20G204-00 E1 User Manual
Contents
1. damages and expenses and reasonable attorney fees arising out of directly or indirectly any claim or personal injury or death associated with such unintended or unauthorized use even if such claim alleges that MEN was negligent regarding the design or manufacture of the part In no case is MEN liable for the correct function of the technical installation where MEN products are a part of Trademarks All products or services mentioned in this publication are identified by the trademarks service marks or product names as designated by the companies which market those products The trademarks and registered trademarks are held by the companies producing them Inquiries concerning such trademarks should be made directly to those companies Conformity MEN products are no ready made products for end users They are tested according to the standards given in the Technical Data and thus enable you to achieve certification of the product according to the standards applicable in your field of application MEN Mikro Elektronik GmbH 8 20G204 00 E1 2013 11 28 About this Document RoHS Since July 1 2006 all MEN standard products comply with RoHS legislation Since January 2005 the SMD and manual soldering processes at MEN have already been completely lead free Between June 2004 and June 30 2006 MEN s selected component suppliers have changed delivery to RoHS compliant parts During this period any change and status was traceable through2. A04 GND D19 6 A05 DREQ D20 7 A06 DACK 021 8 A07 GND D22 ED 9 D08 Doo TRIGA 8 8 10 Dog Dot TRIGB 4 D10 D02 D23 aaj 12 011 24 _ 13 012 004 025 013 005 026 E 15 D14 206 027 16 D15 007 028 a 8 17 0 51 DSO 29 48 DTACK D30 19 IRQ D31 20 RESET SYSCLK DS2 Table 2 Signal mnemonics of the M Module connector Name Direction Function 000 031 in out Data bus A01 A07 out Address bus WRITE out Write enable CS out M Module chip select DTACK in Data transfer acknowledge out Address strobe 050 2 out Data strobe RESET out M Module reset IRQ in Interrupt request NACK out Interrupt acknowledge DREQ in DMA request DACK out DMA acknowledge SYSCLK out 16 MHz clock GND Logical reference signal 5V 12V 12V out Power supplies TRIGA TRIGB in out MEN Mikro Elektronik GmbH 20G204 00 E1 2013 11 28 Functional Description 2 2 2 Installing an M Module Perform the following steps to install an M Module Loosen the two mounting screws of the D Sub front panel see picture below and remove the whole D Sub front panel If the M Module has a plastic cover remove the cover from the M Module before installing the M Module on the G204 For removing the cover unscrew the four screws as marked in the picture below After removing the c
3. Register OxO1FF FF08 OxO1FF FFOB Trigger Source Register OxO1FF FFOC FFOF Trigger Destination Register MEN Mikro Elektronik GmbH 20G204 00 E1 2013 11 28 Appendix 4 Appendix 4 1 Configuration The G204 has the following IDs on the PCI bus PCI Device ID 0x203D PCI Vendor ID 0x1172 Subsystem Device ID 0x5A91 Subsystem Vendor ID 0x00B9 42 Literature and Web Resources G204 data sheet with up to date information and documentation www men de products 02G204 html M Module Standard ANSI VITA 12 1996 M Module Specification VMEbus International Trade Association www vita com PCI Special Interest Group www pcisig com CompactPCI Serial Specification PICMG CPCI S 0 Revision 1 0 2011 PCI Industrial Computers Manufacturers Group PICMG www picmg org Introduction to CompactPCI Serial on Wikipedia en wikipedia org wiki CompactPCI Serial 4 3 Finding out the Product s Article Number Revision and Serial Number MEN user documentation may describe several different models and or design revisions of the G204 You can find information on the article number the design revision and the serial number on a label attached to the board Article number Gives the product s family and model This is also MEN s ordering number To be complete it must have 9 characters Revision number Gives the design revision of the product Serial number Unique identification assigned duri
4. latest information online IRQ Signal names followed or preceded by a slash indicate that this signal is IRQ either active low or that it becomes active at a falling edge in out Signal directions in signal mnemonics tables generally refer to the corresponding board or component in meaning to the board or component out meaning coming from it Vertical lines on the outer margin signal technical changes to the previous issue of the document MEN Mikro Elektronik GmbH 7 20G204 00 2013 11 28 About this Document Legal Information Changes MEN Mikro Elektronik GmbH MEN reserves the right to make changes without further notice to any products herein Warranty Guarantee Liability MEN makes no warranty representation or guarantee of any kind regarding the suitability of its products for any particular purpose nor does MEN assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability including without limitation consequential or incidental damages TO THE EXTENT APPLICABLE SPECIFICALLY EXCLUDED ARE ANY IMPLIED WARRANTIES ARISING BY OPERATION OF LAW CUSTOM OR USAGE INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE OR USE In no event shall MEN be liable for more than the contract price for the products in question If buyer does not notify MEN in writing within the foregoin
5. the MEN ERP system and the boards gradually became RoHS compliant WEEE Application The WEEE directive does not apply to fixed industrial plants and tools The compliance is the responsibility of the company which puts the product on the market as defined in the directive components and sub assemblies are not subject to product compliance In other words Since MEN does not deliver ready made products to end users the WEEE directive is not applicable for MEN Users are nevertheless recommended to properly recycle all electronic boards which have passed their life cycle Nevertheless MEN is registered as a manufacturer in Germany The registration number can be provided on request Copyright 2013 MEN Mikro Elektronik GmbH rights reserved Germany France USA MEN Mikro Elektronik GmbH MEN Mikro Elektronik SA MEN Micro Inc Neuwieder StraBe 3 7 18 rue Ren Cassin 860 Penllyn Blue Bell Pike 90411 Nuremberg ZA de la Chatelaine Blue Bell PA 19422 Phone 49 911 99 33 5 0 74240 Gaillard Phone 215 542 9575 Fax 49 911 99 33 5 901 E mail info men de www men de MEN Mikro Elektronik GmbH 20G204 00 E1 2013 11 28 Phone 33 0 450 955 312 Fax 33 0 450 955 211 E mail info men france fr www men france fr Fax 215 542 9577 E mail sales menmicro com www menmicro com Contents Contents 1 Getting Started exer Ecos Y ERO E KENN pM eis 12 LI MapOrthe Board oda autas t Sarasa bg aou tuto doe
6. 20G204 00 E1 2013 11 28 G204 3U CompactPCle amp Serial M Module Carrier Board Aen G204 3U Serial M Module Carrier Board G204 3U Serial M Module Carrier Board The G204 15 M Module carrier board for universal I O on the CompactPCI Serial bus It allows high flexibility in applications such as data acquisition or process control One M Module may be installed on the G204 which needs only one slot on the CompactPCI Serial bus M Modules are screwed tightly on the board and require no separately mounted transition panel The G204 offers developers instant access to more than 70 different M Modules for I O in fields such as process I O measurement instrumentation motion control communication and development Diagram Front connector Rear I O connector Onboard connector M Module interface O M Module slot PCle to local bus CompactPCI bridge Serial connector FPGA MEN Mikro Elektronik GmbH 2 20G204 00 E1 2013 11 28 Technical Data Technical Data M Module Slots One M Module slot Compliant with M Module standard e Characteristics A08 A24 D08 D16 032 INTA TRIGI TRIGO Peripheral Connections Via front panel CompactPCI Serial Compliance with CompactPCI Serial PICMG CPCI S 0 Specification Peripheral slot e 32 bit 33 MHz PCIeG to M Module M bridge FPG
7. A based Target on PCIe bus Electrical Specifications Supply voltage power consumption 12 V 5 5 100 mA typ without M Module Mechanical Specifications Dimensions conforming to CompactPCI Serial specification for 3U boards Front panel 4HP with ejector cut out for front connector of M Module Weight approx 130 g without M Modules Environmental Specifications Temperature range operation 40 85 qualified components Airflow min 1 0 m s e Temperature range storage 40 85 C Relative humidity operation max 95 non condensing Relative humidity storage max 95 non condensing Altitude 300 m to 3000 m Shock 50 m s 30 ms EN 61373 Vibration function 1 m s 5 Hz 150 Hz EN 61373 e Vibration lifetime 7 9 m s 5 Hz 150 Hz EN 61373 Conformal coating on request MTBF 2 177 300 h 40 C according to IEC TR 62380 RDF 2000 MEN Mikro Elektronik GmbH 3 20G204 00 E1 2013 11 28 Technical Data Safety Flammability PCB manufactured with a flammability rating of 94V 0 by UL recognized manufacturers EMC Conformity EN 55022 radio disturbance TEC 61000 4 2 ESD IEC 61000 4 3 electromagnetic field immunity IEC 61000 4 6 conducted disturbances Software Support M Module drivers for Windows VxWorks Linux QNX OS 9 as supported Basic board driver included in MDIS system packa
8. Advanced Error Capabilities and Control Register 0x81C Header Log Register 0x82C Notused 0x830 0x834 Error Source Identification Register Correctable Error Source ID Register 0x838 Reserved OXF FF MEN Mikro Elektronik GmbH 26 20G204 00 E1 2013 11 28 3 2 Organization of the Board M Module Slot Address Spaces The G204 uses a 32 MB address space It provides the whole address space of the M Module for A24 access as well as for A8 access see also Chapter 2 2 M Module Interface page 15 The base address within the PCIe address space is set by the corresponding base address registers in the PCIe configuration space The G204 address spaces is divided into five distinct areas One area for A24 D32 access cycles One area for A24 D16 access cycles One area for A08 D32 access cycles One area for A08 D16 access cycles One area for accesses to additional control registers Table 5 M Module address map Offset Address Range Function 0x0000 0000 OxOOFF FFFF M Module access 24 bit address width and 32 bit data width 0x0100 0000 OxO1FF FCFF M Module access 24 bit address width and 16 bit data width OxO1FF FDOO OxO1FF FDFF M Module access 8 bit address width and 32 bit data width OxO1FF FEFF M Module access 8 bit address width and 16 bit data width OxO1FF FFOO OxO1FF FFO3 IACK Register OxO1FF FFO4 OxOlFF 7 Control Status
9. Management Status and Control Control Status Bridge Extensions 0x80 PCIe Capabilities Register Next Capabilities PCIe Capability ID Pointer 0x84 Device Capabilities 0x88 Device Status Device Control 0x8C Link Capabilities 0x90 Link Status Link Control 0x94 Slot Capabilities 0x98 Slot Status Slot Control 0x9C Not used OxB8 OxBC Reserved OxFC 0x094 Not used OxOFF 0x100 Virtual Channel Capability Structure 0 16 0x170 Reserved 0 17 0x180 Virtual Channel Arbitration Table Ox1FC 0x200 Port VCO Arbitration Table Reserved 0x23C 0x240 Port VC1 Arbitration Table Reserved 0x27C 0x280 Port VC2 Arbitration Table Reserved Ox2BC 0 2 0 Port Arbitration Table Reserved Ox2FC 0 300 Port VC4 Arbitration Table Reserved 0x33C 0x340 Port VC5 Arbitration Table Reserved 0x37C 0x380 Port VC6 Arbitration Table Reserved Ox3BC MEN Mikro Elektronik GmbH 25 20G204 00 E1 2013 11 28 Organization of the Board Address D31 D24 D23 D16 D15 D8 07 00 0x3C0 Port VC7 Arbitration Table Reserved Ox3FC 0x400 Reserved Ox7FC 0x800 PCle Enhanced Capability Header 0x834 0 804 Uncorrectable Error Status Register 0x808 Uncorrectable Error Mask Register 0x80C Uncorrectable Error Severity Register 0x810 Correctable Error Status Register 0x814 Correctable Error Mask Register 0x818
10. ad only 1 Interrupt pending Timeout 1 Timeout occurred Write 1 to clear Interrupt enable bit 0 Disable interrupt 1 Enable interrupt Interrupt pending read only 1 Interrupt pending Functional Description 2 3 Using Triggers There are 8 internal trigger lines the internal trigger bus Every M Module trigger line TRIGA TRIGB can be driven by and can drive every internal trigger line If there is more than one source for an internal trigger all connected sources are ORed There is one Trigger Source Register read write and one Trigger Destination Register read write Bits 31 16 of the Trigger Source and Trigger Destination Registers are global The maximum propagation delay between a trigger source and trigger destination amounts to 25 ns Figure 3 Trigger routing Internal Trigger Bus 6 5 4 3 2 1 0 M Module Bits 15 8 TRIGBSource 2 10 TRIGB Destination TRIGA Destination L Is 5 3 2 1 0 TRIGASouce Bits 7 0 MEN Mikro Elektronik GmbH 20 20G204 00 2013 11 28 Functional Description Figure 4 Trigger routing examples Internal Trigger Bus 7 6 5 4 3 MEN Mikro Elektronik GmbH 20G204 00 E1 2013 11 28 0 M Module Bits 15 8 TRIGB Source 1 5 32 TRIGB Destination TRIGA Destination Jafo e fic ei
11. aes 12 1 2 Integrating the Board into a System 13 1 3 Installing Driver Sottware cvs deoa EURO RORIS 14 2 Functional Description ee 15 2 1 Power Supply donee qoe b acelin 15 2 2 M Module Intertace 15 2 2 1 MsModule Connector ium soo hee 15 2 2 2 dnstalline M Module per sated 17 2 2 3 Configuring the M Module Interface 19 2 20 2A CompactPCI Serial Interface 22 og d 23 3 Organization of the Board else 24 3 1 PCle Configuration ReglsterS peste anew hoa PUES bre 24 3 1 1 Address iss 9r RR RR 24 3 2 M Module Slot Address Spaces 27 4 ApperndiX eem e 28 4 1 PCI Configuration eer eins cade RR RES 28 4 2 Literature and Web R sOUtCes oso eer Re 28 4 3 Finding out the Product s Article Number Revision and Serial Nuimbet iiu oos dtr RR POP pape UR dedere 28 MEN Mikro Elektronik GmbH 10 20G204 00 E1 2013 11 28 Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Tables Table 1 Table 2 Table 3 Table 4 Table 5 MEN Mikro Elektronik GmbH 20G204 00 E1 2013 11 28 the board 1op wate 12 Map of the board front eee 13 TTEIS OE TOWNE i
12. con bc coerce RSEN OR E GOMA ERU EROR AG 20 Trigger routing examples rere n ee 21 Labels giving the product s article number revision and 28 Pin assignment of the 60 pin plug connectors 16 Signal mnemonics of the M Module connector 16 Pin assignment of CompactPCI Serial P1 connector 23 PCI contiguration Teglstets ses dug orem ah n es tee ed 24 M Module addiess map 5 23 eo quii 27 11 Getting Started 1 Getting Started This chapter gives an overview of the board and some hints for first installation in a system 1 1 Map of the Board Figure 1 Map of the board top view M Module D Sub connector front panel M Module mounting screws CompactPCI Serial connector MEN Mikro Elektronik GmbH 12 20G204 00 E1 2013 11 28 Getting Started 1 2 Integrating the Board into a System You can use the following check list when installing the board in a system for the first time and with minimum configuration Power down the system Install an M Module on the G204 as described in Chapter 2 2 2 Installing an M Module on page 17 Insert the G204 into a peripheral slot of your CompactPCI system making sure that the CompactPCI connectors are properly aligned Note The peripheral slots of every CompactPCI Serial system are marked by a circle with a plus sign behind it on the backpla
13. ea TRIGA Source Bits 7 0 Trigger Source Register read write Functional Description 31 24 23 16 Reserved 15 8 7 0 M Module Source TRIGB 7 0 M Module Source TRIGA 7 0 M Module Source TRIGB 1 Trigger input TRIGB is connected to the corresponding internal trigger line 7 0 M Module Source TRIGA 1 Trigger input TRIGA is connected to the corresponding internal trigger line 7 0 Trigger Destination Register read write 31 24 23 16 Reserved 15 8 7 0 M Module Destination TRIGB 7 0 M Module Destination TRIGA 7 0 M Module Destination TRIGB The corresponding internal trigger line is connected to TRIGB This TRIGB line becomes an output and no longer an input line M Module Destination TRIGA 1 The corresponding internal trigger line is connected to TRIGA This TRIGA line becomes an output and no longer an input line Note It is not forbidden but may make no sense to activate a trigger line as an out put and use this line as an input as well Take care not to cause loops Using TRIGA as an input connected to internal line 0 and activating TRIGA as an output as well might cause heavy oscillation or any other non deterministic behavior MEN Mikro Elektronik GmbH 20G204 00 E1 2013 11 28 Functional Description 2 4 CompactPCI Serial Interface The G204 uses one PCI Express x4 link at t
14. ers Address D31 D24 D23 D16 D15 D8 D7 DO 0x00 Device ID 0x203D Vendor ID 0x1172 0x04 Status 0x0400 Command 0x0007 0x08 Class Code 0x068000 Revision ID 0x4 0x0C BIST 0x00 Header Type 0x00 Latency Timer Cache Line Size 0x00 0x10 PCI Base Address 0 BARO for Memory Mapped FPGA Registers 0x14 PCI Base Address 1 BAR1 for Memory Mapped FPGA Registers 0x18 PCI Base Address 2 Not used Ox1C Base Address 3 Not used 0x20 Base Address 4 Not used 0x24 PCI Base Address 5 Not used 0x28 Reserved 0x2C Subsystem ID 0x5A91 Subsystem Vendor ID 0x00B9 0x30 Expansion ROM Register Not used 0x34 Reserved Capabilities Pointer 0x38 Reserved 0x3C Max Lat 0x00 Min Gnt 0x00 Interrupt Pin 0x01 Interrupt Line 0x40 Reserved 0 4 0 50 Message Control MSI Next Capabilities Capability ID Pointer 0x54 Message Address 0x58 Message Upper Address Not used 0x5C Reserved Message Data 0x68 Not used 0x70 MEN Mikro Elektronik GmbH 20G204 00 2013 11 28 Organization of the Board Address D31 D24 D23 D16 D15 D8 07 00 0 70 Reserved 0x74 0x78 Power Management Capabilities Register Next Capabilities Capability ID Pointer 0x7C Data Power Management Power
15. g warranty period MEN shall have no liability or obligation to buyer hereunder The publication is provided on the terms and understanding that 1 MEN is not responsible for the results of any actions taken on the basis of information in the publication nor for any error in or omission from the publication and 2 MEN is not engaged in rendering technical or other advice or services MEN expressly disclaims all and any liability and responsibility to any person whether a reader of the publication or not in respect of anything and of the consequences of anything done or omitted to be done by any such person in reliance whether wholly or partially on the whole or any part of the contents of the publication Conditions for Use Field of Application The correct function of MEN products in mission critical and life critical applications is limited to the environmental specification given for each product in the technical user manual The correct function of MEN products under extended environmental conditions is limited to the individual requirement specification and subsequent validation documents for each product for the applicable use case and has to be agreed upon in writing by MEN and the customer Should the customer purchase or use MEN products for any unintended or unauthorized application the customer shall indemnify and hold MEN and its officers employees subsidiaries affiliates and distributors harmless against all claims costs
16. ge for the respective operating system y For more information on supported operating system versions and drivers see online data sheet MEN Mikro Elektronik GmbH 4 20G204 00 2013 11 28 Configuration Options Configuration Options Cooling Concept Also available with conduction cooling in MEN CCA frame Please note that some of these options may only be available for large volumes Please ask our sales staff for more information For available standard configurations see online data sheet MEN Mikro Elektronik GmbH 2 20G204 00 2013 11 28 Product Safety Product Safety Electrostatic Discharge ESD Computer boards and components contain electrostatic sensitive devices Electrostatic discharge ESD can damage components To protect the board and other components against damage from static electricity you should follow some precautions whenever you work on your computer Power down and unplug your computer system when working on the inside Hold components by the edges and try not to touch the IC chips leads or cir cuitry Use a grounded wrist strap before handling computer components Place components on a grounded antistatic pad or on the bag that came with the component whenever the components are separated from the system Store the board only in its original ESD protected packaging Retain the original packaging in case you need to return the board to MEN for repair MEN Mikro Elektron
17. he backplane according to the CompactPCI Serial specification PICMG CPCI S 0 For a detailed description of the signals please refer to the CompactPCI Serial specification Connector type of 1 72 pin Airmax VS 4 pair right angle header 6 IMLA with end walls Table 3 Pin assignment of CompactPCI Serial P1 connector GND GND GND GND 6 PE_ PE_ PE EDD DE GND moos SNP PE GND REFCLKs GND 4 GA2 3 PCIE_ PE_ RST_ IPMB_ IPMB_ ent SNP wakes ing ONP GND MM M GND 12V 12V GND 12V 12V GND 12v 12V GND 42V 1 E K J H G F E D C B A Note The signals in gray font are specified in the CompactPCI Serial specification but not supported on this board MEN Mikro Elektronik GmbH 23 20G204 00 2013 11 28 3 Organization of the Board which is 400 ms G204 Organization of the Board The G204 complies with PCIe specification 3 0 except for the FPGA booting time All resources requested by the G204 are mapped through the PCle configuration space For a detailed description of the PCIe configuration space please refer to the PCIe specification 3 1 PCle Configuration Registers 3 1 1 Address Map The following register map is shown for reference only Table 4 PCle configuration regist
18. ik GmbH 6 20G204 00 E1 2013 11 28 About this Document About this Document A This user manual is intended only for system developers and integrators it is not intended for end users It describes the hardware functions of the board connection of peripheral devices and integration into a system It also provides additional information for special applications and configurations of the board The manual does not include detailed information on individual components data sheets etc A list of literature is given in the appendix History Issue Comments Date E1 First issue 2013 11 28 Conventions This sign marks important notes or warnings concerning the use of voltages which can lead to serious damage to your health and also cause damage or destruction of the component This sign marks important notes or warnings concerning proper functionality of the product described in this document You should read them in any case italics Folder file and function names are printed in italics bold Bold type is used for emphasis monospace A monospaced font type is used for hexadecimal numbers listings C function descriptions or wherever appropriate Hexadecimal numbers are preceded by Ox comment Comments embedded into coding examples are shown in green color hyperlink Hyperlinks are printed in blue color globe will show you where hyperlinks lead directly to the Internet so you can look for the
19. ne and or at the front panel Power up the system You can now install driver software for the G204 and M Modules MEN Mikro Elektronik GmbH 13 20G204 00 2013 11 28 Pm Getting Started 1 3 Installing Driver Software For a detailed description on how to install driver software please refer to the respective documentation You can find any driver software available for download on the G204 pages on MEN s website MEN Mikro Elektronik GmbH 14 20G204 00 E1 2013 11 28 Functional Description 2 Functional Description 2 1 Power Supply The G204 is supplied with 12V 5 5 via CompactPCI Serial connector 1 2 2 M Module Interface The M Module interfaces of the G204 comply with the M Module specification They support the following M Module characteristics A08 A24 208 D16 D32 INTA TRIGI TRIGO Note The G204 supports burst mode for PCIe the M Module interface however does not support burst mode 2 2 1 M Module Connector Connector types 60 pin plug 2 54 mm pitch square pins 0 635 mm gold Mating connector 60 pin receptacle high precision 2 54 mm pitch for square pins 0 635 mm gold 6 9 mm height MEN Mikro Elektronik GmbH 15 20G204 00 2013 11 28 Functional Description Table 1 Pin assignment of the 60 pin plug connectors A B C 1 CSx GND AS 2 A01 5V D16 3 A02 12V D17 4 A03 12V D18 5
20. ng production If you need support you should communicate these numbers to MEN Figure 5 Labels giving the product s article number revision and serial number Complete article number 02G204 00 O 00 00 00 641517 Revision number Serial number MEN Mikro Elektronik GmbH 28 20G204 00 E1 2013 11 28
21. over the M Module mounting standoffs have to be mounted to the M Module again using the four screws marked in the picture above Hold the M Module over the target slot of the G204 with the component sides facing each other MEN Mikro Elektronik GmbH 17 20G204 00 E1 2013 11 28 Functional Description Insert the front connector of the M Module into the cut out of the G204 front panel Align the 60 pin connectors of the M Module and the G204 Press the M Module carefully but firmly on the G204 making sure that the connectors are properly linked see picture below Turn the G204 upside down and use four M Module mounting screws M3x6 cross recess pan head screws to fasten the M Module on the solder side of the G204 Re install the D Sub front panel of the G204 Note You can order suitable mounting screws from MEN see MEN s website In any case use only the screw types specified above MEN Mikro Elektronik GmbH 18 20G204 00 E1 2013 11 28 MEN Mikro Elektronik GmbH 20G204 00 E1 2013 11 28 Functional Description 2 2 3 Configuring the M Module Interface M Module Control Status Register read write 31 18 17 16 GIEN 15 4 3 2 1 0 TOUT IEN IRQ GIEN TOUT IEN IRO Global interrupt enable bit common to all M Modules 0 Disable interrupt 1 Enable interrupt Global interrupt pending common to all M Modules re
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