KWV11-C programmable real-time clock: Difference between revisions

From Computer History Wiki
Jump to navigationJump to search
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}}
 
describe functionality
 
(4 intermediate revisions by 2 users not shown)
Line 1: Line 1:
[[Image:M4002.jpg]]
[[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
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:


{{stub}}
* 1 MHz
* 100 KHz
* 10 KHz
* 1 KHz
* 100 Hz
* line rate from the [[alternating current|AC]] power provided to the [[power supply]]
* external
 
The programming interface is fairly simple; there are two [[register]]s:
 
* 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 [[DEC card form factor|dual]]-height board ('''M4002''').
 
{{semi-stub}}
 
==External links==
 
* [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
* [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
 
[[Category: QBUS Peripherals]]

Latest revision as of 11:50, 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

Retrieved from "https://gunkies.org/w/index.php?title=KWV11-C_programmable_real-time_clock&oldid=25527"