BECKHOFF CB4050 User Manual
CB4050
Manual
Revision 3.4
Beckhoff Automation GmbH phone: +49 (0) 52 46/963-0
Eiserstr. 5 fax: +49 (0) 52 46/963-198
33415 Verl email: info@beckhoff.de
Germany web: www.beckhoff.de
Contents
Contents
0 Document History ................................................................................................................................. 5
1 Introduction ........................................................................................................................................... 6
1.1 Notes on the Documentation ......................................................................................................... 6
1.1.1 Liability Conditions ................................................................................................................ 6
1.1.2 Copyright ............................................................................................................................... 6
1.2 Safety Instructions ......................................................................................................................... 7
1.2.1 Disclaimer .............................................................................................................................. 7
1.2.2 Description of Safety Symbols .............................................................................................. 7
1.3 Essential Safety Measures ............................................................................................................ 8
1.3.1 Operator's Obligation to Exercise Diligence .......................................................................... 8
1.3.2 National Regulations Depending on the Machine Type ........................................................ 8
1.3.3 Operator Requirements ......................................................................................................... 8
1.4 Functional Range .......................................................................................................................... 9
2 Overview ............................................................................................................................................. 10
2.1 Features ...................................................................................................................................... 10
2.2 Specifications and Documents .................................................................................................... 12
3 Detailed Description ........................................................................................................................... 13
3.1 Power Supply .............................................................................................................................. 13
3.2 CPU ............................................................................................................................................. 13
3.3 Memory ....................................................................................................................................... 13
4 Connectors ......................................................................................................................................... 14
4.1 Connector Map ............................................................................................................................ 15
4.2 Power Supply .............................................................................................................................. 16
4.3 System ........................................................................................................................................ 17
4.4 Memory ....................................................................................................................................... 18
4.5 PC/104-Bus ................................................................................................................................. 21
4.6 PC/104-Plus Bus ......................................................................................................................... 23
4.7 VGA ............................................................................................................................................. 25
4.8 LCD ............................................................................................................................................. 26
4.9 USB 1 to 4, LAN, Sound ............................................................................................................. 28
4.10 IDE Interface ............................................................................................................................... 30
4.11 Parallel Interface LPT .................................................................................................................. 31
4.12 Serial Interface COM1 ................................................................................................................. 32
4.13 Serial Interface COM2 ................................................................................................................. 33
4.14 SMBus ......................................................................................................................................... 34
4.15 Monitoring Functions ................................................................................................................... 35
4.16 Fan .............................................................................................................................................. 36
5 BIOS Settings ..................................................................................................................................... 37
5.1 Remarks for Setup Use ............................................................................................................... 37
5.2 Top Level Menu ........................................................................................................................... 37
5.3 Standard CMOS Features ........................................................................................................... 38
5.3.1 IDE Primary Master/Slave ................................................................................................... 39
5.4 Advanced BIOS Features ........................................................................................................... 40
5.4.1 CPU Feature ....................................................................................................................... 42
5.5 Advanced Chipset Features ........................................................................................................ 43
5.6 Integrated Peripherals ................................................................................................................. 45
Beckhoff New Automation Technology CB4050 page 3
Contents
5.6.1 OnChip IDE Devices ........................................................................................................... 46
5.6.2 Onboard Devices ................................................................................................................. 47
5.6.3 SuperIO Devices ................................................................................................................. 48
5.7 Power Management Setup .......................................................................................................... 49
5.8 PnP/PCI Configuration ................................................................................................................ 51
5.8.1 IRQ Resources .................................................................................................................... 52
5.8.2 Memory Resources ............................................................................................................. 53
5.9 PC Health Status ......................................................................................................................... 54
5.10 Frequency/Voltage Control ......................................................................................................... 56
5.11 Load Fail-Safe Defaults ............................................................................................................... 57
5.12 Load Optimized Defaults ............................................................................................................. 57
5.13 Set Password .............................................................................................................................. 57
5.14 Save & Exit Setup ....................................................................................................................... 57
5.15 Exit Without Saving ..................................................................................................................... 57
6 BIOS update ....................................................................................................................................... 58
7 Mechanical Drawing ........................................................................................................................... 59
7.1 PCB: Dimensions ........................................................................................................................ 59
7.2 PCB: Pin1 Dimensions ................................................................................................................ 60
7.3 PCB: Heatsink Dimensions ......................................................................................................... 61
8 Technical Data .................................................................................................................................... 62
8.1 Electrical Data ............................................................................................................................. 62
8.2 Environmental Conditions ........................................................................................................... 62
8.3 Thermal Specifications ................................................................................................................ 63
9 Support and Service ........................................................................................................................... 64
9.1 Beckhoff's Branch Offices and Representatives ......................................................................... 64
9.2 Beckhoff Headquarters................................................................................................................ 64
9.2.1 Beckhoff Support ................................................................................................................. 64
9.2.2 Beckhoff Service ................................................................................................................. 64
I Annex: Post-Codes ............................................................................................................................. 65
II Annex: Resources .............................................................................................................................. 68
A IO Range ......................................................................................................................................... 68
B Memory Range ................................................................................................................................ 68
C Interrupt ........................................................................................................................................... 68
D PCI Devices ..................................................................................................................................... 69
E SMB Devices ................................................................................................................................... 69
page 4 Beckhoff New Automation Technology CB4050
Notes on the Documentation Chapter: Document History
0 Document History
Revision Changes
0.9 first AuthorIT-managed version, many changes, e.g.:
- new photographs (D5)
- "merging" effort between several English versions
- new connector symbols
- several minor bugs corrected
todo: update dimensional drawing
1.0 updated PCI table, minor changes
1.1 updated dimensional drawings
3.0 - new version number (older, pre-AIT versions had already reached 2.x)
- added connector map
- updated block diagram
- updated temperature ranges
- several small changes
3.1 updated contact details, minor changes
3.2 minor changes
3.3 added caution note regarding PS_ON, minor changes
3.4 improved output quality of dimensional drawings, minor changes
NOTE
All company names, brand names, and product names referred to in this manual are registered or
unregistered trademarks of their respective holders and are, as such, protected by national and
international law.
Beckhoff New Automation Technology CB4050 page 5
Chapter: Introduction Notes on the Documentation
1 Introduction
1.1 Notes on the Documentation
This description is only intended for the use of trained specialists in control and automation engineering
who are familiar with the applicable national standards. It is essential that the following notes and
explanations are followed when installing and commissioning these components.
1.1.1 Liability Conditions
The responsible staff must ensure that the application or use of the products described satisfy all the
requirements for safety, including all the relevant laws, regulations, guidelines and standards.
The documentation has been prepared with care. The products described are, however, constantly under
development. For that reason the documentation is not in every case checked for consistency with
performance data, standards or other characteristics. None of the statements of this manual represents a
guarantee (Garantie) in the meaning of § 443 BGB of the German Civil Code or a statement about the
contractually expected fitness for a particular purpose in the meaning of § 434 par. 1 sentence 1 BGB. In
the event that it contains technical or editorial errors, we retain the right to make alterations at any time
and without warning. No claims for the modification of products that have already been supplied may be
made on the basis of the data, diagrams and descriptions in this documentation.
1.1.2 Copyright
© This documentation is copyrighted. Any reproduction or third party use of this publication, whether in
whole or in part, without the written permission of Beckhoff Automation GmbH, is forbidden.
page 6 Beckhoff New Automation Technology CB4050
Safety Instructions Chapter: Introduction
1.2 Safety Instructions
Please consider the following safety instructions and descriptions. Product specific safety instructions are
to be found on the following pages or in the areas mounting, wiring, commissioning etc.
1.2.1 Disclaimer
All the components are supplied in particular hardware and software configurations appropriate for the
application. Modifications to hardware or software configurations other than those described in the
documentation are not permitted, and nullify the liability of Beckhoff Automation GmbH.
1.2.2 Description of Safety Symbols
The following safety symbols are used in this documentation. They are intended to alert the reader to the
associated safety instructions.
ACUTE RISK OF INJURY!
If you do not adhere to the safety advise next to this symbol, there is immediate danger to life and health
of individuals!
RISK OF INJURY!
If you do not adhere to the safety advise next to this symbol, there is danger to life and health of
individuals!
HAZARD TO INDIVIDUALS, ENVIRONMENT, DEVICES, OR DATA!
If you do not adhere to the safety advise next to this symbol, there is obvious hazard to individuals, to
environment, to materials, or to data.
NOTE OR POINTER
This symbol indicates information that contributes to better understanding.
Beckhoff New Automation Technology CB4050 page 7
Chapter: Introduction Essential Safety Measures
1.3 Essential Safety Measures
1.3.1 Operator's Obligation to Exercise Diligence
The operator must ensure that
o the product is only used for its intended purpose
o the product is only operated in sound condition and in working order
o the instruction manual is in good condition and complete, and always available for reference at the
location where the products are used
o the product is only used by suitably qualified and authorised personnel
o the personnel is instructed regularly about relevant occupational safety and environmental protection
aspects
o the operating personnel is familiar with the operating manual and in particular the safety notes
contained herein
1.3.2 National Regulations Depending on the Machine Type
Depending on the type of machine and plant in which the product is used, national regulations governing
the controllers of such machines will apply, and must be observed by the operator. These regulations
cover, amongst other things, the intervals between inspections of the controller. The operator must initiate
such inspections in good time.
1.3.3 Operator Requirements
o Read the operating instructions
All users of the product must have read the operating instructions for the system they work with.
o System know-how
All users must be familiar with all accessible functions of the product.
page 8 Beckhoff New Automation Technology CB4050
Functional Range Chapter: Introduction
1.4 Functional Range
NOTE
The descriptions contained in the present documentation represent a detailed and extensive product
description. As far as the described motherboard was acquired as an integral component of an Industrial
PC from Beckhoff Automation GmbH, this product description shall be applied only in limited scope. Only
the contractually agreed specifications of the corresponding Industrial PC from Beckhoff Automation
GmbH shall be relevant. Due to several models of Industrial PCs, variations in the component placement
of the motherboards are possible. Support and service benefits for the built-in motherboard will be
rendered by Beckhoff Automation GmbH exclusively as specified in the product description (inclusive
operation system) of the particular Industrial PC.
Beckhoff New Automation Technology CB4050 page 9
Chapter: Overview Features
2 Overview
2.1 Features
The CB4050 is a highly complex PC/104-Plus board with the functionalities of a motherboard. Standard
features include an Intel® Pentium® M or Intel® Celeron® M CPU, up to 1 GByte RAM (DDR-333) via
SO-DIMM200, PCI (PC/104-Plus™) and ISA (PC/104™) bus connectors. The CB4050 also has many
additional onboard peripherals: two serial interfaces, one printer interface, floppy connection (via LPT
port), LAN connection, Audio in and out, four USB interfaces, CRT and IDE connection.
CRT
LCD
USB1
USB2
USB3
USB4
KB
MS
Clock
ICS950813
LVDS 18/24/36/48
Winbond®
W83627HF
Intel® Pentium® M,
Celeron®M
HOST
GMCH
Intel® 82855GME
Hub Int
USB 2.0
MEMORY
ACLink
ICH 4
Intel® 82801DB
Intern LAN
LPC PCI
LPC to ISA:
BIOS
W83626 /
F85226F
VCCCore; VTT; DDRVTT
Power
1,5V; 1,8V; 2,5V; 3,3V
SoDIMM200
DDR333
RealTek®
ALC650/655
Intel®
82551ER/
82562EZ
SPDIF i
SPDIF o
LINE
MIC
OUT
IDE1
Slot1
Slot2
Slot3
COM1
COM2
LPT/FDC
Watchdog
PC/104
PC/104 Plus
PC/104 Plus
PC/104 Plus
Slot4
PC/104 Plus
LAN
o Processor Intel® Celeron® M, Pentium® M
o Chipset Intel® 855GME and Intel® ICH4
o SO-DIMM200 socket for up to 1 GByte RAM (DDR-333), capable of ECC
o Two serial interfaces COM1 and COM2
o One parallel interface LPT (also for floppy)
o Ethernet 10/100 (Base-T)
o IDE interface
o PS2 keyboard / mouse interface
o Four USB 2.0 interfaces
o AWARD® BIOS 6.10
o CRT connection
o TFT connection, LVDS 18/24Bit (single and dual pixel displays)
o AC97 compatible sound controller with SPDIF in and out
page 10 Beckhoff New Automation Technology CB4050
Features Chapter: Overview
o RTC with external CMOS battery
o 5V single supply voltage
o ISA bus via PC/104 connector
o PCI bus via PC/104-Plus connector
o Size 96 mm x 90 (115,5) mm
Beckhoff New Automation Technology CB4050 page 11
Chapter: Overview Specifications and Documents
2.2 Specifications and Documents
In making this manual and for further reading of technical documentation, the following documents,
specifications and web-pages were used and are recommended.
§ ISA specification
IEEE996P
www.ieee.org
§ PC/104™ specification
revision 2.5
www.pc104.org
§ PC/104-Plus™ specification
revision 2.0
www.pc104.org
§ PCI specification
revision 2.3 resp. 3.0
www.pcisig.com
§ ACPI specification
revision 3.0
www.acpi.info
§ ATA/ATAPI specification
version 7 rev. 1
www.t13.org
§ USB specifications
www.usb.org
§ SM-Bus specification
revision 2.0
www.smbus.org
§ Intel® chipset description
855GM/GME Datasheet, Design Guide
www.intel.com
§ Intel® chipset description
ICH4 Datasheet
www.intel.com
§ Intel® chip description
Celeron® M, Pentium® M
www.intel.com
§ Winbond® chip description
W83627HF, W83626 Datasheet
www.winbond-usa.com oder www.winbond.com.tw
§ Fintek® chip description
F85226F Datasheet
www.fintek.com.tw
§ Intel® chip description
82562EZ Datasheet
www.intel.com
§ Intel® chip description
82551ER Datasheet
www.intel.com
§ ICS® chip description
ICS950813 Datasheet
www.icst.com
page 12 Beckhoff New Automation Technology CB4050
Power Supply Chapter: Detailed Description
3 Detailed Description
3.1 Power Supply
The power supply of the hardware module is effected via the power connector. The board only requires
an operating voltage of 5 volt ± 5%.
3.2 CPU
The board can be ordered with one of the following processors employed: Intel® Celeron® M, Intel®
Celeron® M ULV, Intel® Pentium® M. The package type allows a maximum DIE temperature of 100
degrees Celsius and accords highest possible security even in rough environment.
The processors include a second level cache of up to 2 MByte, depending on which model is used.
Furthermore the processors offer many features known from the desktop range such as MMX2, serial
number, loadable microcode etc.
3.3 Memory
There is one conventional SO-DIMM200 socket available to equip the board with memory. For technical
and mechanical reasons it is possible that particular memory modules cannot be employed. Please ask
your sales representative for recommended memory modules.
With currently available SO-DIMM200 modules a memory extension up to 1 GByte is possible
(DDR-333).
Beckhoff New Automation Technology CB4050 page 13
Chapter: Connectors Memory
4 Connectors
This section describes all the connectors found on the CB4050.
CAUTION
For most interfaces, the cables must meet certain requirements. For instance, USB 2.0 requires twisted
and shielded cables to reliably maintain full speed data rates. Restrictions on maximum cable length are
also in place for many high speed interfaces and for power supply. Please refer to the respective
specifications and use suitable cables at all times.
page 14 Beckhoff New Automation Technology CB4050
Connector Map Chapter: Connectors
4.1 Connector Map
Please use the connector map below for quick reference. Only connectors on the component side are
shown. For more information on each connector refer to the table below.
Ref-No. Function Page
P401 "Fan" p. 36
U403* "Memory" p. 18
P700 "Serial Interface COM1" p. 32
P702 "Parallel Interface LPT" p. 31
P703 "Serial Interface COM2" p. 33
P704 "IDE Interface" p. 30
P705 "USB 1 to 4, LAN, Sound" p. 28
P706/7 "LCD" p. 26
P1001 "System" p. 17
P1002/6 "PC/104-Bus" p. 21
P1003 "Power Supply" p. 16
P1004 "PC/104-Plus Bus" p. 23
P1005 "VGA" p. 25
P1007 "SMBus" p. 34
P1008 "Monitoring Functions" p. 35
* not in the picture above (cf. bottom side of board)
Beckhoff New Automation Technology CB4050 page 15
Chapter: Connectors Power Supply
4.2 Power Supply
The connector for the power supply is a standard IDC socket connector with a spacing of 2.54 mm.
The board only requires an operating voltage of 5 volt ± 5%. 3.3V output to the PC/104-Plus bus is the
only off-board supply available.
Should additional voltages be needed for PC/104 expansion cards, these must be provided externally by
connecting the respective pins (see below).
For maximum current availability, it is recommended to use both this power connector and the PC/104
connector for power supply.
NOTE
For "Real Time Clock" an external battery (3.3V) must be connected. You can use pins 1 & 3 here or the
"System" connector (see next page).
Description Name Pin Name Description
ground GND 1 2 VCC 5 volt supply
CMOS battery >= 3 volt VBAT 3 4 12V 12 volt supply
-5 volt supply -5V 5 6 -12V -12 volt supply
ground GND 7 8 VCC 5 volt supply
page 16 Beckhoff New Automation Technology CB4050
System Chapter: Connectors
4.3 System
The system connector, which has the main functions that are necessary to start the board, is provided via
a standard IDC socket connector with a spacing of 2.54 mm.
This connector supports the following interfaces: PS/2 keyboard, PS/2 mouse, speaker, external
RTC-battery and reset of the board.
NOTE
For "Real Time Clock" an external battery (3.3V) must be connected. Connect "+" to VBAT and "-" to
GND.
Description Name Pin Name Description
speaker to 5 volt SPEAKER 1 2 GND ground
reset to ground RESET# 3 4 KLOCK# keyboard lock
keyboard Data KDAT 5 6 KCLK keyboard clock
mouse data MDAT 7 8 MCLK mouse clock
CMOS battery ≥ 3 volt VBAT 9 10 VCC 5 volt supply
Beckhoff New Automation Technology CB4050 page 17
Chapter: Connectors Memory
4.4 Memory
There is one conventional SO-DIMM200 socket available to equip the board with memory (DDR-333). It is
located on the bottom side of the board. For technical and mechanical reasons it is possible that
particular memory modules cannot be employed. Please ask your sales representative for recommended
memory modules.
With currently available SO-DIMM modules a memory extension up to 1 GByte is possible. The timing
parameters for different memory modules are automatically set by BIOS.
Description Name Pin Name Description
memory reference current REF 1 2 REF memory reference current
ground GND 3 4 GND ground
data 0 DQ0 5 6 DQ4 data 4
data 1 DQ1 7 8 DQ5 data 5
2.5 volt supply 2.5V 9 10 2.5V 2.5 volt supply
data strobe 0 DQS0 11 12 DQM0 data mask 0
data 2 DQ2 13 14 DQ6 data 6
ground GND 15 16 GND ground
data 3 DQ3 17 18 DQ7 data 7
data 8 DQ8 19 20 DQ12 data 12
2.5 volt supply 2.5V 21 22 2.5V 2.5 volt supply
data 9 DQ9 23 24 DQ13 data 13
data strobe 1 DQS1 25 26 DQM1 data mask 1
ground GND 27 28 GND ground
data 10 DQ10 29 30 DQ14 data 14
data 11 DQ11 31 32 DQ15 data 15
2.5 volt supply 2.5V 33 34 2.5V 2.5 volt supply
clock CK0 35 36 2.5V 2.5 volt supply
clock CK0# 37 38 2.5V 2.5 volt supply
ground GND 39 40 GND ground
data 16 DQ16 41 42 DQ20 data 20
data 17 DQ17 43 44 DQ21 data 21
2.5 volt supply 2.5V 45 46 2.5V 2.5 volt supply
data strobe 2 DQS2 47 48 DQM2 data mask 2
data 18 DQ18 49 50 DQ22 data 22
page 18 Beckhoff New Automation Technology CB4050
Memory Chapter: Connectors
Description Name Pin Name Description
ground GND 51 52 GND ground
data 19 DQ19 53 54 DQ23 data 23
data 24 DQ24 55 56 DQ28 data 28
2.5 volt supply 2.5V 57 58 2.5V 2.5 volt supply
data 25 DQ25 59 60 DQ29 data 29
data strobe 3 DQS3 61 62 DQM3 data mask 3
ground GND 63 64 GND ground
data 26 DQ26 65 66 DQ30 data 30
data 27 DQ27 67 68 DQ31 data 31
2.5 volt supply 2.5V 69 70 2.5V 2.5 volt supply
data check bit 0 CB0 71 72 CB4 data check bit 4
data check bit 1 CB1 73 74 CB5 data check bit 5
ground GND 75 76 GND ground
data strobe 8 DQS8 77 78 DQM8 data mask 8
data check bit 2 CB2 79 80 CB6 data check bit 6
2.5 volt supply 2.5V 81 82 2.5V 2.5 volt supply
data check bit 3 CB3 83 84 CB7 data check bit 7
reserved N/C 85 86 N/C reserved
ground GND 87 88 GND ground
clock CK2 89 90 GND ground
clock CK2# 91 92 2.5V 2.5 volt supply
2.5 volt supply 2.5V 93 94 2.5V 2.5 volt supply
clock enables 1 CKE1 95 96 CKE0 clock enables 0
reserved N/C 97 98 N/C reserved
address 12 A12 99 100 A11 address 11
address 9 A9 101 102 A8 address 8
ground GND 103 104 GND ground
address 7 A7 105 106 A6 address 6
address 5 A5 107 108 A4 address 4
address 3 A3 109 110 A2 address 2
address 1 A1 111 112 A0 address 0
2.5 volt supply 2.5V 113 114 2.5V 2.5 volt supply
address 10 A10 115 116 BA1 SDRAM bank 1
SDRAM bank 0 BA0 117 118 RAS# row address strobe
write enable WE# 119 120 CAS# column address strobe
chip select S0# 121 122 S1# chip select
reserved N/C 123 124 N/C reserved
ground GND 125 126 GND ground
data 32 DQ32 127 128 DQ36 data 36
data 33 DQ33 129 130 DQ37 data 37
2.5 volt supply 2.5V 131 132 2.5V 2.5 volt supply
data strobe 4 DQS4 133 134 DQM4 data mask 4
data 34 DQ34 135 136 DQ38 data 38
ground GND 137 138 GND ground
data 35 DQ35 139 140 DQ39 data 39
data 40 DQ40 141 142 DQ44 data 44
2.5 volt supply 2.5V 143 144 2.5V 2.5 volt supply
data 41 DQ41 145 146 DQ45 data 45
data strobe 5 DQS5 147 148 DQM5 data mask 5
ground GND 149 150 GND ground
data 42 DQ42 151 152 DQ46 data 46
data 43 DQ43 153 154 DQ47 data 47
2.5 volt supply 2.5V 155 156 2.5V 2.5 volt supply
2.5 volt supply 2.5V 157 158 CK1# clock
ground GND 159 160 CK1 clock
Beckhoff New Automation Technology CB4050 page 19
Chapter: Connectors Memory
Description Name Pin Name Description
ground GND 161 162 GND ground
data 48 DQ48 163 164 DQ52 data 52
data 49 DQ49 165 166 DQ53 data 53
2.5 volt supply 2.5V 167 168 2.5V 2.5 volt supply
data strobe 6 DQS6 169 170 DQM6 data mask 6
data 50 DQ50 171 172 DQ54 data 54
ground GND 173 174 GND ground
data 51 DQ51 175 176 DQ55 data 55
data 56 DQ56 177 178 DQ60 data 60
2.5 volt supply 2.5V 179 180 2.5V 2.5 volt supply
data 57 DQ57 181 182 DQ61 data 61
data strobe 7 DQS7 183 184 DQM7 data mask 7
ground GND 185 186 GND ground
data 58 DQ58 187 188 DQ62 data 62
data 59 DQ59 189 190 DQ63 data 63
2.5 volt supply 2.5V 191 192 2.5V 2.5 volt supply
SPD data SDA 193 194 SA0 SPD address
SPD clock SCL 195 196 SA1 SPD address
3.3 volt supply 3.3V 197 198 SA2 SPD address
reserved N/C 199 200 N/C reserved
page 20 Beckhoff New Automation Technology CB4050
PC/104-Bus Chapter: Connectors
4.5 PC/104-Bus
An onboard LPC-to-ISA bridge (Fintek® F85226F) makes it possible to expand the functionality of the
board with additional PC/104 cards. This interface offers full 16bit ISA compliance. For further information
on this interface please refer to the PC/104 specifications (see "Specifications and Documents", p. 12).
Pinning of the standard 8 bit PC/104 connector.
Description Name Pin Name Description
ISA - IO channel check IOCHK# A1 B1 GND ground
ISA – data 7 SD7 A2 B2 RSTDRV reset drive
ISA – data 6 SD6 A3 B3 VCC 5 volt supply
ISA – data 5 SD5 A4 B4 IRQ9 ISA – interrupt 9 (2)
ISA – data 4 SD4 A5 B5 -5V -5 volt supply
ISA – data 3 SD3 A6 B6 DRQ2 ISA – DMA request 2
ISA – data 2 SD2 A7 B7 -12V -12 volt supply
ISA – data 1 SD1 A8 B8 IOCHRDY ISA – IO channel ready
ISA – data 0 SD0 A9 B9 12V 12 volt supply
ISA – IO channel ready IOCHRDY A10 B10 N/C reserved
ISA – address enable AEN A11 B11 SMEMW# ISA – system memory write
ISA – address 19 SA19 A12 B12 SMEMR# ISA – system memory read
ISA – address 18 SA18 A13 B13 IOW# ISA – IO write
ISA – address 17 SA17 A14 B14 IOR# ISA – IO read
ISA – address 16 SA16 A15 B15 DACK3# ISA – DMA acknowledge 3
ISA – address 15 SA15 A16 B16 DRQ3 ISA – DMA request 3
ISA – address 14 SA14 A17 B17 DACK1# ISA – DMA acknowledge 1
ISA – address 13 SA13 A18 B18 DRQ1 ISA – DMA request 1
ISA – address 12 SA12 A19 B19 REFRESH# ISA – refresh
ISA – address 11 SA11 A20 B20 SYSCLK ISA – system clock
ISA – address 10 SA10 A21 B21 IRQ7 ISA – interrupt 7
ISA – address 9 SA9 A22 B22 IRQ6 ISA – interrupt 6
ISA – address 8 SA8 A23 B23 IRQ5 ISA – interrupt 5
ISA – address 7 SA7 A24 B24 IRQ4 ISA – interrupt 4
ISA – address 6 SA6 A25 B25 IRQ3 ISA – interrupt 3
ISA – address 5 SA5 A26 B26 DACK2# ISA – DMA acknowledge 2
ISA – address 4 SA4 A27 B27 T/C ISA – terminal count
ISA – address 3 SA3 A28 B28 BALE ISA – address latch en.
Beckhoff New Automation Technology CB4050 page 21
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