your Windows 95 disc and click "OK". D:\5820\VGA.100\Win9X\Audio a. Click "Yes" to restart. E N D Chapter 6 Audio...
6.2.2 Installation for Windows NT a. Select "Start", "Settings", "Control Panel". b. Double click "Multimedia". a. Select the "Devices" item. b. Click "Add". a. Select the "Unlisted..." item. b. Click "OK". a. Insert the disc into the CD-ROM drive. Type "D:Biscuit\5820\ VGA\Winn\Audio"...
PCI Bus Ethernet Interface This chapter provides information on Ethernet configuration. • Introduction • Installation of Ethernet driver for Windows 95/98/NT...
Introduction The PCM-5820 Series is equipped with a high performance 32-bit Ethernet chipset which is fully compliant with IEEE 802.3 100 Mbps CSMA/CD standards. It is supported by major network operating systems. It is also both 100Base-T and 10Base-T compatible. The medium type can be configured via the RSET8139.exe program included on the utility disk.
7.2.2 Installation for Windows 95/98 a. Select "Start", "Settings", "Control Panel". b. Double click "Network". a. Click "Add" and prepare to install network functions. a. Select the "Adapter" item to add the Ethernet card. a. Click "Have Disk" to install the driver. Chapter 7 PCI Bus Ethernet Interface...
Page 88
a. Insert the disc labeled "RTL8139A into the D:\ drive. Driver #2" into drive b. Fill in "D:\5820\ Ethernet.100\Win95\". b. Fill in the correct path. D:\5820\Ethernet.100\Win95\ A:\Win95\ c. Click "OK". a. Choose the "Realtek" item. b. Click "OK". a. Make sure the configurations of relative items are set correctly.
7.2.3 Installation for Windows NT a. Select "Start", "Settings", "Control Panel". b. Double click "Network". a. Choose the "Adapters" label. b. Click the "Add" button. a. Press "Have Disk". a. Type "A:". b. Press "OK". Chapter 7 PCI Bus Ethernet Interface...
Page 90
a. Insert the disc labeled "RTL8139A into the D:\ drive. Driver #2" into drive b. Fill in "D:\5820\ Ethernet.100\Winnt\". b. Fill in the correct path. D:\5820\Ethernet.100\Winnt\ A:\Winnt\ c. Click "OK". a. Choose the "Realtek" item. b. Click "OK". a. Make sure the configurations of relative items are set correctly.
Pin Assignments This appendix contains information of a detailed or specialized nature. It includes: • CRT display connector • Flat panel display connector • COM2 RS-232/422/485 serial port connector • Keyboard and mouse connector • Main power connector • IDE hard drive connector •...
COM2 RS-232/422/485 serial port (CN14) Table A-3: COM2 RS-232/422/485 series port RS-232 port RS-422 port RS-485 port TxD+ DATA+ TxD- DATA- RxD+ RxD- Keyboard and mouse connnector (CN17) Table A-4: Keyboard and mouse connector Signal KB DATA MS DATA KB CLOCK MS CLOCK Appendix A Pin Assignments...
Main power connector (CN9) Table A-5: Main power connector Signal +12 V +5 V IDE hard drive connector (CN11) Table A-6: IDE hard drive connector Pin Signal Pin Signal IDE RESET* DATA 7 DATA 8 DATA 6 DATA 9 DATA 5 DATA 10 DATA 4 DATA 11...
COM1 RS-232 serial port (CN16) Table A-7: COM1 RS-232 serial port Signal Ethernet 100Base-T connector (CN13) Table A-8: Ethernet 100Base-T connector Signal XMT+ XMT- RCV+ RCV- Appendix A Pin Assignments...
Auxilary power connector (CN10) Table A-9: Peripheral power connector Signal -12 V -5 V Floppy drive connector (CN2) Table A-10: Floppy drive connector Signal Signal DENSITY SELECT* INDEX* MOTOR 0* DRIVE SELECT 1* DRIVE SELECT 0* MOTOR 1* DIRECTION* STEP* WRITE DATA* WRITE GATE* TRACK 0*...
Parallel port connector (CN3) Table A-11: Parallel port connector Signal STROBE* AUTOFD* ERROR* INIT* SLCTINI* ACK* BUSY SLCT * low active Appendix A Pin Assignments...
IR connector (CN7) Table A-12: IR connector Signal +5 V (VCC) IR_RX IR_TX USB connector (CN4) Table A-13: USB connector Signal Signal USBVCC (5 V) USB VCC (5 V) DATA 0- DATA 1- DATA 0+ DATA 1+ Audio connector (CN5) Table A-14: Audio connector Signal Signal...
CD audio connector (CN1) Table A-15: CD audio connector Signal CD audio control R CD audio control L LVDS connector (CN15) Table A-16: LVDS connector Signal Signal TX0- TX0+ TX1- TX1+ TX2- TX2+ TXCK- TXCK+ CPU fan power connector (CN6) Table A-17: CPU fan power connector Signal +5 V...
S-Video connector (CN21) Table A-18: S-Video connector Signal Luminance output (brightness) Chrominance output (color) Table A-19: SCART Mode (optional) Signal Blue CSYNC Green RCA (composite) connector (CN22) C om posite G N D PCM-5820 Series User's Manual...
ATX power feature connector (CN23) Table A-20: ATX power feature connector (CN23) Signal 5VSB (Stand-by voltage) VPSON ATX power button & power LED connector (CN24) Table A-21: ATX power button & power LED connector (CN24) Signal LED+ Button+ LED- (GND) Button- (GND) Appendix A Pin Assignments...
D.1 Installing PC/104 modules The PCM-5820 Series' PC/104 connectors give you the flexibility to attach PC/104 modules. Installing these modules on the PCM-5820 Series is quick and simple. The following steps show how to mount the PC/104 modules: 1. Remove the PCM-5820 Series from your system, paying particular attention to the safety instructions already mentioned above.
P C /1 0 4 M o u n tin g S u p p o rt F e m a le M a le P C /1 0 4 m o d u le P C M -5 8 20 S e rie s Figure D-1: PC/104 module mounting diagram 8 .9 8 2.5...
Table D-1: PC/104 connectors (CN8) Signal Signal Number Row A Row B Row C Row D — — IOCHCHK* 0 V SBHE* MEMCS16* RESETDRV LA23 IOCS16* +5 V LA22 IRQ10 IRQ9 LA21 IRQ11 -5 V LA20 IRQ12 DRQ2 LA19 IRQ15 -12 V LA18 IRQ14...
Programming the Watchdog Timer The PCM-5820 Series is equipped with a watchdog timer that resets the CPU or generates an interrupt if processing comes to a standstill for whatever reason. This feature ensures system reliability in industrial standalone or unmanned environments.
Programming the watchdog timer Jumper J3 controls the watchdog settings. The default configura- tion of the timer is enabled via a system reset. To enable the watchdog timer, you must write a program which writes 1 to I/O port address 443 (hex) at regular intervals. The first time your program reads the port, it enables the watchdog timer.
Page 119
The following program shows how you might program the watchdog timer in BASIC: Watchdog timer example program X=Out &H443, 1 REM Enable and refresh the watchdog GOSUB 1000 REM Task #1, takes 1 second to complete X=Out &H443, 1 REM Refresh the watchdog GOSUB 2000 REM Task #2, takes 1 second to...
Need help?
Do you have a question about the PCM-5820 and is the answer not in the manual?
Questions and answers