Tektronix VX4521 User manual

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User Manual
Tektronix
/
VX4521
Advanced Resource Manager
This document applies for firmware version 1.00
and above.
Please check for change information
atthe rear of this manual.
Second Edition: September 1994
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Copyright O Tektronix,Inc. 1992, 1994. All rights reserved.
Tektronix products are covered
by U.S. and foreignpatents, issued and pending.Information in this publication supercedes
that
in all previouslypublished material. Specificationsand price change privilegesreserved.
Printed in the U.S.A.
Tektronix,Inc., P.O. Box 1000,Wilsonville, OR 97070-1000
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
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WARRANTY
TekUonix w'mants that this product will be free from detccts in materials and workmanship for a period of three
(3) years from the date of shipment. If any such product proves defective during this warranty period, Tektronix,
at its option, either will repair the defective product without charge for parts and labor, or will provide a
replacement in exchange for thc defective product.
In order to obtain service under this warranty, Customermust notify Tektronixof the defect before the expiration
of the warranty period and make suitable arrangements for the performance of service. Customer shall be
responsible for packaging and shipping the defectiveproduct to the service center designated by Tektronix, with
shippingcharges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a
location within the counlry in which the Tektronix service center is located. Customer shall be responsible for
paying
all shipping charges, duties, taxes, and my other charges for products returned to any other locations.
This warranty shall not apply to
any defect, failureor damage caused by improper use or improper or inadequate
maintennnce and care.l'ektronix shall not be obligated to furnish service under this warranty a) to repair damage
resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product;
b) to repair damage resulting from improper use or connection to incompatible equipment; or c) to service a
product that has been modified or integrated with other products when the effect of such modification or
integrationincreases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIXWITH RESPECT TOTHIS PRODUCT IN LIEU OF
ANY OTHER WARRANTIES, EXPRESSEDOR IMPLIED. TEKTRONIX AND ITS VENDORS
DISCLAIMANY IMPLLED WARRANTIES OFMERCHANTABILITYOR FITNESS FOR A
-
PARTICU1,AR PURPOSE. TEKTKONIX' RESPONSIBILITYTO REPAIR OR REI'LACE DEFECTIVE
PRODUCTS IS
THE SOLEAND EXCLUSIVE REMEDY PROVIDEDTO THE CUSTOMER FOR
BREACH OFTHIS WARRANTY. TEKTRONIXAND ITS VENDORS WILL NOT BE LIABLE FOR ANY
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAI,DAMAGES IRRESPECTIVE OF
WHETHER TEKTRONIX OR
THE VENDOR HAS ADVANCE NOTICE OFTHEPOSSIHI1,ITY OF
SUCHDAMAGES.
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WRT
WRTB
WRTBSETUP
WSCMD
WSCMD?
WRT
7, z2 z,;Data - writes to VME memory space. (3 - 541
WRTB Data
- writes to VMEbus memory space. (3 - 56)
WRTBSETUP
z, 7, z3 - sets up parameters for a write to VMEbus
memory space. (3
- 57)
WSCMD LA, CMD - sends the specified WSP conirnand to a VXI
device. (3
- 581
WSCMD? LA, CMD
- sends the WSP command to a VXI tlevlce. The
response value is returned in ASCII decimal format. (3
- 59)
The input trigger llnes are any one of the 8
TRIGGER COMMANDS VXlbus TTL trigger lines, either
of the 2 VXlbus
ECL trlgger lines, the front panel External trlgger
input, the VX4521's software trigger, or the IEEE-488 GET signal The output trigger
lines may be any combination of the 8 TTL trlgger lines, the 2 ECL trrgger lrrles or th~
front panel output trlgger line. All coninlands must terrnlnate with a
< CH > .c LF >
ConnTrg (Source Dest IEnblll - allows connecting one Input trlgger Ilne to orit: or riiore
output trigger I~nes.(3
- 63)
DcorrTrg (Source IDestl)
- selectively d~sconriectsan Input trlgger Ilne from o1ie or
more outp~lttrigger Ilnes, without aflectcng any other output trigger llrle
coririectlorls to that input Ilne.
(3 - 64)
EriblTrg (IDestl] enables the trlgger llne connectlon estabhshed wlth thv Cor~nTrg
conirnand (3
- 65)
nsblTrcJ(IOestl) dlsahles the trlgger connectlon set by the ConnTry c~~r~rrlrarid
13 661
DelayTrg (Source Dest Delay IContl [HI [ENBLII
- speclfles a delay between tlre Inpttt
trlgger event and the output trigger signal.
(3 - 671
PulseTrg (Source Dest Period ICont]
(HI IENBLI) - converts the Input trlgyer event to a
low golng output pulse or square wave of user-definedfrequency.
(3 - 69)
Swlrg generates the VX4521's software trlgger. (3
- 70)
TryCnfg - returns the current trigger connectlon matrix In table format. (3 - 71)
VX4521 INTERFACE MODULE
QUICK REFERENCE GUIDE
Nurnbers inparentheses refer to the page(s) in the Operating Manual
Be sure all switches are correctly set. (p.
1 - 31
SETUP Follow Installotion guidelines.
Ip. 2 - 1)
LEDs
Power
Faled
MSG
AST
LTN
TLK
SRQ
ATN
REN
When 111, the LEDs irid~catethe following:
power supphes functioning
niodule failure
rnodule is processing a VMEbus cycle
lnd~catesVMEbus activ~tybymonitor~ngAddress Strobe (AS
' I
a device IS addressed as a llstener on the IEEE-488bus
a device 1s addressed as a talker on the IEEE-488 bus
tlw SRQ lilie onttie IEEE 488 bus
IS set true
the ATN line on the IEEE-488 bus is set true
ttie REN hne on the IEEE-488bus 1s set true
The twodlsplays onthe front panel show IEEE-488
FRONT PANEL DISPLAY bus data In
hexadecimal format whenever the front
pmel Normallstep sw~tch
IS In the STEP (up)
pos~f~ori
7Iit3 dlqpldys are turned off whenever the Normallstep swltch Is
In the
NORMAL
(down) pos~t~ori
The upper d~splaycorresponds to brts 4 7 on the IEEE 488
d,rtd bus, and the lower drsplay to blts
0 3 of the bus
When the VX4521 is addressed as a
VXI USEf? IFEBACECOMMANDS Listener on the IEEE-488bus, it will
recogn~recertain ASCII strings that
WIII causc an actlor1 to occur or cause a response to be formatted and returned to the
IEEE-488 controller the next time the VX4521 is addressed as a Talker on the bus.
The syntax and symbols used inthe command descriptions are:
( I optlorial parameter
( ) grot~pof parameters
<CR>
carriage return (decimal 13. Its use is host-specific and it may not be
required as a terminator. Consult the host's Operating Manual.
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< LF > l~nefeed (declmal 101.
Its use is host.specific and it may not be
required as a terminator. Consult the host's
Operating Manual.
white space
- blank and comma. Used to separate flelds in a coriini;~nd
containing multiple parameters.
LA logical address
(1 - 255)of the VXlbus device to recerve the corwnand,
In either ASCll decimal or hex notation. An ASCll hex riirrnl~errnust be
preceded by
'#H' or '#li'.
All cornmands niusl terminate
with a <CR > <LF >.
81.10
DL AD?
DL IS?
DNUR47
€NO
FDCREAD
F DCWRITE
GRANT
HDLLINE
HDLMATRIX
!{ELI'
INSLINE
BNO LA
- Issues the BeqnNormal Operat~orrcornor,irrtI to 111e~ncl~cated
dev~ce(3
- 141
DLAD? returns a lrst of the log~cdladdresses for all tlev~crsIn the
VXI
systern. (3 17)
DLIS? (LA) returns ~nforniatronon the dev~cescor~ip~i~,~rrg ttrt. VXI
system. (3
- 181
DNUM? - returns the nmher ol dcvlccs 111 [lie VXl syst~!rii
(3 23)
EPJO LA - lsstles the End Nornial Operntrciri WSP r:or~t~iia~ttl ro tlic.
~r~d~cateddeuce. (3 241
read data from a VXI servant's shared riieniory us111~jF.i:,r Daln
Cliarrnel prolocol. (3
. 25)
GRANT ComnianderLA ServantLA
- the servanl dewce at loglcal
address ServantLA will be granted to t11e coniriiander tlevtce at I<~g~c;il
address Cornri~clnderLA.
(3 - 271
HDLLINE LA Handler returns the VME IHU lhrre assoc1.9r1:dw~tlitht:
specrfred interrupt Handler ondevrce
I A. 13 . 28)
HDLMATRIX
- returns the Interrupt Iial~dlernralrtx rnalr~li~~ned~~~rer~idlly
IJ~ the Resource Manager. (3 - 291
INTLINE LA lriterrupter returns the VMk IRQ Ilnc ,issot:~,~tt:dw~tlithe
specifled lriterrupter ondevice LA. (3
- 311
INTMATRIX
LOCK
MAP
READINTS
RED
HEDB
REDBSETUP
RELEASF
RESET
SETIIDL
SRO
S7 ATUS
TABLE
TEST
TIMEOUT
1
INTMATRIX - returns the interrupter matrlx table maintained Internally
bythe Resource Manager.
(3 - 32)
LOCK LA ('CLEAR')
- sends the WSP cwirnands Set Lock or Clear Lock
to the indicated VXlbus device. (3
- 331
MAPLA IEEEAdr
- specrfies 8 particular IEEE-488 address to be
associated
with a partrcular Log~calAddress. (3 - 34)
READHDLS LA
- returns the ntrtnber olinterrupt Ircres the devicu at LA
rilay handle siniultaneously. I3 . 35)
READINTS LA
- returns the number of interrupt lines the dev~ceat LA
rimy drive simultaneously. 13 - 36)
RED
7, z, z, 2, z6 - reads VME nieniory space. 13 37)
REDB cxccules tlre VMEbus last b~naryrcads.
(3 - 39)
REDBSETUP z, z2 z, z, - sets upthe VX4521 for fast blnary VMEbus
reads. (3
- 401
RELEASE ComnlanderLA ServantLA the servant dev~ceat log~cal
address ServantLA
IS released from the commander devrce at logical
address ComnianderLA.
RESET
(1 A1 ('SAFE'] cesets a selected VXI device. 13
- 42)
SETHDL LA Handler IRQ ('send')
- updates 11leInterrupt Hsridler Matl~x
tdllie in (ha Reso~rrceM,~nnger.(3
- 44)
SFTINT LA Irilt:lrup!er IRQ ('send') allows the Interrupter Matrix table
In the Resource Manager to be modlfied and optionally cause the
Interrupt trrerarchy to be modified to march the rnatrix.
(3 - 461
SRU ('CLEAR')
- enables or ~~Is~IOIL'Sthe geric:ratlori ol IEEE-488SRQs
wlicl~cverthe VX4521 detects an error. (3
- 48)
Sl ATUS (LA) - returns the current error status of a VXI device. (3 - 491
TABLE - returns the number of devrces and conf~gurationinformatron
for each devrce inthe mainframe which it controls. (3
- 50)
7 LS1 cxecules the 0~11lt 111 SO/( test ~ouli~re.(3 - 52)
TIMEOUT (2)
- assigns the ornount of time the VX4521 waits for the
assertion of the Reed Ready andlor Write Ready bits ina device's
Response register during WSP data transfers.
(3 - 53)
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Table of Contents
Section 1
General Informationand Specifications
Introduction ...................................................................... 1 . 1
ControlsAnd Indicators ............................................................ 1 . 2
Switches .................................................................... 1 3
.
Fuses ....................................................................... 1 . 5
LEDs ................................................................ 1 . 5
FrontPanelDisplay ................................................................ 1 . 6
.
..................................................................... Specifications 1 9
Section 2
PreparationFor Use
. InstallationRequirementsAnd Cautions .............................................. 2 1
. InstallationProcedure .............................................................. 2 2
. InstallationChecklist ............................................................... 2 4
Section 3
. Operation
. Overview ......................................................................... 3 1
Power-up ......................................................................... 3 . 2
. Module Operation ................................................................. 3 2
...........................................................
ResourceManager 3- 2
.
..............................................................
SlotOFunctions 3 5
IEEE-488lnterface ............................................................ 3 -5
.
VMEbus System Functions .................................................... 3 6
. IEEE-488Control Lines ........................................................ 3 7
.
IEEE-488BusCommands ..................................................... 3 8
.
System Operation ........................................................... 3 10
.
VXI User InterfaceCommands ........................... , .................... 3 11
Triggercommands .......................................................... 3 . 60
.
ErrorHandling .......................................................... 3 73
Section 4
Programming Examples
Definitionof BASIC Commands ..................................................... 4 . 1
. ProgrammingExample InBASIC .................................................... 4 2
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Table of Contents
Appendices
.
Appendix A . VXlbus Operation .................................................... A 1
.
.
Appendix B Input/Output Connections ............................................. A 3
.
Appendix C . VXI Glossary ........................................................ A 5
.
Appendix D . Shifting Method ..................................................... A
13
.
Appendix E . User Service ........................................................ A 15
List of Illustrations
.
Figure 1 : VX4521 Controlsand Indicators ............................................ 1 7
Figure 2: Front Panel .............................................................. 1 . 8
Figure 3: Typical System Hierarchy .................................................. 3 - 4
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Safety Summary
The general safety information in this summary is for both operating and servicing personnel.
Additional specific warnings and cautions are found throughout the manual where they apply,
and may not appear in this summary.
TERMS
In This Manual
WARNING statements identify conditions or
practices that could result in personal injury or
loss of life.
CAUTION statements identify conditions or
practices that could result in damage to the
module or other property.
Marked on the Module
DANGER indicates a personal injury hazard
immediately access~bleas one reads the
marking.
CAUTION indicates a personal injury hazard
not immediately accessible as one reads the
marking, or a hazard to property, including the
module itself.
SYMBOLS
In This Manual
I :
This symbol indicates where
- applicable cautionary or other
information is to be found.
a This symbol indicates where
special explanatory information is
included in the manual. There is
no caution or danger associated
with the information.
Marked on the Module
k DANGER - High Voltage.
-\
- Protective ground (earth)termmal.
\s/
h ATENTION - Refer to the
A
manual.
0
Refer to manual before using.
Power Source
This module is intended to operate in a
mainframe whose power source does
not apply more than
250V rms between
the supply conductors or between
either supply conductor and ground.
A
protective ground connection through
the grounding conductor in the power
cord(s)is essential for safe operation.
Grounding the Module
This module is grounded throuah the
grounding conductor of the mainframe
power cordls). To avoid electrical
shock, plug the mainframe power
cordts) into a properly wired receptacle
before connecting to the module
connectors.
A protective ground
connection through the mainframe is
essential for safe operation.
Danger Arising from Loss of Ground
Upon loss of the protective-ground
connection, all accessible conductive
parts can render an electric shock.
Use the Proper Fuse
To avoid fire hazard, use only fuses
specified in the module parts list. A
replacement fuse must meet the type,
voltage rating, and current rating
specifications required for the fuse that
it replaces.
Do Not Operate in Explosive
Atmosphere
To avoid explosion, do not operate the
module in an explosive atmosphere.
Do Not Remove Covers or Panels
To avoid personal injury, the module
covers should be removed only by
qualified service personnel. Do not
operate the module without covers and
panels properly installed.
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Advanced Resource Manager
Section 1
General Information
and Specifications
Introduction
The VX4521 Advanced Resource Manager Module is a printed circuit board assembly
for use inthe slot
0 position of a mainframe conforming to the VXlbus Specification,
such as the VX1400
C size mainframe used in the Tektronix IAC System. It conforms
to the VXlbus System Specification for a Resource Manager, Slot
0 Device, and IEEE-
488 lnterface Device for a C size module. The VX4521 performs three functions
critical to the proper operation of a VXlbus system:
1)
it is the VMEbus system controller required bythe VMEbus Specification;
2)
it prov~desboth the VXlbus Resource Manager and Slot 0 functions required by
the VXlbus Specification;
3)
it acts as the communications interface between the station computer and the
VXlbus chassis (VX1400Mainframe) using the iEEE-488 General Purpose
lnterface Bus.
As the VMEbus Controller, the VX4521 Module provides the bus arbiter, interrupt daisy
chain driver, bus time out, and system clock driver. It is also a VMEbus master. Since
the
VX4521 makes all VMEbus operations transparent tothe user, no VMEbus
knowledge is necessary to operate the VX4521 or any VXlbus system in which it is
installed. The IEEE publication IEEE
101 4 (1 987) offers more information on VMEbus
operation.
The Resource Manacler portion of the module is a VXlbus message based instrument
located at logical address
0. After a maximum five second delay following power-up or
system reset to allow individual IAC modules time to perform any required setups and
self tests, the Resource Manager initializes the system and identifies all VXlbus devices
in the system. It then builds a configuration table that contains status information for
each device, ~ncludingself test passlfail results, slot location, manufacturer
ID, model
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Section 1
code, and other system information. The table may be up-loaded to the station
controller through the IEEE-488 interface. The Resource Manager also configures
.--
system address maps, sets up the commanaer/servant hierarchies for the system, and
then initiates normal system operation.
The VX4521 Resource Manager conforms to the VXlbus Specification Version
1.3 and
can support VXI devices implementing either the
1.2 or the 1.3 version of the VXlbus
Specification.
The slot
0 functions include a 10 MHz different~al ECL clock driver for the backplane
(CLKIO), and transceivers for the MODlD lines.
The IEEE-488 Interface portion of the VX4521 Module converts IEEE-488 protocol to
VXlbus instrument protocol. It routes the incoming IEEE-488 instructions and data to
the proper instrument (IAC module) in the ma~nframeand returns instrument responses
to the IEEE-488 bus controller. It can also be switch selected to allow the VXIbus
svstem to either assign each IAC module its own IEEE-488 primary address (multiple
primary addressing), or to assign the overall system
a single IEEE-488 address and each
of the IAC modules a secondary address (single prlmary with multiple secondary
addresses).
The VX4521 Module will execute a self test at power-up, on direction of a VXlbus hard
reset, or on command.
A VXlbus hard reset cccurs when the Reset switch on the
module's front panel is depressed, asserting the backplane line SYSRST*. The VX4521
can initiate a VXlbus soft reset in any VXlbus module in the chassis under command of
the system controller.
V
The VX4521 also has extensive trigger control capabilities. Under user control, the
trigger control circuitry can:
transparently pass trigger signals from one trigger line to another,
route trlgger signals to and from the front panel external trigger spigots,
h generate trigger events,
t
force the synchronizat~onof an output trigger event to the rising edge of the
VXlbus
CLK10 signal,
convert an Input trlgger event to a s~ngleoutput signal of a different pulse width,
convert a single input trigger event to a delayed output signal or a pulse train of
variable frequency, with each output pulse
200 ns wide, and
convert a single input trigger event into a continuous square wave of variable
frequency.
Controls And Indicators
The following controls and indicators are provided to select and display the functions of
the VX4521 Module's operating environment. See Figures
1 and 2 for their physical
locations.
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Section I
Switches
IEEE-488 Address Switches
L&WL ADORES
The VX4521 has two hexadecimal rotary switches which determine either the
--
primary IEEE-488 address of the mainframe and/or the IEEE-488 address of the
HM
VXlbus Resource Manager. This is discussed more fully in the paragraph on
ra3 ~50 the Configuration swrtch.
M L
L. S S Base Phys~cal
A.
D D Addr. (d)
Ah
0 A (64.10) +49l52 = 49792d
15h
1 5 (64*21)+49152 = 50496d
where: L.A. = iogical Address
MSD = Most Sigmflcant Digit
LSD = Least S~gnif~cantDigit
Confisuration Switch
Setting this eight-position rocker switch determines the type of IEEE-488
addressing to be used (switch
11, whether or not the VX4521 will generate SRO's
on error conditions (switch
21, the type of IEEE-488 mapping algorithm to use
(switch 31, and which VMEbus arbitratron level will be used when the module is
acting as a Master of the VMEbus (switches
7 and 8). The settings of the eight
rockers are as follows:
open
= IEEE-488 primary address for each VXI logical address in the mainframe.
closed
= one primary address for the mainframe with a secondary address for
each
VXI logical address in the mainframe.
If switch
1 is closed, then the two rotary switches on the VX4521 determine the
IEEE-488 primary address for the entire mainframe. The VX4521'SIEEE-488
secondarv address will be
30.
The standard type of IEEE-488addressing is described in the O~erationsection,
and the shifting method in Appendix
D.
2 - SRO Generation on Error Detection:
open
= IEEE-488 Bus Service Request (SRQ)generated when the VX4521
detects an error. See the Error Handlinqsection for possible sources of errors.
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Section 7
closed = SRQ generatlon on error detection is disabled. However, other
instruments in the system may still generate an SRQ by sending the VXlbus
Request True event to the VX4521.
3 - IEEE Address M~DD~~QAlaorithm:
closed
= the iEEE address is mapped to the logical address using the direct
method.
open
= the IEEE address is mapped to the logical address using the shifting
method.
These two methods are described in the Ooeration section.
7 and 8 - VMEbus Arbitration Level:
These two switches determine which
Bus Request level will be used by the
VX4521 when
it requests use of the VMEbus. The setting of rockers 7 and 8 for
the required Bus Request levels is:
Rocker Rocker
7
- 8 Level
closed closed
0
closed open
1
open closed
2
open open
3
VMEbus Interru~tHandler Level Switch:
El
This BCD rotary switch deterrnlnes wh~chIRQ line on the VMEbus w~llbe mon~tored
Ill-ePRuPT
by the VX4521. If the switch IS set from 1 through 7, then the correspondlng VME
4"OLEil
IRQ line will cause the lnterrupt Handler to execute. Any other settmg wiil cause the
Interrupt Handler to be disabled. The actions taken by the VX4521 when the selected
IRO line goes true are described In the O~erationsection of this manual under
Interrum
Handler.
If an instrument in the mainframe uses VMEbus interrupts and is a servant of the
VX4521, then the interru~tlevel chosen for the
VX4521 interrupt handler and its
servant's interrupt ievels must be the same.
Note that the lnterrupt Handler may be disabled by setting the switch to any number
other than
1 through 7.
Reset Switch
This momentary switch on the front panel is labeled
RESET, and is used to perform a
system-level reset. Pressing the switch generates the VMEbus' system-reset signal
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Section 7
(SYSRESET') on the VMEbus backplane, and also resets the VX4521 Module's
on-board microprocessor. Pressing this switch causes a VXlbus hard reset.
InternalIExternal
CLKl 0
-
= - i I,lx lo
This red double-pole double-throw rocker switch has two positions, labeled C1 and
=. , mtwtrt~~
C2. When the switch is in the C1 position, the on-board oscillator is used to drive
CLK10 on the backplane. When the sw~tchis
in the C2 position, the internal
oscillator is disconnected from the backplane driver and the SMB external clock
connector on the front panel is connected to the backplane driver.
IEEE-488 Sinsle-ste~Switch
This front panel 3-position toggle switch is labeled NORMAL (down position), and
STEP
(momentary-upposition). It allows the VX4521 Module to act
as an IEEE-488 bus
monitor.
When the switch is set to the
NORMAL position, the IEEE-488 bus runs at its normal
speed. When the switch
is set to the center position, the VX4521 Module does not
complete IEEE-488 handshaking of the NDAC line for the current IEEE-488 bus cycle
until the switch is pressed to the STEP position. At that time, the bus handshaking is
completed and data from the next bus cycle (when it occurs) is latched into the display.
Bus data is stepped one byte at a time when the Single-step switch is pressed. This
feature allows single stepping of the IEEE bus even if the instrument addressed is not
in
the VX1400 Mainframe.
Fuses Each of the VX4521 power buses is protected with an on-board fuse to protect other
modules within the VXlbus chassis in the event that an inappropriate voltage is applied
to this module's front panel connector.
The fuse also protects the module in case of an
accidental shorting of the power busses or any other situation where excessive current
might be drawn.
If any of the fuses open, the power
LED (PWRI on the front panel will turn off.
The VX4521 Module has fuses for
+ 5V, -5.2V and -2V.
If any of the fuses opens, remove the fault before replacing the fuse. Replacement fuse
information is given in the S~ecificationssection of this manual.
LEDs The following
LEDs are visible at the top of the VX4521 Module's front panel to
indicate the status of the module's operation:
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Section 7
POWER LED
When lit, this green LED indicates that the following power supply voltages are present
on the backplane:
+ 24, -24, + 12, -1 2,
+ 5, -5.2. and -2. This LED will go out if the
5V,
-5.2V, or -2V fuses opens, or if any of the other power supply voltages are not
present.
SYSFAIL LED
This red LED is
lit during the five second self test period following power-up and
whenever a module in the mainframe asserts the VMEbus backplane signal SYSFAIL*,
including during self test. VX4521 Module failures include failure to correctly complete
a self test or loss of a power rail. The VX4521 will also light this LED if
it detects a
failure of a module due to a breakdown of communications, even if the SYSFAIL* signal
is unasserted. Reading the status of the VX4521 will extinguish this LED.
MESSAGE LED
When
lit, this green LED indicates that the VX4521 is either accessing the VMEbus as a
master or is currently being accessed as a VMEbus slave. The LED appears to stretch
the length of the VMEbus cycle. For example, a five microsecond cycle will light the
LED for approximately
0.2 seconds. The LED will flash if the module is being
constantly addressed or is constantly accessing the VMEbus.
ADDR STROBE LED
-
This green LED indicates VMEbus activity by monitoring Address Strobe (AS') on the
VMEbus.
It is lit whenever any type of VMEbus cycle is in progress, regardless of
which system component is acting as the bus master. As the duty cycle of AS*
increases, the LED will become brighter.
Front Panel Display
The 4-digit display on the front panel shows IEEE-488 bus data in hexadecimal format
on the two right-most digits and in ASCII format on the left-most digit. The second
digit from the left will display a "T" when the VX4521 or
a card in the mainframe is
currently addressed as
a Talker on the IEEE-488 bus, or an "L" will be displayed for a
Listener. An "S" will be displayed if an SRQ is pending for any card in the mainframe.
N 0 TE:
The "S" will override the "T" and the "L".
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Figure 7: VX452 1 Controls and indicators
'V Rfi
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Section 1
-0VINCED
1 MANAGER
I
Figure 2: Front Panel
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Section 1
Specifications
Functions: VXI Resource Manager, Slot
0 functions, VMEbus controller, and
IEEE-488 interface device.
VXI Resource Manaaer:
Device Type: Message based device.
Registers:
Logical Address:
Capability:
Slot
0 Functions:
MODID Lines:
Keying:
ID.
Device type.
Status.
Response.
Data low.
Signal.
See Append~x
A for definition of reglster contents.
0 (may not be altered)
The Resource Manager is fully compliant with the VXlbus
Specifications for a Resource Manager.
10 MHz ECL differential; 1OH116type driver.
Pulled up by 16.9K ohms; lines may be driven and monitored.
The left side is keyed for TTL signal levels.
VMEbus Funct~ons:
Bus Master: A24lD16.
Bus Slave: A16lD16.
Bus Arbiter: Prioritized arbiter.
Bus Requestor: Fair requestor.
Arbitration Level: Switch selectable to anv levei.
Svstem Reset: Driven by on-board power-up monitor, or
driven
by front panel switch.
Interrupt Handler: Single level capability, switchable to any level.
-.
Bus Time Out (BTO):
100 ps.
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Section 1
IEEE-4881VXlbus Interface:
IEEE-488.1 Subsets
Supported:
Addressing
Capability:
Special
Capability:
IEEE-488 Throughput:
Listener:
Talker:
Triaaers:
External In:
External Out:
General:
Power Requirements:
Voltage:
Current (Peak
Module, I,,):
SH1 Source handshake.
AH
1 Acceptor handshake.
TE6 Talker extended.
LE4 Listener extended.
SR1 Service request.
DCl Device clear.
DTI Device trigger.
PPO Parallel poll.
Single prirnary/multiple secondary or multiple primary. Switch
selectable. VX4521 has a unique IEEE-488 address and may be
commanded and queried by the System Controller.
Single step. VX4521 may act 3s an IEEE-488 bus analyzer.
140
ps start-up (addresschange).
Byte Transfer Prct?col
= 250 I< byteslsecond.
Fast Handshake F;~:tocol - 400 I< bytesisecond
Byte Transfer Protocol
= 120I< byteslsecond.
Fast Handshake Protocol
= 180 I< bytesisecond.
Fast Handshake Protocol
= 275 I< bytesisecond.
TTL Type Input.
50 Ohm line driver (74S2403.
EXT
IN to backplane trigger lines (TTLO-7, ECL 0-1 ); or backplane
trigger lines
ITTLO-7, ECL 0-1) to EXT OUT:
unsynchronized to CLI<10
= 80 ns maximum.
synchronized to CLI<10
= 200 ns.
All required dc power is provided by the Power Supply in the VXlbus
mainframe.
+5 Volt Supply: 4.75V dc to
5.25 V dc.
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