Agilent Technologies E1470A user manual Table B-3. Status Register Bit Patterns read

Page 45

CAUTION Registers have been documented as 8-bit bytes. If you access them using 16-bit transfers from a Motorola CPU, the high and low byte will be swapped. The E1406 uses Motorola CPUs. Motorola CPUs place the highest weighted byte in the lower memory location and the lower weighted byte in the higher memory address while Intel processors do just the opposite. VXI registers are memory-mapped. Thus, you will see this Motorola/Intel byte swap difference when doing register programming.

Manufacturer

Identification

Register

Device

Identification

Register

Status/Control Register

The Manufacturer Identification Register is a read-only register at address 00h (Most Significant Byte (MSB)) and 01h (Least Significant Byte (LSB)). Reading this register returns the Hewlett-Packard identification, FFFFh.

The Device Identification Register is a read-only register accessed at address 02h. Reading this register returns the module identification of 581 (245h).

The Card Status/Control Register is a read/write register accessed at address 04h. You read the Status Register and write to the Control Register.

Table B-3. Status Register Bit Patterns (read)

 

 

 

Address b+04h

 

 

 

 

 

 

Address b+05h

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

14

13

12

11

 

10

9

8

7

6

5

4

3

 

2

1

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

1

1

1

1

 

1

CDI0

CDI1

BSY

IEN

1

1

1

 

1

1

SR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SR (soft Reset): 0 = not in reset, 1 = held in reset state.

IEN: Main interrupt enable. Bit is set to 0 when interrupts are enabled; 1when interrupts are disabled.

BSY: Bit is set to 0 when module is busy - relays are settling. Bit is set to 1 if the module is not busy.

CDI0 and CDI1: When set to 0, indicates the relay assemblies are connected to the driver assembly. CDI0 is the right hand relay assembly, CDI1 is the left hand assembly. If either bit is set to a 1, the respective relay assembly is not installed.

Table B-4. Control Register Bit Pattern (write)

 

 

 

Address b+04h

 

 

 

 

 

 

Address b+05h

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

14

13

12

11

 

10

9

8

7

6

5

4

3

 

2

1

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

1

1

1

1

 

1

1

1

1

IEN

1

1

1

 

1

1

SR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SR (soft reset): Writing a “1” and then a “0” to this bit resets all relays on the module to their power-on/reset state.

IEN: Main interrupt enable. Writing a 1 to this bit causes an interrupt to be generated 16 msec after a value is written to any relay control register to indicate that a relay closure should be complete. At power-on/reset, this bit is set to 0.

Appendix B

Register-Based Programming 45

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Contents E1470-90002 Page Contents Appendix C RF Switch Error Messages Index Government Restricted Rights Agilent Technologies Warranty StatementDocumentation History Safety SymbolsManufacturer’s Address Manufacturer’s NameDeclares, that the product Product Name Model NumberPage Using This Chapter Switching DiagramChapter Cascade Relays COM 33 332 Creating Multiple Multiplexers Configuring the RF Switch ChapterMaximum POWER. The maximum RF power that can be applied RF Switch ConfigurationChapter Configuring the RF Switch On this moduleSetting the Logical Address Setting the Interrupt Request Level Installing User Wiring Configuring the RF Switch Chapter Connecting User WiringSMB Connectors and Connector Housings Assembling SMB Connector JacksUser Connections Wiring RF Switch Installing Device DriversProgramming the RF Switch Chapter Addressing the SwitchProgramming Examples Chapter Programming the RF SwitchProgramming the RF Switch Chapter Example Closing a Signal Path Example Opening Closing Signal Paths Example Saving Recalling Module States Programming the RF Switch Chapter Common Commands Format Command TypesScpi Commands Format Chapter RF Switch Command ReferenceScpi Command Reference Linking CommandsRF Switch Command Reference Chapter DIAGnosticCLOSe DIAGnosticDIAGnosticOPEN DIAGnosticCLOSe?DIAGnosticOPEN relay,relay... opens individual relays on Reset to its power-on state Common to NCDIAGOPEN333 DIAGnosticOPEN?RSTDIAGThis programCLOS042,043,053,054,256REL?returns DIAGnosticRELAY?ROUTePATHCOMMon ROUTeExample Closing Channel Path 10002 SYSTemERRor? SYSTemSYSTemVERSion? Command Ieee 488.2 Common Commands Quick ReferenceDescription Commands Quick ReferenceAppendix a Appendix a RF Switch SpecificationsRF Switch Specifications Appendix a About This Appendix Appendix BRegister Addressing Addressing OverviewFigure B-1. Register Address Locations Within VXI A16 Base AddressA16 Address Space Outside the Command Module Table B-1. General Register-based Programming Method Register DefinitionsTable B-2. Register Map Register-Based Programming Appendix BTable B-4. Control Register Bit Pattern write Table B-3. Status Register Bit Patterns readRelay Control Registers Vxie Table B-10. Writing to Relay Control Registers Create and open a device session Register Programming ExampleWait 5 seconds before resetting module Void errhandler /* Error Handling Routine Register-Based Programming Appendix B Appendix C Appendix C RF Switch Error MessagesRF Switch Error Messages Appendix C Index IndexIndex E1470-90002
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