VXI Microwave Matrix, SM7100 user manual Bbm/Mbb

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VXI Technology, Inc.

Control Register - Read and Write (continued)

			0	= BBM (Break-Before-Make) / MBB (Make-Before-Break) is disabled
			1	= BBM/MBB operation is enabled
			Pon state = 0
			NOTE: This bit should remain a 0 (disabled) for the SM7100.
			If this bit is set, the relays will be sequenced to effect proper BBM or MBB
			operation. If this bit is not set, the module will process the newly written relay data
			as immediate data, writing it directly to the relay driver ports. No BBM or MBB
			sequencing will take place.
			While this feature is enabled, the initial write to the module will start the delay
	D7	BBM/MBB	timer running		and begin the BBM or	MBB operation. Since the relays are
		BBM/MBB	controlled by		the 16-bit registers, only	the effected 16 relays will perform the
		Enable Bit	controlled by		the 16-bit registers, only	the effected 16 relays will perform the
		Enable Bit	BBM/MBB operation. To overcome this fact, any subsequent writes to the module,

			during the initial delay timer time-out period, will be accepted and processed. In
			addition, the delay time will be reset and begin counting down again. Once the
			delay timer has timed-out (this indicates that the relays have settled into their
			BBM/MBB state), writes to the module will not be accepted and may result in a
			Bus Error depending on the value programmed into the delay timer. This is because
			the delay timer is reset at the end of the initial time-out and is used to time the final
			relay closure into their post BBM/MBB state. The module Busy signal will only
			complete once the final relay closure state is reached.
			If this bit is set and no value has been loaded into the Delay Register, the module
			will act as if this enable bit is not set and load all of the relay drivers with
			immediate data.
			0	= BBM operation is selected
	D6	BBM/MBB	1	= MBB operation is selected
		BBM/MBB	Pon state = 0
		Select Bit	Pon state = 0
		Select Bit
			NOTE: This bit should remain a 0 (BBM) for the SM7100.
		Access	0	= non-active
		Access	1	= active
	D5	LED Fail	Pon state = 0
		Bit	Lights the Access LED red when activated.
			Lights the Access LED red when activated.
		Relay	0	= The Openbus and Front Panel Open signals are not enabled to reset the relays
	D4	Reset	1	= The Openbus or Front Panel Open signal may be selected to reset the relays
		Enable Bit	Pon state = 0
		Relay	0	= Front Panel Open signal is selected to reset the relays
		Relay	1	= The Openbus signal is selected to reset the relays
	D3	Reset	Pon state = 0
		Select Bit	Many plug-in modules may be programmed to be listeners on the Openbus.

		Openbus	0	= Disables the Front Panel Open signal from driving the Openbus signal
	D2	Out Enable	1	= Enables the Front Panel Open signal to drive the Openbus
		Bit	Pon state = 0.

30	SM7100 Programming

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Contents SM7100 VXI Technology, Inc Table of Contents Certification WarrantyLimitation of Warranty Restricted Rights LegendC L a R a T I O N O F C O N F O R M I T Y EMCGeneral Safety Instructions Terms and SymbolsAvoid Electric Shock Support Resources Overview ProgrammingSM7100 Specifications VswrSMA Calculating System Power and Cooling Requirements Setting the Chassis Backplane JumpersIntroduction Setting the Logical Address MSB LSBSelecting the Extended Memory Space VXI Technology, Inc SM7100 Preparation for Use Switch Configuration Front Panel Connection SM7000EXT GNDReturn GND SM7100 Module Configuration SM7100 Matrix Schematic Offset Hex VXI Technology, Inc SM7100 Module Configuration Register Access AddressingSmip II Register MAP A16 Offset Write FunctionDevice Type Register 0x02 Read Only ID Register 0x00 Read OnlyLogical Address Register 0x00 Write Only Status Register 0x04 Read OnlyReserved Register 0x0C Read Only Offset Register 0x06 Read and WriteReserved Register 0x0A Read Only Version Number Register 0x0E Read OnlyInterrupt Control Register 0x1C Read and Write NVM Access Resister 0x20 Read OnlyNVM Access Resister 0x20 Write Only Subclass Register 0x1E Read OnlyTrace RAM End High Register 0x2C Read and Write Trace RAM Start High Register 0x28 Read and WriteTrace RAM Start Low Register 0x2A Read and Write Trace RAM End Low Register 0x2E Read and WriteOpen Trigger Select Register 0x36 -Write Only Loop EnableTrace Enable TTL Trigger Polarity Register 0x38 -Write OnlyBoard Busy Register 0x3E Read Only Busy Trigger Control Register 0x3C Read and WriteTrigger Advance Register 0x3E Write Only Reserved Registers Read and WriteAddr AcfailnBBM/MBB Control Register Read and Write Delay Register Read and Write Relay Register Offset Writing to the RelaysVIA16SPACE Index SM7100