Difference between revisions of "KWV11-C programmable real-time clock"

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(New page: Image:M4002.jpg This is a QBUS clock module... I know it goes into the PDP-11. It's also refered as a LSI-11 RTC {{stub}})
 
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[[Image:M4002.jpg]]
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[[Image:M4002.jpg|right|thumb|200px|KWV11-C programmable real-time clock]]
This is a [[QBUS]] clock module...  I know it goes into the PDP-11.
 
  
It's also refered as a LSI-11 RTC
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The '''KWV11-C programmable real-time clock''' is a [[QBUS]] clock module, very similar in functionality to the [[KW11-P Programmable Real-Time Clock]]. It can either provide interval counting, or produce either single or repeated [[interrupt]]s at a programmed rate (at a multiple of the base rate). Several different clock rates, five of them internal, are available:
  
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* 1 MHz
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* 100 KHz
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* 10 KHz
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* 1 KHz
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* 100 Hz
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* line rate from the [[alternating current|AC]] power provided to the [[power supply]]
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* external
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The programming interface is fairly simple; there are two [[register]]s:
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* control/status
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* buffer/preset
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The counter register can be set to count up, governed by the selected rate; an interrupt can be triggered when it reaches 0 on overflow. It can then optionally be automatically reloaded from the preset register.
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Physically, the KW11-P is an [[DEC card form factor|dual]]-height board ('''M4002''').
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{{semi-stub}}
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==External links==
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* [http://www.vaxhaven.com/images/0/01/EK-AXV11-UG-002.pdf LSI-11 Analog System User's Guide] (EK-AXV11-UG-002) - the KWV11-C is covered in Chapter 5
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* [http://www.bitsavers.org/pdf/dec/qbus/EK-192AA-MG-001_Microsystems_Options_Oct88.pdf Microsystems Options] (EK-192AA-MG-001) - configuration of the KWV11-C is covered on pp. 144-149 of the PDF
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[[Category: QBUS Peripherals]]

Latest revision as of 12:50, 11 April 2022

KWV11-C programmable real-time clock

The KWV11-C programmable real-time clock is a QBUS clock module, very similar in functionality to the KW11-P Programmable Real-Time Clock. It can either provide interval counting, or produce either single or repeated interrupts at a programmed rate (at a multiple of the base rate). Several different clock rates, five of them internal, are available:

  • 1 MHz
  • 100 KHz
  • 10 KHz
  • 1 KHz
  • 100 Hz
  • line rate from the AC power provided to the power supply
  • external

The programming interface is fairly simple; there are two registers:

  • control/status
  • buffer/preset

The counter register can be set to count up, governed by the selected rate; an interrupt can be triggered when it reaches 0 on overflow. It can then optionally be automatically reloaded from the preset register.

Physically, the KW11-P is an dual-height board (M4002).

External links