HMS Anybus CompactCom B40-1 Guide

AAnnyybbuuss®® CCoommppaaccttCCoomm BB4400--11
DESIGN GUIDE
HMSI-27-230 3.4 en-US ENGLISH

Important User Information
Liability
Every care has been taken in the preparation of this document. Please inform HMS Industrial Networks of any
inaccuracies or omissions. The data and illustrations found in this document are not binding. We, HMS Industrial
Networks, reserve the right to modify our products in line with our policy of continuous product development. The
information in this document is subject to change without notice and should not be considered as a commitment by
HMS Industrial Networks. HMS Industrial Networks assumes no responsibility for any errors that may appear in this
document.
There are many applications of this product. Those responsible for the use of this device must ensure that all the
necessary steps have been taken to verify that the applications meet all performance and safety requirements
including any applicable laws, regulations, codes, and standards.
HMS Industrial Networks will under no circumstances assume liability or responsibility for any problems that may
arise as a result from the use of undocumented features, timing, or functional side effects found outside the
documented scope of this product. The effects caused by any direct or indirect use of such aspects of the product
are undefined, and may include e.g. compatibility issues and stability issues.
The examples and illustrations in this document are included solely for illustrative purposes. Because of the many
variables and requirements associated with any particular implementation, HMS Industrial Networks cannot assume
responsibility for actual use based on these examples and illustrations.
Intellectual Property Rights
HMS Industrial Networks has intellectual property rights relating to technology embodied in the product described in
this document. These intellectual property rights may include patents and pending patent applications in the USA
and other countries.
Anybus®CompactCom B40-1 Design Guide HMSI-27-230 3.4 en-US

Anybus®CompactCom B40-1 Design Guide HMSI-27-230 3.4 en-US
Table of Contents Page
1 Preface ................................................................................................................................. 3
1.1 About this Document........................................................................................................3
1.2 Related Documents ..........................................................................................................3
1.3 Document history ............................................................................................................3
1.4 Document Conventions.....................................................................................................4
1.5 Document Specific Conventions..........................................................................................4
1.6 Trademark Information.....................................................................................................5
2 About the Anybus CompactCom B40-1.............................................................................. 6
2.1 General Information.........................................................................................................6
2.2 Features.........................................................................................................................7
3 Host Interface ...................................................................................................................... 8
3.1 Overview........................................................................................................................8
3.2 Host Application Connector ............................................................................................. 10
3.3 Parallel Interface Operation ............................................................................................. 20
3.4 SPI Operation ................................................................................................................ 26
3.5 Stand-alone Shift Register................................................................................................ 30
3.6 UART Operation............................................................................................................. 37
4 Network Connector........................................................................................................... 40
4.1 Overview...................................................................................................................... 41
4.2 Power Supply Pins.......................................................................................................... 43
4.3 How to Connect Unused Network Connector Pins................................................................ 43
4.4 Ethernet Based Networks (Copper) ................................................................................... 44
4.5 Ethernet Fiber Optic Networks ......................................................................................... 45
4.6 DeviceNet..................................................................................................................... 47
4.7 PROFIBUS ..................................................................................................................... 47
4.8 CC-Link......................................................................................................................... 47
4.9 LED Indicators ............................................................................................................... 48
5 EMC .................................................................................................................................... 50
5.1 General........................................................................................................................ 50
5.2 Bulk and Decoupling....................................................................................................... 50
5.3 Reset Signal .................................................................................................................. 50

Anybus®CompactCom B40-1 Design Guide HMSI-27-230 3.4 en-US
6 Black Channel/Safety Interface ........................................................................................ 51
A Mechanical Specification .................................................................................................. 53
A.1 Anybus CompactCom B40-1............................................................................................. 53
A.2 Connector Board for PROFIBUS ........................................................................................ 54
A.3 Connector Board for Copper Based Ethernet....................................................................... 55
A.4 Connector Board for Fiber Optic Ethernet .......................................................................... 56
A.5 Connector Board for CC-Link and DeviceNet ....................................................................... 57
A.6 Footprints..................................................................................................................... 58
A.7 Height Restrictions ......................................................................................................... 59
A.8 Front Plate Restrictions ................................................................................................... 60
A.9 Assembly...................................................................................................................... 60
B Technical Specification...................................................................................................... 63
B.1 Environmental............................................................................................................... 63
B.2 Shock and Vibration ....................................................................................................... 63
B.3 Electrical Characteristics.................................................................................................. 63
B.4 Regulatory Compliance ................................................................................................... 64
C How to Disable Ethernet Port 2 (EtherNet/IP) ................................................................ 65
D Implementation Examples................................................................................................ 66
D.1 General........................................................................................................................ 66
D.2 SPI............................................................................................................................... 67
D.3 16-bit Parallel................................................................................................................ 68
D.4 8-bit Parallel.................................................................................................................. 69
D.5 Serial ........................................................................................................................... 70
D.6 Network Status LED Outputs (LED[1A...4B]) ........................................................................ 70
D.7 Power Supply Considerations ........................................................................................... 72
E Design Examples, Network Interface ............................................................................... 74
E.1 Recommendations ......................................................................................................... 74
E.2 PCB Layout ................................................................................................................... 76
E.3 Network Interface Examples ............................................................................................ 77

Preface 3 (78)
1 Preface
1.1 About this Document
This document is intended to provide a good understanding of how to use the Anybus
CompactCom B40-1.
The reader of this document is expected to be familiar with hardware design and communication
systems in general. For additional information, documentation, support etc., please visit the
support website at www.anybus.com/support.
1.2 Related Documents
Document Author Document ID
Anybus CompactCom 40 Software Design Guide HMS HMSI-216-125
Anybus CompactCom 40 Network Guides HMS
Anybus CompactCom Host Application Implementation Guide HMS HMSI-27-334
1.3 Document history
Version Date Description
1.23 2015-09-03 Last FM version.
2.0 2016-03-10 Moved from FM to XML
Misc. updates
2.1 2016-12-07 Added information for Anybus CompactCom B40 CC-Link IE Field
Minor corrections and updates
3.0 2017-09-12 Added content to make the design guide independent of the M40 HWDG
Added new example schematics
Added BACnet/IP
3.1 2018-03-09 Updated section on DIP1 and DIP2 usage
Added section on EMC
Misc corrections
3.2 2018-05-25 Corrected pinnings for 8-bit parallel
Misc corrections
3.3 2018-10-23 Minor corrections
3.4 2019-02-27 Updated for CANopen release
Rebranded
Anybus®CompactCom B40-1 Design Guide HMSI-27-230 3.4 en-US

Preface 4 (78)
1.4 Document Conventions
Ordered lists are used for instructions that must be carried out in sequence:
1. First do this
2. Then do this
Unordered (bulleted) lists are used for:
• Itemized information
• Instructions that can be carried out in any order
...and for action-result type instructions:
►This action...
→ leads to this result
Bold typeface indicates interactive parts such as connectors and switches on the hardware, or
menus and buttons in a graphical user interface.
Monospaced text is used to indicate program code and other
kinds of data input/output such as configuration scripts.
This is a cross-reference within this document: Document Conventions, p. 4
This is an external link (URL): www.hms-networks.com
This is additional information which may facilitate installation and/or operation.
This instruction must be followed to avoid a risk of reduced functionality and/or damage
to the equipment, or to avoid a network security risk.
Caution
This instruction must be followed to avoid a risk of personal injury.
WARNING
This instruction must be followed to avoid a risk of death or serious injury.
1.5 Document Specific Conventions
• The terms “Anybus” or “module” refers to the Anybus CompactCom module.
• The terms “host” or “host application” refer to the device that hosts the Anybus.
• Hexadecimal values are written in the format NNNNh or 0xNNNN, where NNNN is the
hexadecimal value.
• A byte always consists of 8 bits.
• All dimensions in this document have a tolerance of ±0.10 mm unless otherwise stated.
• Outputs are TTL compliant unless otherwise stated.
• Signals which are “pulled to GND” are connected to GND via a resistor.
• Signals which are “pulled to 3V3” are connected to 3V3 via a resistor.
• Signals which are “tied to GND” are directly connected to GND,
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Preface 5 (78)
• Signals which are “tied to 3V3” are directly connected to 3V3.
1.5.1 PIN Types
The pin types of the connectors are defined in the table below. The pin type may be different
depending on which mode is used.
Pin type Definition
I Input
O Output
I/O Input/Output (bidirectional)
OD Open Drain
Power Pin connected directly to module power supply, GND or 3V3
1.6 Trademark Information
Anybus®is a registered trademark of HMS Industrial Networks.
EtherCAT®is a registered trademark and patented technology, licensed by Beckhoff Automation
GmbH, Germany.
All other trademarks are the property of their respective holders.
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About the Anybus CompactCom B40-1 6 (78)
2 About the Anybus CompactCom B40-1
2.1 General Information
The Anybus CompactCom B40-1 concept is developed for applications where the standard
Anybus CompactCom M40 cannot be used. The brick consists of a board with network
connectivity functionality, where the customer provides the physical network interface, including
network connectors. There are also available interface boards for several networks, providing
network connectors and physical interface.
All Anybus CompactCom B40-1 share footprint and electrical interface. The brick has two
connectors that provides communication with the host application board. The host application
connector provides an interface between the host application and the brick, while the network
connector provides network access. This enables full Anybus CompactCom functionality for all
applications without loss of network compatibility or environmental characteristics.
All dimensions expressed in this document are stated in millimeters and have a tolerance of
±0.10 mm unless stated otherwise.
For general information about the Anybus CompactCom 40 platform, consult the Anybus
CompactCom 40 Software Design Guide.
This a class A product. In a domestic environment, this product may cause radio
interference in which case the user may be required to take adequate measures.
This product contains ESD (Electrostatic Discharge) sensitive parts that may be damaged if
ESD control procedures are not followed. Static control precautions are required when
handling the product. Failure to observe this may cause damage to the product.
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About the Anybus CompactCom B40-1 7 (78)
2.2 Features
• Hardware support for triple buffered process data, which increases performance
• Supports synchronization for selected industrial networks
• Black channel interface, offering a transparent channel for safety communication for
selected networks
• Low latency
• Integrated protocol stack handling (where applicable)
• Control pins for status indications according to each network standard (where applicable)
• Separate network connector boards available
• Firmware upgradable (FLASH technology)
• 3.3 V design
• 8-bit and 16-bit parallel modes
• SPI mode
• Shift register mode
• UART/Serial mode
• Transparent Ethernet functionality
• Precompliance tested for network conformance (where applicable).
• Precompliance tested for CE & UL. Contact HMS Industrial Networks for further information.
All Anybus CompactCom B40-1 will be precertified for network conformance. This is done
to ensure that the final product can be certified, but it does not necessarily mean that the
final product does not require recertification. Contact HMS Industrial Networks for
further information.
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Host Interface 8 (78)
3 Host Interface
This chapter describes the low level properties of the Anybus CompactCom interface.
3.1 Overview
The Anybus CompactCom has five different host communication interfaces, corresponding to
different operating modes. The figure below illustrates the basic properties of these interfaces as
well as various I/O and control signals, and how they relate to the host application.
Host
CPU
Flash
Parallel Interface,
8-bit or 16-bit
Serial Interface
LED I/F
or RMII
RAM
A0 ... A13
Tx
Rx
LED[1A, 1B, 2A, 2B]
LED[3A, 3B, 4A, 4B]
RESET
OM[0...3]
MI[0...1]
MD
D0 ... D7
CS
OE
WE
IRQ
Physical Interface
Anybus
CPU
Network
Communications Controller
SPI
Shift Registers
SS
SCLK
MISO
MOSI
LD
SCLK
DO
DI
CT
PA
DIP1[0...7]
DIP2[0...7]
IRQ
D8 ... D15
Fig. 1
Please note that only one communication interface at a time is available. Which one is decided
at startup.
3.1.1 Parallel Interface, 8-bit or 16-bit
From an external point of view, the parallel interface is a common 8-bit or 16-bit parallel slave
port interface, which can easily be incorporated into any microprocessor based system that has
an external address/data bus. Generally, implementing this type of interface is comparable to
implementing an 8-bit or 16-bit wide SRAM. Additionally, the parallel interface features an
interrupt request line, allowing the host application to service the module only when actually
needed.
3.1.2 SPI
The Serial Peripheral Interface (SPI) is a synchronous serial link. It operates in full duplex mode
and devices communicate in master/slave mode where the Anybus CompactCom modules
always act as slaves. The interface can provide much higher performance than the serial
interface, but not as high as the parallel interface.
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Host Interface 9 (78)
3.1.3 Stand-Alone Shift Register Interface
In this mode the Anybus CompactCom B40-1 operates stand-alone, with no host processor.
Process data is communicated to the shift registers on the host.
3.1.4 Serial Interface (UART)
The serial interface is provided for backward compatibility with the Anybus CompactCom 30. The
interface is event based, and has lower performance than the SPI and parallel modes. For more
information about the serial interface, see the Anybus CompactCom Hardware Design Guide for
the 30 series.
Please note that the Anybus CompactCom B40-1 is not backward compatible to the Anybus
CompactCom B30 hardware wise.
3.1.5 LED Interface
The status of the network LEDs is available as follows:
• As LED output signals on the network interface connector. These signals are able to drive a
LED directly and are available for all networks and operating modes. (Recommended)
• As LED output signals on the host interface connector for all operating modes except 16-bit
parallel mode. These signals are not able to drive a LED directly.
• In the LED status register for all modes, see Anybus CompactCom 40 Software Design guide
for more information.
3.1.6 Reduced Media-Independent Interface (RMII)
This interface is used for Transparent Ethernet, where Industrial Ethernet communication is
handled by the Anybus CompactCom and other Ethernet communication is routed to the host
application. 16–bit parallel mode and the LED Interface signals are not available in the host
application connector when Transparent Ethernet is enabled. The LED signals are still available
on the network connector of the Anybus CompactCom B40-1.
See RMII — Reduced Media-Independent Interface, p. 17 for mor information.
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Host Interface 10 (78)
3.2 Host Application Connector
The host application connector provides an interface between the host application and the
Anybus CompactCom B40-1.
Pin 1
Application
interface
Pin 1
Network
interface
Outline of brick
Top view
Fig. 2
The connector is implemented by a standard 1.27 mm 56 pin header surface mounted to the
bottom side of the PCB.
1
256
55
Top view
Fig. 3
The pictures shows the pinning of the mating connector on the host application seen from the
top.
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Host Interface 11 (78)
GND2  13V3
A0/WEH/DIP1_04  3RESET
A2/DIP1_26  5A1/DIP1_1
GND8  7A3/DIP1_3
A5/DIP1_510   9A4/DIP1_4
A7/DIP1_712   11 A6/DIP1_6
GND14   13 A8/LD/SS
A10/DO/MISO16   15 A9/SCLK
GND18   17 A11/DI/MOSI
A13/ASI_TX20   19 A12/ASI_RX
D6/DIP2_622   21 D7/DIP2_7
GND24   23 D5/DIP2_5
D3/DIP2_326   25 D4/DIP2_4
GND28   27 D2/DIP2_2
MD0 30   29 D1/DIP2_1
OM032   31 D0/DIP2_0
GND34   33 OM1
CS 36   35 OM2
IRQ/PA38   37 WE/WEL/CT
GND40   39 OE
LED4B/D1442   41 LED4A/D15
GND44   43 LED3A/D13
LED2A/D1146   45 LED3B/D12
LED1A/D948   47 LED2B/D10
GND50   49 LED1B/D8
TX/ASI_TX/OM352   51 RX/ASI_RX
MI0/SYNC54   53 MI1
GND56   55 3V3
Fig. 4
See Pin Overview, p. 12 for information on how each pin is used in the different modes.
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Host Interface 12 (78)
3.2.1 Pin Overview
Depending on operating mode, the pins have different names and different functionality.
Presented below is an overview of all pins except GND and 3V3.
The pin types of the connector are defined in PIN Types, p. 5. The pin type may be different
depending on which mode is used.
The ASI (Anybus Safety Interface) signals are used to connect a safety module to the safety interface of
an Anybus CompactCom 40-series module.
Note: The pin numbers of the Anybus CompactCom B40 (brick) host application
connector are different from those of the Anybus CompactCom M40 (module) host
application connector.
Pin Signal Name Type Notes
Serial
Mode
SPI Mode 8-bit
Mode
16-bit
Mode
Shift
Register
Mode
4 DIP1_0 DIP1_0 A0 WEH DIP1_0 I
5 DIP1_1 DIP1_1 A1 A1 DIP1_1 I
6 DIP1_2 DIP1_2 A2 A2 DIP1_2 I
7 DIP1_3 DIP1_3 A3 A3 DIP1_3 I
9 DIP1_4 DIP1_4 A4 A4 DIP1_4 I
10 DIP1_5 DIP1_5 A5 A5 DIP1_5 I
11 DIP1_6 DIP1_6 A6 A6 DIP1_6 I
12 DIP1_7 DIP1_7 A7 A7 DIP1_7 I
13 SS A8 A8 LD I/O
15 SCLK A9 A9 SCLK O, I
16 MISO A10 A10 DO O, I
17 MOSI A11 A11 DI I
19 ASI RX A12 A12 I
20 ASI TX A13 A13 O, I
31 DIP2_0 DIP2_0 D0 D0 DIP2_0 I, I/O
29 DIP2_1 DIP2_1 D1 D1 DIP2_1 I, I/O
27 DIP2_2 DIP2_2 D2 D2 DIP2_2 I, I/O
26 DIP2_3 DIP2_3 D3 D3 DIP2_3 I, I/O
25 DIP2_4 DIP2_4 D4 D4 DIP2_4 I, I/O
23 DIP2_5 DIP2_5 D5 D5 DIP2_5 I, I/O
22 DIP2_6 DIP2_6 D6 D6 DIP2_6 I, I/O
21 DIP2_7 DIP2_7 D7 D7 DIP2_7 I, I/O
49 LED1B LED1B LED1B D8 LED1B O, I/O In modules supporting RMII,
these pins are used for the RMII
interface when this has been
activated, see RMII — Reduced
Media-Independent Interface, p.
17.
48 LED1A LED1A LED1A D9 LED1A O, I/O
47 LED2B LED2B LED2B D10 LED2B O, I/O
46 LED2A LED2A LED2A D11 LED2A O, I/O
45 LED3B LED3B LED3B D12 LED3B OD, I/O
43 LED3A LED3A LED3A D13 LED3A OD, I/O
42 LED4B LED4B LED4B D14 LED4B O, I/O
41 LED4A LED4A LED4A D15 LED4A O, I/O
37 WE WEL CT I
39 OE OE I
36 CS CS I
38 IRQ IRQ IRQ PA O
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Host Interface 13 (78)
Pin Signal Name Type Notes
Serial
Mode
SPI Mode 8-bit
Mode
16-bit
Mode
Shift
Register
Mode
51 RX ASI RX ASI RX ASI RX ASI RX I
52 TX / OM3 ASI TX /
OM3
ASI TX /
OM3
ASI TX /
OM3
ASI TX /
OM3
I/O Strapping input with internal
weak pull-up during powerup.
To configure OM3, use an
external pull-up/pull-down of
1.0 to 2.2 kΩ. The pin changes to
output after powerup
32 OM0 OM0 OM0 OM0 OM0 I
33 OM1 OM1 OM1 OM1 OM1 I
35 OM2 OM2 OM2 OM2 OM2 I
54 MI0 MI0/SYNC MI0/SYNC MI0/SYNC MI0/SYNC OLow at power-up and before
reset release.
53 MI1 MI1 MI1 MI1 MI1 O Tied to 3V
30 MD0 MD0 MD0 MD0 MD0 O Tied to GND
3 RESET RESET RESET RESET RESET I
3.2.2 Power Supply Pins
Signal Type Pin Description
GND Power 2, 8, 14, 18, 24,
28, 34, 40, 44,
50, 56
Ground
Power and signal ground reference.
3V3 Power 1, 55 3.3 V power supply.
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Host Interface 14 (78)
3.2.3 LED Interface / D8–D15 (Data Bus)
Signal Name Pin Type Pin Description, LED Interface Description, Data Bus
LED1A / D9 O / I/O 48 LED 1 Indication A
• Green
D9 Data Bus
• "D9" in 16-bit parallel
mode.
LED1B / D8 O / I/O 49 LED 1 Indication B
• Red
D8 Data Bus
• "D8" in 16-bit parallel
mode.
LED2A / D11 O / I/O 46 LED 2 Indication A
• Green
D11 Data Bus
• "D11" in 16-bit parallel
mode.
LED2B / D10 O / I/O 47 LED 2 Indication B
• Red
D10 Data Bus
• "D10" in 16-bit parallel
mode.
LED3A / D13 OD / I/O 43 LED 3 Indication A
• Green
• Mainly used for link/
activity on network port 1
on the Ethernet modules.
Pin is open-drain to maintain
backward compatibility with
existing applications, where this
pin may be tied to GND.
D13 Data Bus
• "D13" in 16-bit parallel
mode.
LED3B / D12 OD / I/O 45 LED 3 Indication B
• Yellow or red, depending
on network
• Mainly used for link/
activity on network port 1
on the Ethernet modules
(yellow).
Pin is open-drain to maintain
backward compatibility with
existing applications, where this
pin may be tied to GND.
D12 Data Bus
• "D12" in 16-bit parallel
mode.
LED4A / D15 O / I/O 41 LED 4 Indication A
• Green
• Mainly used for link/
activity on network port 2
on the Ethernet modules.
D15 Data Bus
• "D15" in 16-bit parallel
mode.
LED4B / D14 O / I/O 42 LED 4 Indication B
• Yellow or red, depending
on network
• Mainly used for link/
activity on network port 2
on the Ethernet modules
(yellow)
D14 Data Bus
• "D14" in 16-bit parallel
mode.
The LED signals are also available on the network connector as active high push/pull signals. Those
signals are easier to use for LEDs.
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Host Interface 15 (78)
3.2.4 Settings / Sync
Signal Name Type Pin Description
OM0
OM1
OM2
OM3 (ASI TX) (TX)
I
I
I
I (Used as OM3
during power up)
32
33
35
52
Operating Mode
Used to select interface and baud rate, see below.
MI0 / SYNC
MI1
O
O
54
53
Module Identification
MI0 and MI1 can be used by the host application to determine
what type of Anybus CompactCom that is connected.
SYNC
On networks that support synchronous communication, a
periodic synchronization pulse is provided on the SYNC output.
The SYNC pulse is also available as a maskable interrupt using the
IRQ signal.
MD0 O 30 Module Detection
This signal can be used by the host application to determine that
an Anybus CompactCom is inserted into the slot, see Module
Detection, p. 16.
The signal is connected directly to GND on the Anybus
CompactCom.
ASI RX
ASI TX
I
O
51
52
UART
opera-
tion:
19
20
Black Channel Communication
These signals can be connected to a safety module, e.g. to IXXAT
Safe T100 to provide a safe channel for black channel
communication
If not used, pin 51 (for UART operation pin 19) should be pulled
to 3V3.
RX
TX
I
O
51
52
Serial Communications Signals
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Host Interface 16 (78)
Operating Modes
These inputs select the interface that should be used to exchange data (SPI, stand-alone shift
register, parallel or serial) and, if the serial interface option is used, the operating baud rate. The
state of these signals is sampled once during startup, i.e. any changes require a reset in order to
have effect.
OM3 OM2 OM1 OM0 Operating Mode
LOW LOW LOW LOW Reserved
LOW LOW LOW HIGH SPI
LOW LOW HIGH LOW Stand-alone shift register
LOW LOW HIGH HIGH Reserved
LOW HIGH LOW LOW Reserved
LOW HIGH LOW HIGH Reserved
LOW HIGH HIGH LOW Reserved
LOW HIGH HIGH HIGH 16-bit parallel
HIGH LOW LOW LOW 8-bit parallel
HIGH LOW LOW HIGH Serial 19.2 kbps
HIGH LOW HIGH LOW Serial 57.6 kbps
HIGH LOW HIGH HIGH Serial 115.2 kbps
HIGH HIGH LOW LOW Serial 625 kbps
HIGH HIGH LOW HIGH Reserved
HIGH HIGH HIGH LOW Reserved
HIGH HIGH HIGH HIGH Service Mode
LOW = VIL
HIGH = VIH
These signals must be stable prior to releasing the RESET signal. Failure to observe this may result in
faulty behavior.
Module Detection
This signal is internally connected to GND, and can be used by the host application to detect
whether a module is present or not. When connecting an external pull-up resistor, a low signal
indicates that a module is present.
If not used, leave this signal unconnected.
Module Identification
These signals indicate which type of module that is connected. It is recommended to check the
state of these signals before accessing the module.
MI1 MI0 Module Type
LOW LOW Active Anybus CompactCom 30
LOW HIGH Passive Anybus CompactCom
HIGH LOW Active Anybus CompactCom 40
HIGH HIGH Customer specific
LOW = VOL
HIGH = VOH
On modules supporting “SYNC”, MI0 is used as a SYNC signal during operation. MI0 should only be
sampled by the application during the time period from power up to the end of SETUP state.
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Host Interface 17 (78)
3.2.5 RMII — Reduced Media-Independent Interface
In RMII enabled modules, the pins described in the table below are used for the RMII
communication. They are set to tristate during startup, making it impossilbe to indicate e.g.
exception during setup. When setup is complete, they are set to inputs/outputs according to the
selected mode. See Anybus CompactCom 40 Software Design Guide for more information on
mode selection.
The 16-bit parallel mode can not be used when RMII is enabled
LED status will not be available when RMII is enabled.
Pin Signal Name Type Notes
49 RXD0 O -
48 RXD1 O -
47 RXDV O -
46 I Not used (connect to external pull-down)
45 TXD0 I -
43 TXD1 I -
42 TXEN I -
41 CLK I -
3.2.6 IRQ (Interrupt Request)
Signal Name Pin Type Pin Description
IRQ O 38 Interrupt Request
Active low interrupt signal.
The use of this signal is optional but highly recommended. Even if the host application lacks
interrupt capabilities, it is recommended to connect this signal to an input port to simplify
software design.
This signal must be pulled to 3V3 on the host application side to prevent spurious interrupts
during startup.
Anybus®CompactCom B40-1 Design Guide HMSI-27-230 3.4 en-US

Host Interface 18 (78)
3.2.7 RESET (Reset Input)
Signal Name Pin Type Pin Description
RESET I 3 Reset
Used to reset the module.
The master reset input is active low. It must be connected to a host application controllable
output pin in order to handle the power up sequence, voltage deviations and to be able to
support network reset requests. If the brick is used in stand-alone mode, with no host processor,
a separate reset circuit can be used, see Reset Circuit Example, p. 36.
The brick does not feature any internal reset regulation. To establish a reliable interface, the host
application is solely responsible for resetting the module when the supply voltage is outside the
specified range.
Power Up
Power
/RESET
0V
3.3V
Power
On
Power
Stable
tB
tA
VIL
VIH
t
t
Fig. 5
Powerup time limits are given in the table below:
Symbol Min. Max. Definition
tA- - Time until the power supply is stable after power-on; the duration depends
on the power supply design of the host application and is thus beyond the
scope of this document.
tB1 ms -Safety margin.
Anybus®CompactCom B40-1 Design Guide HMSI-27-230 3.4 en-US